/* SPDX-License-Identifier: GPL-2.0-only */
/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
 * Copyright(c) 2013 - 2014 Intel Corporation.
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#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 AVF 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,
};

/* 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 */
        VIRTCHNL_OP_IWARP = 20, /* advanced opcode */
        VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP = 21, /* advanced opcode */
        VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP = 22, /* advanced opcode */
        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,
        /* opcode 34 - 44 are reserved */
        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_MAX,
};

/* 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[ETH_ALEN];
};

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                  BIT(0)
#define VIRTCHNL_VF_OFFLOAD_IWARP               BIT(1)
#define VIRTCHNL_VF_OFFLOAD_RSS_AQ              BIT(3)
#define VIRTCHNL_VF_OFFLOAD_RSS_REG             BIT(4)
#define VIRTCHNL_VF_OFFLOAD_WB_ON_ITR           BIT(5)
#define VIRTCHNL_VF_OFFLOAD_REQ_QUEUES          BIT(6)
/* used to negotiate communicating link speeds in Mbps */
#define VIRTCHNL_VF_CAP_ADV_LINK_SPEED          BIT(7)
#define VIRTCHNL_VF_OFFLOAD_VLAN                BIT(16)
#define VIRTCHNL_VF_OFFLOAD_RX_POLLING          BIT(17)
#define VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2       BIT(18)
#define VIRTCHNL_VF_OFFLOAD_RSS_PF              BIT(19)
#define VIRTCHNL_VF_OFFLOAD_ENCAP               BIT(20)
#define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM          BIT(21)
#define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM       BIT(22)
#define VIRTCHNL_VF_OFFLOAD_ADQ                 BIT(23)
#define VIRTCHNL_VF_OFFLOAD_USO                 BIT(25)
#define VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF          BIT(27)
#define VIRTCHNL_VF_OFFLOAD_FDIR_PF             BIT(28)

#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.
 */

/* 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;
        u32 pad1;
        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 all 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.
 */
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.
 * PF configures interrupt mapping and returns status.
 */
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.
 */
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_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[ETH_ALEN];
        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);

/* 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 eth_stats in an external buffer.
 */

/* 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);

/* 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[ETH_ALEN];
        u8      dst_mac[ETH_ALEN];
        __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,
};

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;
        u8      pad[3];
};

VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);

/* 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,
};

#define PF_EVENT_SEVERITY_INFO          0
#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;
                        bool link_status;
                } link_event;
                struct {
                        /* link_speed provided in Mbps */
                        u32 link_speed;
                        u8 link_status;
                        u8 pad[3];
                } link_event_adv;
        } event_data;

        int severity;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);

/* VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP
 * VF uses this message to request PF to map IWARP vectors to IWARP queues.
 * The request for this originates from the VF IWARP driver through
 * a client interface between VF LAN and VF IWARP driver.
 * A vector could have an AEQ and CEQ attached to it although
 * there is a single AEQ per VF IWARP instance in which case
 * most vectors will have an INVALID_IDX for aeq and valid idx for ceq.
 * There will never be a case where there will be multiple CEQs attached
 * to a single vector.
 * PF configures interrupt mapping and returns status.
 */

struct virtchnl_iwarp_qv_info {
        u32 v_idx; /* msix_vector */
        u16 ceq_idx;
        u16 aeq_idx;
        u8 itr_idx;
        u8 pad[3];
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info);

struct virtchnl_iwarp_qvlist_info {
        u32 num_vectors;
        struct virtchnl_iwarp_qv_info qv_info[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info);

/* 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,
};

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

#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,
};

/* 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,
        /* 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,
};

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;
        u8 pad[3];
        /**
         * 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);

/* 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.
 *
 * 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.
 */
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_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_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;
        int 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;
                        valid_len += (vqc->num_queue_pairs *
                                      sizeof(struct
                                             virtchnl_queue_pair_info));
                        if (vqc->num_queue_pairs == 0)
                                err_msg_format = true;
                }
                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;
                        valid_len += (vimi->num_vectors *
                                      sizeof(struct virtchnl_vector_map));
                        if (vimi->num_vectors == 0)
                                err_msg_format = true;
                }
                break;
        case VIRTCHNL_OP_ENABLE_QUEUES:
        case VIRTCHNL_OP_DISABLE_QUEUES:
                valid_len = sizeof(struct virtchnl_queue_select);
                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;
                        valid_len += veal->num_elements *
                            sizeof(struct virtchnl_ether_addr);
                        if (veal->num_elements == 0)
                                err_msg_format = true;
                }
                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;
                        valid_len += vfl->num_elements * sizeof(u16);
                        if (vfl->num_elements == 0)
                                err_msg_format = true;
                }
                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_IWARP:
                /* These messages are opaque to us and will be validated in
                 * the RDMA client code. We just need to check for nonzero
                 * length. The firmware will enforce max length restrictions.
                 */
                if (msglen)
                        valid_len = msglen;
                else
                        err_msg_format = true;
                break;
        case VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
                break;
        case VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP:
                valid_len = sizeof(struct virtchnl_iwarp_qvlist_info);
                if (msglen >= valid_len) {
                        struct virtchnl_iwarp_qvlist_info *qv =
                                (struct virtchnl_iwarp_qvlist_info *)msg;
                        if (qv->num_vectors == 0) {
                                err_msg_format = true;
                                break;
                        }
                        valid_len += ((qv->num_vectors - 1) *
                                sizeof(struct virtchnl_iwarp_qv_info));
                }
                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;
                        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;
                        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;
                        valid_len += (vti->num_tc - 1) *
                                     sizeof(struct virtchnl_channel_info);
                        if (vti->num_tc == 0)
                                err_msg_format = true;
                }
                break;
        case VIRTCHNL_OP_DISABLE_CHANNELS:
                break;
        case VIRTCHNL_OP_ADD_CLOUD_FILTER:
                valid_len = sizeof(struct virtchnl_filter);
                break;
        case VIRTCHNL_OP_DEL_CLOUD_FILTER:
                valid_len = sizeof(struct virtchnl_filter);
                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;
        /* 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_ */