/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
 * Copyright (c) 2004, 2020 Intel Corporation.  All rights reserved.
 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
 * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
 */

#ifndef IB_VERBS_H
#define IB_VERBS_H

#include <linux/ethtool.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/rwsem.h>
#include <linux/workqueue.h>
#include <linux/irq_poll.h>
#include <uapi/linux/if_ether.h>
#include <net/ipv6.h>
#include <net/ip.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/refcount.h>
#include <linux/if_link.h>
#include <linux/atomic.h>
#include <linux/mmu_notifier.h>
#include <linux/uaccess.h>
#include <linux/cgroup_rdma.h>
#include <linux/irqflags.h>
#include <linux/preempt.h>
#include <linux/dim.h>
#include <uapi/rdma/ib_user_verbs.h>
#include <rdma/rdma_counter.h>
#include <rdma/restrack.h>
#include <rdma/signature.h>
#include <uapi/rdma/rdma_user_ioctl.h>
#include <uapi/rdma/ib_user_ioctl_verbs.h>

#define IB_FW_VERSION_NAME_MAX  ETHTOOL_FWVERS_LEN

struct ib_umem_odp;
struct ib_uqp_object;
struct ib_usrq_object;
struct ib_uwq_object;
struct rdma_cm_id;
struct ib_port;
struct hw_stats_device_data;

extern struct workqueue_struct *ib_wq;
extern struct workqueue_struct *ib_comp_wq;
extern struct workqueue_struct *ib_comp_unbound_wq;

struct ib_ucq_object;

__printf(3, 4) __cold
void ibdev_printk(const char *level, const struct ib_device *ibdev,
                  const char *format, ...);
__printf(2, 3) __cold
void ibdev_emerg(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_alert(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_crit(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_err(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_warn(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_notice(const struct ib_device *ibdev, const char *format, ...);
__printf(2, 3) __cold
void ibdev_info(const struct ib_device *ibdev, const char *format, ...);

#if defined(CONFIG_DYNAMIC_DEBUG) || \
        (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
#define ibdev_dbg(__dev, format, args...)                       \
        dynamic_ibdev_dbg(__dev, format, ##args)
#else
__printf(2, 3) __cold
static inline
void ibdev_dbg(const struct ib_device *ibdev, const char *format, ...) {}
#endif

#define ibdev_level_ratelimited(ibdev_level, ibdev, fmt, ...)           \
do {                                                                    \
        static DEFINE_RATELIMIT_STATE(_rs,                              \
                                      DEFAULT_RATELIMIT_INTERVAL,       \
                                      DEFAULT_RATELIMIT_BURST);         \
        if (__ratelimit(&_rs))                                          \
                ibdev_level(ibdev, fmt, ##__VA_ARGS__);                 \
} while (0)

#define ibdev_emerg_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_emerg, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_alert_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_alert, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_crit_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_crit, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_err_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_err, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_warn_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_warn, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_notice_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_notice, ibdev, fmt, ##__VA_ARGS__)
#define ibdev_info_ratelimited(ibdev, fmt, ...) \
        ibdev_level_ratelimited(ibdev_info, ibdev, fmt, ##__VA_ARGS__)

#if defined(CONFIG_DYNAMIC_DEBUG) || \
        (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
/* descriptor check is first to prevent flooding with "callbacks suppressed" */
#define ibdev_dbg_ratelimited(ibdev, fmt, ...)                          \
do {                                                                    \
        static DEFINE_RATELIMIT_STATE(_rs,                              \
                                      DEFAULT_RATELIMIT_INTERVAL,       \
                                      DEFAULT_RATELIMIT_BURST);         \
        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
        if (DYNAMIC_DEBUG_BRANCH(descriptor) && __ratelimit(&_rs))      \
                __dynamic_ibdev_dbg(&descriptor, ibdev, fmt,            \
                                    ##__VA_ARGS__);                     \
} while (0)
#else
__printf(2, 3) __cold
static inline
void ibdev_dbg_ratelimited(const struct ib_device *ibdev, const char *format, ...) {}
#endif

union ib_gid {
        u8      raw[16];
        struct {
                __be64  subnet_prefix;
                __be64  interface_id;
        } global;
};

extern union ib_gid zgid;

enum ib_gid_type {
        IB_GID_TYPE_IB = IB_UVERBS_GID_TYPE_IB,
        IB_GID_TYPE_ROCE = IB_UVERBS_GID_TYPE_ROCE_V1,
        IB_GID_TYPE_ROCE_UDP_ENCAP = IB_UVERBS_GID_TYPE_ROCE_V2,
        IB_GID_TYPE_SIZE
};

#define ROCE_V2_UDP_DPORT      4791
struct ib_gid_attr {
        struct net_device __rcu *ndev;
        struct ib_device        *device;
        union ib_gid            gid;
        enum ib_gid_type        gid_type;
        u16                     index;
        u32                     port_num;
};

enum {
        /* set the local administered indication */
        IB_SA_WELL_KNOWN_GUID   = BIT_ULL(57) | 2,
};

enum rdma_transport_type {
        RDMA_TRANSPORT_IB,
        RDMA_TRANSPORT_IWARP,
        RDMA_TRANSPORT_USNIC,
        RDMA_TRANSPORT_USNIC_UDP,
        RDMA_TRANSPORT_UNSPECIFIED,
};

enum rdma_protocol_type {
        RDMA_PROTOCOL_IB,
        RDMA_PROTOCOL_IBOE,
        RDMA_PROTOCOL_IWARP,
        RDMA_PROTOCOL_USNIC_UDP
};

__attribute_const__ enum rdma_transport_type
rdma_node_get_transport(unsigned int node_type);

enum rdma_network_type {
        RDMA_NETWORK_IB,
        RDMA_NETWORK_ROCE_V1,
        RDMA_NETWORK_IPV4,
        RDMA_NETWORK_IPV6
};

static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type)
{
        if (network_type == RDMA_NETWORK_IPV4 ||
            network_type == RDMA_NETWORK_IPV6)
                return IB_GID_TYPE_ROCE_UDP_ENCAP;
        else if (network_type == RDMA_NETWORK_ROCE_V1)
                return IB_GID_TYPE_ROCE;
        else
                return IB_GID_TYPE_IB;
}

static inline enum rdma_network_type
rdma_gid_attr_network_type(const struct ib_gid_attr *attr)
{
        if (attr->gid_type == IB_GID_TYPE_IB)
                return RDMA_NETWORK_IB;

        if (attr->gid_type == IB_GID_TYPE_ROCE)
                return RDMA_NETWORK_ROCE_V1;

        if (ipv6_addr_v4mapped((struct in6_addr *)&attr->gid))
                return RDMA_NETWORK_IPV4;
        else
                return RDMA_NETWORK_IPV6;
}

enum rdma_link_layer {
        IB_LINK_LAYER_UNSPECIFIED,
        IB_LINK_LAYER_INFINIBAND,
        IB_LINK_LAYER_ETHERNET,
};

enum ib_device_cap_flags {
        IB_DEVICE_RESIZE_MAX_WR                 = (1 << 0),
        IB_DEVICE_BAD_PKEY_CNTR                 = (1 << 1),
        IB_DEVICE_BAD_QKEY_CNTR                 = (1 << 2),
        IB_DEVICE_RAW_MULTI                     = (1 << 3),
        IB_DEVICE_AUTO_PATH_MIG                 = (1 << 4),
        IB_DEVICE_CHANGE_PHY_PORT               = (1 << 5),
        IB_DEVICE_UD_AV_PORT_ENFORCE            = (1 << 6),
        IB_DEVICE_CURR_QP_STATE_MOD             = (1 << 7),
        IB_DEVICE_SHUTDOWN_PORT                 = (1 << 8),
        /* Not in use, former INIT_TYPE         = (1 << 9),*/
        IB_DEVICE_PORT_ACTIVE_EVENT             = (1 << 10),
        IB_DEVICE_SYS_IMAGE_GUID                = (1 << 11),
        IB_DEVICE_RC_RNR_NAK_GEN                = (1 << 12),
        IB_DEVICE_SRQ_RESIZE                    = (1 << 13),
        IB_DEVICE_N_NOTIFY_CQ                   = (1 << 14),

        /*
         * This device supports a per-device lkey or stag that can be
         * used without performing a memory registration for the local
         * memory.  Note that ULPs should never check this flag, but
         * instead of use the local_dma_lkey flag in the ib_pd structure,
         * which will always contain a usable lkey.
         */
        IB_DEVICE_LOCAL_DMA_LKEY                = (1 << 15),
        /* Reserved, old SEND_W_INV             = (1 << 16),*/
        IB_DEVICE_MEM_WINDOW                    = (1 << 17),
        /*
         * Devices should set IB_DEVICE_UD_IP_SUM if they support
         * insertion of UDP and TCP checksum on outgoing UD IPoIB
         * messages and can verify the validity of checksum for
         * incoming messages.  Setting this flag implies that the
         * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
         */
        IB_DEVICE_UD_IP_CSUM                    = (1 << 18),
        IB_DEVICE_UD_TSO                        = (1 << 19),
        IB_DEVICE_XRC                           = (1 << 20),

        /*
         * This device supports the IB "base memory management extension",
         * which includes support for fast registrations (IB_WR_REG_MR,
         * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs).  This flag should
         * also be set by any iWarp device which must support FRs to comply
         * to the iWarp verbs spec.  iWarp devices also support the
         * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the
         * stag.
         */
        IB_DEVICE_MEM_MGT_EXTENSIONS            = (1 << 21),
        IB_DEVICE_BLOCK_MULTICAST_LOOPBACK      = (1 << 22),
        IB_DEVICE_MEM_WINDOW_TYPE_2A            = (1 << 23),
        IB_DEVICE_MEM_WINDOW_TYPE_2B            = (1 << 24),
        IB_DEVICE_RC_IP_CSUM                    = (1 << 25),
        /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */
        IB_DEVICE_RAW_IP_CSUM                   = (1 << 26),
        /*
         * Devices should set IB_DEVICE_CROSS_CHANNEL if they
         * support execution of WQEs that involve synchronization
         * of I/O operations with single completion queue managed
         * by hardware.
         */
        IB_DEVICE_CROSS_CHANNEL                 = (1 << 27),
        IB_DEVICE_MANAGED_FLOW_STEERING         = (1 << 29),
        IB_DEVICE_INTEGRITY_HANDOVER            = (1 << 30),
        IB_DEVICE_ON_DEMAND_PAGING              = (1ULL << 31),
        IB_DEVICE_SG_GAPS_REG                   = (1ULL << 32),
        IB_DEVICE_VIRTUAL_FUNCTION              = (1ULL << 33),
        /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */
        IB_DEVICE_RAW_SCATTER_FCS               = (1ULL << 34),
        IB_DEVICE_RDMA_NETDEV_OPA               = (1ULL << 35),
        /* The device supports padding incoming writes to cacheline. */
        IB_DEVICE_PCI_WRITE_END_PADDING         = (1ULL << 36),
        IB_DEVICE_ALLOW_USER_UNREG              = (1ULL << 37),
};

enum ib_atomic_cap {
        IB_ATOMIC_NONE,
        IB_ATOMIC_HCA,
        IB_ATOMIC_GLOB
};

enum ib_odp_general_cap_bits {
        IB_ODP_SUPPORT          = 1 << 0,
        IB_ODP_SUPPORT_IMPLICIT = 1 << 1,
};

enum ib_odp_transport_cap_bits {
        IB_ODP_SUPPORT_SEND     = 1 << 0,
        IB_ODP_SUPPORT_RECV     = 1 << 1,
        IB_ODP_SUPPORT_WRITE    = 1 << 2,
        IB_ODP_SUPPORT_READ     = 1 << 3,
        IB_ODP_SUPPORT_ATOMIC   = 1 << 4,
        IB_ODP_SUPPORT_SRQ_RECV = 1 << 5,
};

struct ib_odp_caps {
        uint64_t general_caps;
        struct {
                uint32_t  rc_odp_caps;
                uint32_t  uc_odp_caps;
                uint32_t  ud_odp_caps;
                uint32_t  xrc_odp_caps;
        } per_transport_caps;
};

struct ib_rss_caps {
        /* Corresponding bit will be set if qp type from
         * 'enum ib_qp_type' is supported, e.g.
         * supported_qpts |= 1 << IB_QPT_UD
         */
        u32 supported_qpts;
        u32 max_rwq_indirection_tables;
        u32 max_rwq_indirection_table_size;
};

enum ib_tm_cap_flags {
        /*  Support tag matching with rendezvous offload for RC transport */
        IB_TM_CAP_RNDV_RC = 1 << 0,
};

struct ib_tm_caps {
        /* Max size of RNDV header */
        u32 max_rndv_hdr_size;
        /* Max number of entries in tag matching list */
        u32 max_num_tags;
        /* From enum ib_tm_cap_flags */
        u32 flags;
        /* Max number of outstanding list operations */
        u32 max_ops;
        /* Max number of SGE in tag matching entry */
        u32 max_sge;
};

struct ib_cq_init_attr {
        unsigned int    cqe;
        u32             comp_vector;
        u32             flags;
};

enum ib_cq_attr_mask {
        IB_CQ_MODERATE = 1 << 0,
};

struct ib_cq_caps {
        u16     max_cq_moderation_count;
        u16     max_cq_moderation_period;
};

struct ib_dm_mr_attr {
        u64             length;
        u64             offset;
        u32             access_flags;
};

struct ib_dm_alloc_attr {
        u64     length;
        u32     alignment;
        u32     flags;
};

struct ib_device_attr {
        u64                     fw_ver;
        __be64                  sys_image_guid;
        u64                     max_mr_size;
        u64                     page_size_cap;
        u32                     vendor_id;
        u32                     vendor_part_id;
        u32                     hw_ver;
        int                     max_qp;
        int                     max_qp_wr;
        u64                     device_cap_flags;
        int                     max_send_sge;
        int                     max_recv_sge;
        int                     max_sge_rd;
        int                     max_cq;
        int                     max_cqe;
        int                     max_mr;
        int                     max_pd;
        int                     max_qp_rd_atom;
        int                     max_ee_rd_atom;
        int                     max_res_rd_atom;
        int                     max_qp_init_rd_atom;
        int                     max_ee_init_rd_atom;
        enum ib_atomic_cap      atomic_cap;
        enum ib_atomic_cap      masked_atomic_cap;
        int                     max_ee;
        int                     max_rdd;
        int                     max_mw;
        int                     max_raw_ipv6_qp;
        int                     max_raw_ethy_qp;
        int                     max_mcast_grp;
        int                     max_mcast_qp_attach;
        int                     max_total_mcast_qp_attach;
        int                     max_ah;
        int                     max_srq;
        int                     max_srq_wr;
        int                     max_srq_sge;
        unsigned int            max_fast_reg_page_list_len;
        unsigned int            max_pi_fast_reg_page_list_len;
        u16                     max_pkeys;
        u8                      local_ca_ack_delay;
        int                     sig_prot_cap;
        int                     sig_guard_cap;
        struct ib_odp_caps      odp_caps;
        uint64_t                timestamp_mask;
        uint64_t                hca_core_clock; /* in KHZ */
        struct ib_rss_caps      rss_caps;
        u32                     max_wq_type_rq;
        u32                     raw_packet_caps; /* Use ib_raw_packet_caps enum */
        struct ib_tm_caps       tm_caps;
        struct ib_cq_caps       cq_caps;
        u64                     max_dm_size;
        /* Max entries for sgl for optimized performance per READ */
        u32                     max_sgl_rd;
};

enum ib_mtu {
        IB_MTU_256  = 1,
        IB_MTU_512  = 2,
        IB_MTU_1024 = 3,
        IB_MTU_2048 = 4,
        IB_MTU_4096 = 5
};

enum opa_mtu {
        OPA_MTU_8192 = 6,
        OPA_MTU_10240 = 7
};

static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
{
        switch (mtu) {
        case IB_MTU_256:  return  256;
        case IB_MTU_512:  return  512;
        case IB_MTU_1024: return 1024;
        case IB_MTU_2048: return 2048;
        case IB_MTU_4096: return 4096;
        default:          return -1;
        }
}

static inline enum ib_mtu ib_mtu_int_to_enum(int mtu)
{
        if (mtu >= 4096)
                return IB_MTU_4096;
        else if (mtu >= 2048)
                return IB_MTU_2048;
        else if (mtu >= 1024)
                return IB_MTU_1024;
        else if (mtu >= 512)
                return IB_MTU_512;
        else
                return IB_MTU_256;
}

static inline int opa_mtu_enum_to_int(enum opa_mtu mtu)
{
        switch (mtu) {
        case OPA_MTU_8192:
                return 8192;
        case OPA_MTU_10240:
                return 10240;
        default:
                return(ib_mtu_enum_to_int((enum ib_mtu)mtu));
        }
}

static inline enum opa_mtu opa_mtu_int_to_enum(int mtu)
{
        if (mtu >= 10240)
                return OPA_MTU_10240;
        else if (mtu >= 8192)
                return OPA_MTU_8192;
        else
                return ((enum opa_mtu)ib_mtu_int_to_enum(mtu));
}

enum ib_port_state {
        IB_PORT_NOP             = 0,
        IB_PORT_DOWN            = 1,
        IB_PORT_INIT            = 2,
        IB_PORT_ARMED           = 3,
        IB_PORT_ACTIVE          = 4,
        IB_PORT_ACTIVE_DEFER    = 5
};

enum ib_port_phys_state {
        IB_PORT_PHYS_STATE_SLEEP = 1,
        IB_PORT_PHYS_STATE_POLLING = 2,
        IB_PORT_PHYS_STATE_DISABLED = 3,
        IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING = 4,
        IB_PORT_PHYS_STATE_LINK_UP = 5,
        IB_PORT_PHYS_STATE_LINK_ERROR_RECOVERY = 6,
        IB_PORT_PHYS_STATE_PHY_TEST = 7,
};

enum ib_port_width {
        IB_WIDTH_1X     = 1,
        IB_WIDTH_2X     = 16,
        IB_WIDTH_4X     = 2,
        IB_WIDTH_8X     = 4,
        IB_WIDTH_12X    = 8
};

static inline int ib_width_enum_to_int(enum ib_port_width width)
{
        switch (width) {
        case IB_WIDTH_1X:  return  1;
        case IB_WIDTH_2X:  return  2;
        case IB_WIDTH_4X:  return  4;
        case IB_WIDTH_8X:  return  8;
        case IB_WIDTH_12X: return 12;
        default:          return -1;
        }
}

enum ib_port_speed {
        IB_SPEED_SDR    = 1,
        IB_SPEED_DDR    = 2,
        IB_SPEED_QDR    = 4,
        IB_SPEED_FDR10  = 8,
        IB_SPEED_FDR    = 16,
        IB_SPEED_EDR    = 32,
        IB_SPEED_HDR    = 64,
        IB_SPEED_NDR    = 128,
};

/**
 * struct rdma_hw_stats
 * @lock - Mutex to protect parallel write access to lifespan and values
 *    of counters, which are 64bits and not guaranteeed to be written
 *    atomicaly on 32bits systems.
 * @timestamp - Used by the core code to track when the last update was
 * @lifespan - Used by the core code to determine how old the counters
 *   should be before being updated again.  Stored in jiffies, defaults
 *   to 10 milliseconds, drivers can override the default be specifying
 *   their own value during their allocation routine.
 * @name - Array of pointers to static names used for the counters in
 *   directory.
 * @num_counters - How many hardware counters there are.  If name is
 *   shorter than this number, a kernel oops will result.  Driver authors
 *   are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters)
 *   in their code to prevent this.
 * @value - Array of u64 counters that are accessed by the sysfs code and
 *   filled in by the drivers get_stats routine
 */
struct rdma_hw_stats {
        struct mutex    lock; /* Protect lifespan and values[] */
        unsigned long   timestamp;
        unsigned long   lifespan;
        const char * const *names;
        int             num_counters;
        u64             value[];
};

#define RDMA_HW_STATS_DEFAULT_LIFESPAN 10
/**
 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct
 *   for drivers.
 * @names - Array of static const char *
 * @num_counters - How many elements in array
 * @lifespan - How many milliseconds between updates
 */
static inline struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
                const char * const *names, int num_counters,
                unsigned long lifespan)
{
        struct rdma_hw_stats *stats;

        stats = kzalloc(sizeof(*stats) + num_counters * sizeof(u64),
                        GFP_KERNEL);
        if (!stats)
                return NULL;
        stats->names = names;
        stats->num_counters = num_counters;
        stats->lifespan = msecs_to_jiffies(lifespan);

        return stats;
}


/* Define bits for the various functionality this port needs to be supported by
 * the core.
 */
/* Management                           0x00000FFF */
#define RDMA_CORE_CAP_IB_MAD            0x00000001
#define RDMA_CORE_CAP_IB_SMI            0x00000002
#define RDMA_CORE_CAP_IB_CM             0x00000004
#define RDMA_CORE_CAP_IW_CM             0x00000008
#define RDMA_CORE_CAP_IB_SA             0x00000010
#define RDMA_CORE_CAP_OPA_MAD           0x00000020

/* Address format                       0x000FF000 */
#define RDMA_CORE_CAP_AF_IB             0x00001000
#define RDMA_CORE_CAP_ETH_AH            0x00002000
#define RDMA_CORE_CAP_OPA_AH            0x00004000
#define RDMA_CORE_CAP_IB_GRH_REQUIRED   0x00008000

/* Protocol                             0xFFF00000 */
#define RDMA_CORE_CAP_PROT_IB           0x00100000
#define RDMA_CORE_CAP_PROT_ROCE         0x00200000
#define RDMA_CORE_CAP_PROT_IWARP        0x00400000
#define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000
#define RDMA_CORE_CAP_PROT_RAW_PACKET   0x01000000
#define RDMA_CORE_CAP_PROT_USNIC        0x02000000

#define RDMA_CORE_PORT_IB_GRH_REQUIRED (RDMA_CORE_CAP_IB_GRH_REQUIRED \
                                        | RDMA_CORE_CAP_PROT_ROCE     \
                                        | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP)

#define RDMA_CORE_PORT_IBA_IB          (RDMA_CORE_CAP_PROT_IB  \
                                        | RDMA_CORE_CAP_IB_MAD \
                                        | RDMA_CORE_CAP_IB_SMI \
                                        | RDMA_CORE_CAP_IB_CM  \
                                        | RDMA_CORE_CAP_IB_SA  \
                                        | RDMA_CORE_CAP_AF_IB)
#define RDMA_CORE_PORT_IBA_ROCE        (RDMA_CORE_CAP_PROT_ROCE \
                                        | RDMA_CORE_CAP_IB_MAD  \
                                        | RDMA_CORE_CAP_IB_CM   \
                                        | RDMA_CORE_CAP_AF_IB   \
                                        | RDMA_CORE_CAP_ETH_AH)
#define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP                       \
                                        (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \
                                        | RDMA_CORE_CAP_IB_MAD  \
                                        | RDMA_CORE_CAP_IB_CM   \
                                        | RDMA_CORE_CAP_AF_IB   \
                                        | RDMA_CORE_CAP_ETH_AH)
#define RDMA_CORE_PORT_IWARP           (RDMA_CORE_CAP_PROT_IWARP \
                                        | RDMA_CORE_CAP_IW_CM)
#define RDMA_CORE_PORT_INTEL_OPA       (RDMA_CORE_PORT_IBA_IB  \
                                        | RDMA_CORE_CAP_OPA_MAD)

#define RDMA_CORE_PORT_RAW_PACKET       (RDMA_CORE_CAP_PROT_RAW_PACKET)

#define RDMA_CORE_PORT_USNIC            (RDMA_CORE_CAP_PROT_USNIC)

struct ib_port_attr {
        u64                     subnet_prefix;
        enum ib_port_state      state;
        enum ib_mtu             max_mtu;
        enum ib_mtu             active_mtu;
        u32                     phys_mtu;
        int                     gid_tbl_len;
        unsigned int            ip_gids:1;
        /* This is the value from PortInfo CapabilityMask, defined by IBA */
        u32                     port_cap_flags;
        u32                     max_msg_sz;
        u32                     bad_pkey_cntr;
        u32                     qkey_viol_cntr;
        u16                     pkey_tbl_len;
        u32                     sm_lid;
        u32                     lid;
        u8                      lmc;
        u8                      max_vl_num;
        u8                      sm_sl;
        u8                      subnet_timeout;
        u8                      init_type_reply;
        u8                      active_width;
        u16                     active_speed;
        u8                      phys_state;
        u16                     port_cap_flags2;
};

enum ib_device_modify_flags {
        IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
        IB_DEVICE_MODIFY_NODE_DESC      = 1 << 1
};

#define IB_DEVICE_NODE_DESC_MAX 64

struct ib_device_modify {
        u64     sys_image_guid;
        char    node_desc[IB_DEVICE_NODE_DESC_MAX];
};

enum ib_port_modify_flags {
        IB_PORT_SHUTDOWN                = 1,
        IB_PORT_INIT_TYPE               = (1<<2),
        IB_PORT_RESET_QKEY_CNTR         = (1<<3),
        IB_PORT_OPA_MASK_CHG            = (1<<4)
};

struct ib_port_modify {
        u32     set_port_cap_mask;
        u32     clr_port_cap_mask;
        u8      init_type;
};

enum ib_event_type {
        IB_EVENT_CQ_ERR,
        IB_EVENT_QP_FATAL,
        IB_EVENT_QP_REQ_ERR,
        IB_EVENT_QP_ACCESS_ERR,
        IB_EVENT_COMM_EST,
        IB_EVENT_SQ_DRAINED,
        IB_EVENT_PATH_MIG,
        IB_EVENT_PATH_MIG_ERR,
        IB_EVENT_DEVICE_FATAL,
        IB_EVENT_PORT_ACTIVE,
        IB_EVENT_PORT_ERR,
        IB_EVENT_LID_CHANGE,
        IB_EVENT_PKEY_CHANGE,
        IB_EVENT_SM_CHANGE,
        IB_EVENT_SRQ_ERR,
        IB_EVENT_SRQ_LIMIT_REACHED,
        IB_EVENT_QP_LAST_WQE_REACHED,
        IB_EVENT_CLIENT_REREGISTER,
        IB_EVENT_GID_CHANGE,
        IB_EVENT_WQ_FATAL,
};

const char *__attribute_const__ ib_event_msg(enum ib_event_type event);

struct ib_event {
        struct ib_device        *device;
        union {
                struct ib_cq    *cq;
                struct ib_qp    *qp;
                struct ib_srq   *srq;
                struct ib_wq    *wq;
                u32             port_num;
        } element;
        enum ib_event_type      event;
};

struct ib_event_handler {
        struct ib_device *device;
        void            (*handler)(struct ib_event_handler *, struct ib_event *);
        struct list_head  list;
};

#define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler)          \
        do {                                                    \
                (_ptr)->device  = _device;                      \
                (_ptr)->handler = _handler;                     \
                INIT_LIST_HEAD(&(_ptr)->list);                  \
        } while (0)

struct ib_global_route {
        const struct ib_gid_attr *sgid_attr;
        union ib_gid    dgid;
        u32             flow_label;
        u8              sgid_index;
        u8              hop_limit;
        u8              traffic_class;
};

struct ib_grh {
        __be32          version_tclass_flow;
        __be16          paylen;
        u8              next_hdr;
        u8              hop_limit;
        union ib_gid    sgid;
        union ib_gid    dgid;
};

union rdma_network_hdr {
        struct ib_grh ibgrh;
        struct {
                /* The IB spec states that if it's IPv4, the header
                 * is located in the last 20 bytes of the header.
                 */
                u8              reserved[20];
                struct iphdr    roce4grh;
        };
};

#define IB_QPN_MASK             0xFFFFFF

enum {
        IB_MULTICAST_QPN = 0xffffff
};

#define IB_LID_PERMISSIVE       cpu_to_be16(0xFFFF)
#define IB_MULTICAST_LID_BASE   cpu_to_be16(0xC000)

enum ib_ah_flags {
        IB_AH_GRH       = 1
};

enum ib_rate {
        IB_RATE_PORT_CURRENT = 0,
        IB_RATE_2_5_GBPS = 2,
        IB_RATE_5_GBPS   = 5,
        IB_RATE_10_GBPS  = 3,
        IB_RATE_20_GBPS  = 6,
        IB_RATE_30_GBPS  = 4,
        IB_RATE_40_GBPS  = 7,
        IB_RATE_60_GBPS  = 8,
        IB_RATE_80_GBPS  = 9,
        IB_RATE_120_GBPS = 10,
        IB_RATE_14_GBPS  = 11,
        IB_RATE_56_GBPS  = 12,
        IB_RATE_112_GBPS = 13,
        IB_RATE_168_GBPS = 14,
        IB_RATE_25_GBPS  = 15,
        IB_RATE_100_GBPS = 16,
        IB_RATE_200_GBPS = 17,
        IB_RATE_300_GBPS = 18,
        IB_RATE_28_GBPS  = 19,
        IB_RATE_50_GBPS  = 20,
        IB_RATE_400_GBPS = 21,
        IB_RATE_600_GBPS = 22,
};

/**
 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
 * base rate of 2.5 Gbit/sec.  For example, IB_RATE_5_GBPS will be
 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
 * @rate: rate to convert.
 */
__attribute_const__ int ib_rate_to_mult(enum ib_rate rate);

/**
 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
 * @rate: rate to convert.
 */
__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);


/**
 * enum ib_mr_type - memory region type
 * @IB_MR_TYPE_MEM_REG:       memory region that is used for
 *                            normal registration
 * @IB_MR_TYPE_SG_GAPS:       memory region that is capable to
 *                            register any arbitrary sg lists (without
 *                            the normal mr constraints - see
 *                            ib_map_mr_sg)
 * @IB_MR_TYPE_DM:            memory region that is used for device
 *                            memory registration
 * @IB_MR_TYPE_USER:          memory region that is used for the user-space
 *                            application
 * @IB_MR_TYPE_DMA:           memory region that is used for DMA operations
 *                            without address translations (VA=PA)
 * @IB_MR_TYPE_INTEGRITY:     memory region that is used for
 *                            data integrity operations
 */
enum ib_mr_type {
        IB_MR_TYPE_MEM_REG,
        IB_MR_TYPE_SG_GAPS,
        IB_MR_TYPE_DM,
        IB_MR_TYPE_USER,
        IB_MR_TYPE_DMA,
        IB_MR_TYPE_INTEGRITY,
};

enum ib_mr_status_check {
        IB_MR_CHECK_SIG_STATUS = 1,
};

/**
 * struct ib_mr_status - Memory region status container
 *
 * @fail_status: Bitmask of MR checks status. For each
 *     failed check a corresponding status bit is set.
 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
 *     failure.
 */
struct ib_mr_status {
        u32                 fail_status;
        struct ib_sig_err   sig_err;
};

/**
 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
 * enum.
 * @mult: multiple to convert.
 */
__attribute_const__ enum ib_rate mult_to_ib_rate(int mult);

struct rdma_ah_init_attr {
        struct rdma_ah_attr *ah_attr;
        u32 flags;
        struct net_device *xmit_slave;
};

enum rdma_ah_attr_type {
        RDMA_AH_ATTR_TYPE_UNDEFINED,
        RDMA_AH_ATTR_TYPE_IB,
        RDMA_AH_ATTR_TYPE_ROCE,
        RDMA_AH_ATTR_TYPE_OPA,
};

struct ib_ah_attr {
        u16                     dlid;
        u8                      src_path_bits;
};

struct roce_ah_attr {
        u8                      dmac[ETH_ALEN];
};

struct opa_ah_attr {
        u32                     dlid;
        u8                      src_path_bits;
        bool                    make_grd;
};

struct rdma_ah_attr {
        struct ib_global_route  grh;
        u8                      sl;
        u8                      static_rate;
        u32                     port_num;
        u8                      ah_flags;
        enum rdma_ah_attr_type type;
        union {
                struct ib_ah_attr ib;
                struct roce_ah_attr roce;
                struct opa_ah_attr opa;
        };
};

enum ib_wc_status {
        IB_WC_SUCCESS,
        IB_WC_LOC_LEN_ERR,
        IB_WC_LOC_QP_OP_ERR,
        IB_WC_LOC_EEC_OP_ERR,
        IB_WC_LOC_PROT_ERR,
        IB_WC_WR_FLUSH_ERR,
        IB_WC_MW_BIND_ERR,
        IB_WC_BAD_RESP_ERR,
        IB_WC_LOC_ACCESS_ERR,
        IB_WC_REM_INV_REQ_ERR,
        IB_WC_REM_ACCESS_ERR,
        IB_WC_REM_OP_ERR,
        IB_WC_RETRY_EXC_ERR,
        IB_WC_RNR_RETRY_EXC_ERR,
        IB_WC_LOC_RDD_VIOL_ERR,
        IB_WC_REM_INV_RD_REQ_ERR,
        IB_WC_REM_ABORT_ERR,
        IB_WC_INV_EECN_ERR,
        IB_WC_INV_EEC_STATE_ERR,
        IB_WC_FATAL_ERR,
        IB_WC_RESP_TIMEOUT_ERR,
        IB_WC_GENERAL_ERR
};

const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status);

enum ib_wc_opcode {
        IB_WC_SEND = IB_UVERBS_WC_SEND,
        IB_WC_RDMA_WRITE = IB_UVERBS_WC_RDMA_WRITE,
        IB_WC_RDMA_READ = IB_UVERBS_WC_RDMA_READ,
        IB_WC_COMP_SWAP = IB_UVERBS_WC_COMP_SWAP,
        IB_WC_FETCH_ADD = IB_UVERBS_WC_FETCH_ADD,
        IB_WC_BIND_MW = IB_UVERBS_WC_BIND_MW,
        IB_WC_LOCAL_INV = IB_UVERBS_WC_LOCAL_INV,
        IB_WC_LSO = IB_UVERBS_WC_TSO,
        IB_WC_REG_MR,
        IB_WC_MASKED_COMP_SWAP,
        IB_WC_MASKED_FETCH_ADD,
/*
 * Set value of IB_WC_RECV so consumers can test if a completion is a
 * receive by testing (opcode & IB_WC_RECV).
 */
        IB_WC_RECV                      = 1 << 7,
        IB_WC_RECV_RDMA_WITH_IMM
};

enum ib_wc_flags {
        IB_WC_GRH               = 1,
        IB_WC_WITH_IMM          = (1<<1),
        IB_WC_WITH_INVALIDATE   = (1<<2),
        IB_WC_IP_CSUM_OK        = (1<<3),
        IB_WC_WITH_SMAC         = (1<<4),
        IB_WC_WITH_VLAN         = (1<<5),
        IB_WC_WITH_NETWORK_HDR_TYPE     = (1<<6),
};

struct ib_wc {
        union {
                u64             wr_id;
                struct ib_cqe   *wr_cqe;
        };
        enum ib_wc_status       status;
        enum ib_wc_opcode       opcode;
        u32                     vendor_err;
        u32                     byte_len;
        struct ib_qp           *qp;

        union {
                __be32          imm_data;
                u32             invalidate_rkey;
        } ex;
        u32                     src_qp;
        u32                     slid;
        int                     wc_flags;
        u16                     pkey_index;
        u8                      sl;
        u8                      dlid_path_bits;
        u32 port_num; /* valid only for DR SMPs on switches */
        u8                      smac[ETH_ALEN];
        u16                     vlan_id;
        u8                      network_hdr_type;
};

enum ib_cq_notify_flags {
        IB_CQ_SOLICITED                 = 1 << 0,
        IB_CQ_NEXT_COMP                 = 1 << 1,
        IB_CQ_SOLICITED_MASK            = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
        IB_CQ_REPORT_MISSED_EVENTS      = 1 << 2,
};

enum ib_srq_type {
        IB_SRQT_BASIC = IB_UVERBS_SRQT_BASIC,
        IB_SRQT_XRC = IB_UVERBS_SRQT_XRC,
        IB_SRQT_TM = IB_UVERBS_SRQT_TM,
};

static inline bool ib_srq_has_cq(enum ib_srq_type srq_type)
{
        return srq_type == IB_SRQT_XRC ||
               srq_type == IB_SRQT_TM;
}

enum ib_srq_attr_mask {
        IB_SRQ_MAX_WR   = 1 << 0,
        IB_SRQ_LIMIT    = 1 << 1,
};

struct ib_srq_attr {
        u32     max_wr;
        u32     max_sge;
        u32     srq_limit;
};

struct ib_srq_init_attr {
        void                  (*event_handler)(struct ib_event *, void *);
        void                   *srq_context;
        struct ib_srq_attr      attr;
        enum ib_srq_type        srq_type;

        struct {
                struct ib_cq   *cq;
                union {
                        struct {
                                struct ib_xrcd *xrcd;
                        } xrc;

                        struct {
                                u32             max_num_tags;
                        } tag_matching;
                };
        } ext;
};

struct ib_qp_cap {
        u32     max_send_wr;
        u32     max_recv_wr;
        u32     max_send_sge;
        u32     max_recv_sge;
        u32     max_inline_data;

        /*
         * Maximum number of rdma_rw_ctx structures in flight at a time.
         * ib_create_qp() will calculate the right amount of neededed WRs
         * and MRs based on this.
         */
        u32     max_rdma_ctxs;
};

enum ib_sig_type {
        IB_SIGNAL_ALL_WR,
        IB_SIGNAL_REQ_WR
};

enum ib_qp_type {
        /*
         * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
         * here (and in that order) since the MAD layer uses them as
         * indices into a 2-entry table.
         */
        IB_QPT_SMI,
        IB_QPT_GSI,

        IB_QPT_RC = IB_UVERBS_QPT_RC,
        IB_QPT_UC = IB_UVERBS_QPT_UC,
        IB_QPT_UD = IB_UVERBS_QPT_UD,
        IB_QPT_RAW_IPV6,
        IB_QPT_RAW_ETHERTYPE,
        IB_QPT_RAW_PACKET = IB_UVERBS_QPT_RAW_PACKET,
        IB_QPT_XRC_INI = IB_UVERBS_QPT_XRC_INI,
        IB_QPT_XRC_TGT = IB_UVERBS_QPT_XRC_TGT,
        IB_QPT_MAX,
        IB_QPT_DRIVER = IB_UVERBS_QPT_DRIVER,
        /* Reserve a range for qp types internal to the low level driver.
         * These qp types will not be visible at the IB core layer, so the
         * IB_QPT_MAX usages should not be affected in the core layer
         */
        IB_QPT_RESERVED1 = 0x1000,
        IB_QPT_RESERVED2,
        IB_QPT_RESERVED3,
        IB_QPT_RESERVED4,
        IB_QPT_RESERVED5,
        IB_QPT_RESERVED6,
        IB_QPT_RESERVED7,
        IB_QPT_RESERVED8,
        IB_QPT_RESERVED9,
        IB_QPT_RESERVED10,
};

enum ib_qp_create_flags {
        IB_QP_CREATE_IPOIB_UD_LSO               = 1 << 0,
        IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK   =
                IB_UVERBS_QP_CREATE_BLOCK_MULTICAST_LOOPBACK,
        IB_QP_CREATE_CROSS_CHANNEL              = 1 << 2,
        IB_QP_CREATE_MANAGED_SEND               = 1 << 3,
        IB_QP_CREATE_MANAGED_RECV               = 1 << 4,
        IB_QP_CREATE_NETIF_QP                   = 1 << 5,
        IB_QP_CREATE_INTEGRITY_EN               = 1 << 6,
        IB_QP_CREATE_NETDEV_USE                 = 1 << 7,
        IB_QP_CREATE_SCATTER_FCS                =
                IB_UVERBS_QP_CREATE_SCATTER_FCS,
        IB_QP_CREATE_CVLAN_STRIPPING            =
                IB_UVERBS_QP_CREATE_CVLAN_STRIPPING,
        IB_QP_CREATE_SOURCE_QPN                 = 1 << 10,
        IB_QP_CREATE_PCI_WRITE_END_PADDING      =
                IB_UVERBS_QP_CREATE_PCI_WRITE_END_PADDING,
        /* reserve bits 26-31 for low level drivers' internal use */
        IB_QP_CREATE_RESERVED_START             = 1 << 26,
        IB_QP_CREATE_RESERVED_END               = 1 << 31,
};

/*
 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
 * callback to destroy the passed in QP.
 */

struct ib_qp_init_attr {
        /* Consumer's event_handler callback must not block */
        void                  (*event_handler)(struct ib_event *, void *);

        void                   *qp_context;
        struct ib_cq           *send_cq;
        struct ib_cq           *recv_cq;
        struct ib_srq          *srq;
        struct ib_xrcd         *xrcd;     /* XRC TGT QPs only */
        struct ib_qp_cap        cap;
        enum ib_sig_type        sq_sig_type;
        enum ib_qp_type         qp_type;
        u32                     create_flags;

        /*
         * Only needed for special QP types, or when using the RW API.
         */
        u32                     port_num;
        struct ib_rwq_ind_table *rwq_ind_tbl;
        u32                     source_qpn;
};

struct ib_qp_open_attr {
        void                  (*event_handler)(struct ib_event *, void *);
        void                   *qp_context;
        u32                     qp_num;
        enum ib_qp_type         qp_type;
};

enum ib_rnr_timeout {
        IB_RNR_TIMER_655_36 =  0,
        IB_RNR_TIMER_000_01 =  1,
        IB_RNR_TIMER_000_02 =  2,
        IB_RNR_TIMER_000_03 =  3,
        IB_RNR_TIMER_000_04 =  4,
        IB_RNR_TIMER_000_06 =  5,
        IB_RNR_TIMER_000_08 =  6,
        IB_RNR_TIMER_000_12 =  7,
        IB_RNR_TIMER_000_16 =  8,
        IB_RNR_TIMER_000_24 =  9,
        IB_RNR_TIMER_000_32 = 10,
        IB_RNR_TIMER_000_48 = 11,
        IB_RNR_TIMER_000_64 = 12,
        IB_RNR_TIMER_000_96 = 13,
        IB_RNR_TIMER_001_28 = 14,
        IB_RNR_TIMER_001_92 = 15,
        IB_RNR_TIMER_002_56 = 16,
        IB_RNR_TIMER_003_84 = 17,
        IB_RNR_TIMER_005_12 = 18,
        IB_RNR_TIMER_007_68 = 19,
        IB_RNR_TIMER_010_24 = 20,
        IB_RNR_TIMER_015_36 = 21,
        IB_RNR_TIMER_020_48 = 22,
        IB_RNR_TIMER_030_72 = 23,
        IB_RNR_TIMER_040_96 = 24,
        IB_RNR_TIMER_061_44 = 25,
        IB_RNR_TIMER_081_92 = 26,
        IB_RNR_TIMER_122_88 = 27,
        IB_RNR_TIMER_163_84 = 28,
        IB_RNR_TIMER_245_76 = 29,
        IB_RNR_TIMER_327_68 = 30,
        IB_RNR_TIMER_491_52 = 31
};

enum ib_qp_attr_mask {
        IB_QP_STATE                     = 1,
        IB_QP_CUR_STATE                 = (1<<1),
        IB_QP_EN_SQD_ASYNC_NOTIFY       = (1<<2),
        IB_QP_ACCESS_FLAGS              = (1<<3),
        IB_QP_PKEY_INDEX                = (1<<4),
        IB_QP_PORT                      = (1<<5),
        IB_QP_QKEY                      = (1<<6),
        IB_QP_AV                        = (1<<7),
        IB_QP_PATH_MTU                  = (1<<8),
        IB_QP_TIMEOUT                   = (1<<9),
        IB_QP_RETRY_CNT                 = (1<<10),
        IB_QP_RNR_RETRY                 = (1<<11),
        IB_QP_RQ_PSN                    = (1<<12),
        IB_QP_MAX_QP_RD_ATOMIC          = (1<<13),
        IB_QP_ALT_PATH                  = (1<<14),
        IB_QP_MIN_RNR_TIMER             = (1<<15),
        IB_QP_SQ_PSN                    = (1<<16),
        IB_QP_MAX_DEST_RD_ATOMIC        = (1<<17),
        IB_QP_PATH_MIG_STATE            = (1<<18),
        IB_QP_CAP                       = (1<<19),
        IB_QP_DEST_QPN                  = (1<<20),
        IB_QP_RESERVED1                 = (1<<21),
        IB_QP_RESERVED2                 = (1<<22),
        IB_QP_RESERVED3                 = (1<<23),
        IB_QP_RESERVED4                 = (1<<24),
        IB_QP_RATE_LIMIT                = (1<<25),

        IB_QP_ATTR_STANDARD_BITS = GENMASK(20, 0),
};

enum ib_qp_state {
        IB_QPS_RESET,
        IB_QPS_INIT,
        IB_QPS_RTR,
        IB_QPS_RTS,
        IB_QPS_SQD,
        IB_QPS_SQE,
        IB_QPS_ERR
};

enum ib_mig_state {
        IB_MIG_MIGRATED,
        IB_MIG_REARM,
        IB_MIG_ARMED
};

enum ib_mw_type {
        IB_MW_TYPE_1 = 1,
        IB_MW_TYPE_2 = 2
};

struct ib_qp_attr {
        enum ib_qp_state        qp_state;
        enum ib_qp_state        cur_qp_state;
        enum ib_mtu             path_mtu;
        enum ib_mig_state       path_mig_state;
        u32                     qkey;
        u32                     rq_psn;
        u32                     sq_psn;
        u32                     dest_qp_num;
        int                     qp_access_flags;
        struct ib_qp_cap        cap;
        struct rdma_ah_attr     ah_attr;
        struct rdma_ah_attr     alt_ah_attr;
        u16                     pkey_index;
        u16                     alt_pkey_index;
        u8                      en_sqd_async_notify;
        u8                      sq_draining;
        u8                      max_rd_atomic;
        u8                      max_dest_rd_atomic;
        u8                      min_rnr_timer;
        u32                     port_num;
        u8                      timeout;
        u8                      retry_cnt;
        u8                      rnr_retry;
        u32                     alt_port_num;
        u8                      alt_timeout;
        u32                     rate_limit;
        struct net_device       *xmit_slave;
};

enum ib_wr_opcode {
        /* These are shared with userspace */
        IB_WR_RDMA_WRITE = IB_UVERBS_WR_RDMA_WRITE,
        IB_WR_RDMA_WRITE_WITH_IMM = IB_UVERBS_WR_RDMA_WRITE_WITH_IMM,
        IB_WR_SEND = IB_UVERBS_WR_SEND,
        IB_WR_SEND_WITH_IMM = IB_UVERBS_WR_SEND_WITH_IMM,
        IB_WR_RDMA_READ = IB_UVERBS_WR_RDMA_READ,
        IB_WR_ATOMIC_CMP_AND_SWP = IB_UVERBS_WR_ATOMIC_CMP_AND_SWP,
        IB_WR_ATOMIC_FETCH_AND_ADD = IB_UVERBS_WR_ATOMIC_FETCH_AND_ADD,
        IB_WR_BIND_MW = IB_UVERBS_WR_BIND_MW,
        IB_WR_LSO = IB_UVERBS_WR_TSO,
        IB_WR_SEND_WITH_INV = IB_UVERBS_WR_SEND_WITH_INV,
        IB_WR_RDMA_READ_WITH_INV = IB_UVERBS_WR_RDMA_READ_WITH_INV,
        IB_WR_LOCAL_INV = IB_UVERBS_WR_LOCAL_INV,
        IB_WR_MASKED_ATOMIC_CMP_AND_SWP =
                IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP,
        IB_WR_MASKED_ATOMIC_FETCH_AND_ADD =
                IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD,

        /* These are kernel only and can not be issued by userspace */
        IB_WR_REG_MR = 0x20,
        IB_WR_REG_MR_INTEGRITY,

        /* reserve values for low level drivers' internal use.
         * These values will not be used at all in the ib core layer.
         */
        IB_WR_RESERVED1 = 0xf0,
        IB_WR_RESERVED2,
        IB_WR_RESERVED3,
        IB_WR_RESERVED4,
        IB_WR_RESERVED5,
        IB_WR_RESERVED6,
        IB_WR_RESERVED7,
        IB_WR_RESERVED8,
        IB_WR_RESERVED9,
        IB_WR_RESERVED10,
};

enum ib_send_flags {
        IB_SEND_FENCE           = 1,
        IB_SEND_SIGNALED        = (1<<1),
        IB_SEND_SOLICITED       = (1<<2),
        IB_SEND_INLINE          = (1<<3),
        IB_SEND_IP_CSUM         = (1<<4),

        /* reserve bits 26-31 for low level drivers' internal use */
        IB_SEND_RESERVED_START  = (1 << 26),
        IB_SEND_RESERVED_END    = (1 << 31),
};

struct ib_sge {
        u64     addr;
        u32     length;
        u32     lkey;
};

struct ib_cqe {
        void (*done)(struct ib_cq *cq, struct ib_wc *wc);
};

struct ib_send_wr {
        struct ib_send_wr      *next;
        union {
                u64             wr_id;
                struct ib_cqe   *wr_cqe;
        };
        struct ib_sge          *sg_list;
        int                     num_sge;
        enum ib_wr_opcode       opcode;
        int                     send_flags;
        union {
                __be32          imm_data;
                u32             invalidate_rkey;
        } ex;
};

struct ib_rdma_wr {
        struct ib_send_wr       wr;
        u64                     remote_addr;
        u32                     rkey;
};

static inline const struct ib_rdma_wr *rdma_wr(const struct ib_send_wr *wr)
{
        return container_of(wr, struct ib_rdma_wr, wr);
}

struct ib_atomic_wr {
        struct ib_send_wr       wr;
        u64                     remote_addr;
        u64                     compare_add;
        u64                     swap;
        u64                     compare_add_mask;
        u64                     swap_mask;
        u32                     rkey;
};

static inline const struct ib_atomic_wr *atomic_wr(const struct ib_send_wr *wr)
{
        return container_of(wr, struct ib_atomic_wr, wr);
}

struct ib_ud_wr {
        struct ib_send_wr       wr;
        struct ib_ah            *ah;
        void                    *header;
        int                     hlen;
        int                     mss;
        u32                     remote_qpn;
        u32                     remote_qkey;
        u16                     pkey_index; /* valid for GSI only */
        u32                     port_num; /* valid for DR SMPs on switch only */
};

static inline const struct ib_ud_wr *ud_wr(const struct ib_send_wr *wr)
{
        return container_of(wr, struct ib_ud_wr, wr);
}

struct ib_reg_wr {
        struct ib_send_wr       wr;
        struct ib_mr            *mr;
        u32                     key;
        int                     access;
};

static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr)
{
        return container_of(wr, struct ib_reg_wr, wr);
}

struct ib_recv_wr {
        struct ib_recv_wr      *next;
        union {
                u64             wr_id;
                struct ib_cqe   *wr_cqe;
        };
        struct ib_sge          *sg_list;
        int                     num_sge;
};

enum ib_access_flags {
        IB_ACCESS_LOCAL_WRITE = IB_UVERBS_ACCESS_LOCAL_WRITE,
        IB_ACCESS_REMOTE_WRITE = IB_UVERBS_ACCESS_REMOTE_WRITE,
        IB_ACCESS_REMOTE_READ = IB_UVERBS_ACCESS_REMOTE_READ,
        IB_ACCESS_REMOTE_ATOMIC = IB_UVERBS_ACCESS_REMOTE_ATOMIC,
        IB_ACCESS_MW_BIND = IB_UVERBS_ACCESS_MW_BIND,
        IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED,
        IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND,
        IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB,
        IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING,

        IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE,
        IB_ACCESS_SUPPORTED =
                ((IB_ACCESS_HUGETLB << 1) - 1) | IB_ACCESS_OPTIONAL,
};

/*
 * XXX: these are apparently used for ->rereg_user_mr, no idea why they
 * are hidden here instead of a uapi header!
 */
enum ib_mr_rereg_flags {
        IB_MR_REREG_TRANS       = 1,
        IB_MR_REREG_PD          = (1<<1),
        IB_MR_REREG_ACCESS      = (1<<2),
        IB_MR_REREG_SUPPORTED   = ((IB_MR_REREG_ACCESS << 1) - 1)
};

struct ib_umem;

enum rdma_remove_reason {
        /*
         * Userspace requested uobject deletion or initial try
         * to remove uobject via cleanup. Call could fail
         */
        RDMA_REMOVE_DESTROY,
        /* Context deletion. This call should delete the actual object itself */
        RDMA_REMOVE_CLOSE,
        /* Driver is being hot-unplugged. This call should delete the actual object itself */
        RDMA_REMOVE_DRIVER_REMOVE,
        /* uobj is being cleaned-up before being committed */
        RDMA_REMOVE_ABORT,
        /* The driver failed to destroy the uobject and is being disconnected */
        RDMA_REMOVE_DRIVER_FAILURE,
};

struct ib_rdmacg_object {
#ifdef CONFIG_CGROUP_RDMA
        struct rdma_cgroup      *cg;            /* owner rdma cgroup */
#endif
};

struct ib_ucontext {
        struct ib_device       *device;
        struct ib_uverbs_file  *ufile;

        struct ib_rdmacg_object cg_obj;
        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct rdma_restrack_entry res;
        struct xarray mmap_xa;
};

struct ib_uobject {
        u64                     user_handle;    /* handle given to us by userspace */
        /* ufile & ucontext owning this object */
        struct ib_uverbs_file  *ufile;
        /* FIXME, save memory: ufile->context == context */
        struct ib_ucontext     *context;        /* associated user context */
        void                   *object;         /* containing object */
        struct list_head        list;           /* link to context's list */
        struct ib_rdmacg_object cg_obj;         /* rdmacg object */
        int                     id;             /* index into kernel idr */
        struct kref             ref;
        atomic_t                usecnt;         /* protects exclusive access */
        struct rcu_head         rcu;            /* kfree_rcu() overhead */

        const struct uverbs_api_object *uapi_object;
};

struct ib_udata {
        const void __user *inbuf;
        void __user *outbuf;
        size_t       inlen;
        size_t       outlen;
};

struct ib_pd {
        u32                     local_dma_lkey;
        u32                     flags;
        struct ib_device       *device;
        struct ib_uobject      *uobject;
        atomic_t                usecnt; /* count all resources */

        u32                     unsafe_global_rkey;

        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct ib_mr           *__internal_mr;
        struct rdma_restrack_entry res;
};

struct ib_xrcd {
        struct ib_device       *device;
        atomic_t                usecnt; /* count all exposed resources */
        struct inode           *inode;
        struct rw_semaphore     tgt_qps_rwsem;
        struct xarray           tgt_qps;
};

struct ib_ah {
        struct ib_device        *device;
        struct ib_pd            *pd;
        struct ib_uobject       *uobject;
        const struct ib_gid_attr *sgid_attr;
        enum rdma_ah_attr_type  type;
};

typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);

enum ib_poll_context {
        IB_POLL_SOFTIRQ,           /* poll from softirq context */
        IB_POLL_WORKQUEUE,         /* poll from workqueue */
        IB_POLL_UNBOUND_WORKQUEUE, /* poll from unbound workqueue */
        IB_POLL_LAST_POOL_TYPE = IB_POLL_UNBOUND_WORKQUEUE,

        IB_POLL_DIRECT,            /* caller context, no hw completions */
};

struct ib_cq {
        struct ib_device       *device;
        struct ib_ucq_object   *uobject;
        ib_comp_handler         comp_handler;
        void                  (*event_handler)(struct ib_event *, void *);
        void                   *cq_context;
        int                     cqe;
        unsigned int            cqe_used;
        atomic_t                usecnt; /* count number of work queues */
        enum ib_poll_context    poll_ctx;
        struct ib_wc            *wc;
        struct list_head        pool_entry;
        union {
                struct irq_poll         iop;
                struct work_struct      work;
        };
        struct workqueue_struct *comp_wq;
        struct dim *dim;

        /* updated only by trace points */
        ktime_t timestamp;
        u8 interrupt:1;
        u8 shared:1;
        unsigned int comp_vector;

        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct rdma_restrack_entry res;
};

struct ib_srq {
        struct ib_device       *device;
        struct ib_pd           *pd;
        struct ib_usrq_object  *uobject;
        void                  (*event_handler)(struct ib_event *, void *);
        void                   *srq_context;
        enum ib_srq_type        srq_type;
        atomic_t                usecnt;

        struct {
                struct ib_cq   *cq;
                union {
                        struct {
                                struct ib_xrcd *xrcd;
                                u32             srq_num;
                        } xrc;
                };
        } ext;

        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct rdma_restrack_entry res;
};

enum ib_raw_packet_caps {
        /* Strip cvlan from incoming packet and report it in the matching work
         * completion is supported.
         */
        IB_RAW_PACKET_CAP_CVLAN_STRIPPING       = (1 << 0),
        /* Scatter FCS field of an incoming packet to host memory is supported.
         */
        IB_RAW_PACKET_CAP_SCATTER_FCS           = (1 << 1),
        /* Checksum offloads are supported (for both send and receive). */
        IB_RAW_PACKET_CAP_IP_CSUM               = (1 << 2),
        /* When a packet is received for an RQ with no receive WQEs, the
         * packet processing is delayed.
         */
        IB_RAW_PACKET_CAP_DELAY_DROP            = (1 << 3),
};

enum ib_wq_type {
        IB_WQT_RQ = IB_UVERBS_WQT_RQ,
};

enum ib_wq_state {
        IB_WQS_RESET,
        IB_WQS_RDY,
        IB_WQS_ERR
};

struct ib_wq {
        struct ib_device       *device;
        struct ib_uwq_object   *uobject;
        void                *wq_context;
        void                (*event_handler)(struct ib_event *, void *);
        struct ib_pd           *pd;
        struct ib_cq           *cq;
        u32             wq_num;
        enum ib_wq_state       state;
        enum ib_wq_type wq_type;
        atomic_t                usecnt;
};

enum ib_wq_flags {
        IB_WQ_FLAGS_CVLAN_STRIPPING     = IB_UVERBS_WQ_FLAGS_CVLAN_STRIPPING,
        IB_WQ_FLAGS_SCATTER_FCS         = IB_UVERBS_WQ_FLAGS_SCATTER_FCS,
        IB_WQ_FLAGS_DELAY_DROP          = IB_UVERBS_WQ_FLAGS_DELAY_DROP,
        IB_WQ_FLAGS_PCI_WRITE_END_PADDING =
                                IB_UVERBS_WQ_FLAGS_PCI_WRITE_END_PADDING,
};

struct ib_wq_init_attr {
        void                   *wq_context;
        enum ib_wq_type wq_type;
        u32             max_wr;
        u32             max_sge;
        struct  ib_cq          *cq;
        void                (*event_handler)(struct ib_event *, void *);
        u32             create_flags; /* Use enum ib_wq_flags */
};

enum ib_wq_attr_mask {
        IB_WQ_STATE             = 1 << 0,
        IB_WQ_CUR_STATE         = 1 << 1,
        IB_WQ_FLAGS             = 1 << 2,
};

struct ib_wq_attr {
        enum    ib_wq_state     wq_state;
        enum    ib_wq_state     curr_wq_state;
        u32                     flags; /* Use enum ib_wq_flags */
        u32                     flags_mask; /* Use enum ib_wq_flags */
};

struct ib_rwq_ind_table {
        struct ib_device        *device;
        struct ib_uobject      *uobject;
        atomic_t                usecnt;
        u32             ind_tbl_num;
        u32             log_ind_tbl_size;
        struct ib_wq    **ind_tbl;
};

struct ib_rwq_ind_table_init_attr {
        u32             log_ind_tbl_size;
        /* Each entry is a pointer to Receive Work Queue */
        struct ib_wq    **ind_tbl;
};

enum port_pkey_state {
        IB_PORT_PKEY_NOT_VALID = 0,
        IB_PORT_PKEY_VALID = 1,
        IB_PORT_PKEY_LISTED = 2,
};

struct ib_qp_security;

struct ib_port_pkey {
        enum port_pkey_state    state;
        u16                     pkey_index;
        u32                     port_num;
        struct list_head        qp_list;
        struct list_head        to_error_list;
        struct ib_qp_security  *sec;
};

struct ib_ports_pkeys {
        struct ib_port_pkey     main;
        struct ib_port_pkey     alt;
};

struct ib_qp_security {
        struct ib_qp           *qp;
        struct ib_device       *dev;
        /* Hold this mutex when changing port and pkey settings. */
        struct mutex            mutex;
        struct ib_ports_pkeys  *ports_pkeys;
        /* A list of all open shared QP handles.  Required to enforce security
         * properly for all users of a shared QP.
         */
        struct list_head        shared_qp_list;
        void                   *security;
        bool                    destroying;
        atomic_t                error_list_count;
        struct completion       error_complete;
        int                     error_comps_pending;
};

/*
 * @max_write_sge: Maximum SGE elements per RDMA WRITE request.
 * @max_read_sge:  Maximum SGE elements per RDMA READ request.
 */
struct ib_qp {
        struct ib_device       *device;
        struct ib_pd           *pd;
        struct ib_cq           *send_cq;
        struct ib_cq           *recv_cq;
        spinlock_t              mr_lock;
        int                     mrs_used;
        struct list_head        rdma_mrs;
        struct list_head        sig_mrs;
        struct ib_srq          *srq;
        struct ib_xrcd         *xrcd; /* XRC TGT QPs only */
        struct list_head        xrcd_list;

        /* count times opened, mcast attaches, flow attaches */
        atomic_t                usecnt;
        struct list_head        open_list;
        struct ib_qp           *real_qp;
        struct ib_uqp_object   *uobject;
        void                  (*event_handler)(struct ib_event *, void *);
        void                   *qp_context;
        /* sgid_attrs associated with the AV's */
        const struct ib_gid_attr *av_sgid_attr;
        const struct ib_gid_attr *alt_path_sgid_attr;
        u32                     qp_num;
        u32                     max_write_sge;
        u32                     max_read_sge;
        enum ib_qp_type         qp_type;
        struct ib_rwq_ind_table *rwq_ind_tbl;
        struct ib_qp_security  *qp_sec;
        u32                     port;

        bool                    integrity_en;
        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct rdma_restrack_entry     res;

        /* The counter the qp is bind to */
        struct rdma_counter    *counter;
};

struct ib_dm {
        struct ib_device  *device;
        u32                length;
        u32                flags;
        struct ib_uobject *uobject;
        atomic_t           usecnt;
};

struct ib_mr {
        struct ib_device  *device;
        struct ib_pd      *pd;
        u32                lkey;
        u32                rkey;
        u64                iova;
        u64                length;
        unsigned int       page_size;
        enum ib_mr_type    type;
        bool               need_inval;
        union {
                struct ib_uobject       *uobject;       /* user */
                struct list_head        qp_entry;       /* FR */
        };

        struct ib_dm      *dm;
        struct ib_sig_attrs *sig_attrs; /* only for IB_MR_TYPE_INTEGRITY MRs */
        /*
         * Implementation details of the RDMA core, don't use in drivers:
         */
        struct rdma_restrack_entry res;
};

struct ib_mw {
        struct ib_device        *device;
        struct ib_pd            *pd;
        struct ib_uobject       *uobject;
        u32                     rkey;
        enum ib_mw_type         type;
};

/* Supported steering options */
enum ib_flow_attr_type {
        /* steering according to rule specifications */
        IB_FLOW_ATTR_NORMAL             = 0x0,
        /* default unicast and multicast rule -
         * receive all Eth traffic which isn't steered to any QP
         */
        IB_FLOW_ATTR_ALL_DEFAULT        = 0x1,
        /* default multicast rule -
         * receive all Eth multicast traffic which isn't steered to any QP
         */
        IB_FLOW_ATTR_MC_DEFAULT         = 0x2,
        /* sniffer rule - receive all port traffic */
        IB_FLOW_ATTR_SNIFFER            = 0x3
};

/* Supported steering header types */
enum ib_flow_spec_type {
        /* L2 headers*/
        IB_FLOW_SPEC_ETH                = 0x20,
        IB_FLOW_SPEC_IB                 = 0x22,
        /* L3 header*/
        IB_FLOW_SPEC_IPV4               = 0x30,
        IB_FLOW_SPEC_IPV6               = 0x31,
        IB_FLOW_SPEC_ESP                = 0x34,
        /* L4 headers*/
        IB_FLOW_SPEC_TCP                = 0x40,
        IB_FLOW_SPEC_UDP                = 0x41,
        IB_FLOW_SPEC_VXLAN_TUNNEL       = 0x50,
        IB_FLOW_SPEC_GRE                = 0x51,
        IB_FLOW_SPEC_MPLS               = 0x60,
        IB_FLOW_SPEC_INNER              = 0x100,
        /* Actions */
        IB_FLOW_SPEC_ACTION_TAG         = 0x1000,
        IB_FLOW_SPEC_ACTION_DROP        = 0x1001,
        IB_FLOW_SPEC_ACTION_HANDLE      = 0x1002,
        IB_FLOW_SPEC_ACTION_COUNT       = 0x1003,
};
#define IB_FLOW_SPEC_LAYER_MASK 0xF0
#define IB_FLOW_SPEC_SUPPORT_LAYERS 10

enum ib_flow_flags {
        IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */
        IB_FLOW_ATTR_FLAGS_EGRESS = 1UL << 2, /* Egress flow */
        IB_FLOW_ATTR_FLAGS_RESERVED  = 1UL << 3  /* Must be last */
};

struct ib_flow_eth_filter {
        u8      dst_mac[6];
        u8      src_mac[6];
        __be16  ether_type;
        __be16  vlan_tag;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_eth {
        u32                       type;
        u16                       size;
        struct ib_flow_eth_filter val;
        struct ib_flow_eth_filter mask;
};

struct ib_flow_ib_filter {
        __be16 dlid;
        __u8   sl;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_ib {
        u32                      type;
        u16                      size;
        struct ib_flow_ib_filter val;
        struct ib_flow_ib_filter mask;
};

/* IPv4 header flags */
enum ib_ipv4_flags {
        IB_IPV4_DONT_FRAG = 0x2, /* Don't enable packet fragmentation */
        IB_IPV4_MORE_FRAG = 0X4  /* For All fragmented packets except the
                                    last have this flag set */
};

struct ib_flow_ipv4_filter {
        __be32  src_ip;
        __be32  dst_ip;
        u8      proto;
        u8      tos;
        u8      ttl;
        u8      flags;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_ipv4 {
        u32                        type;
        u16                        size;
        struct ib_flow_ipv4_filter val;
        struct ib_flow_ipv4_filter mask;
};

struct ib_flow_ipv6_filter {
        u8      src_ip[16];
        u8      dst_ip[16];
        __be32  flow_label;
        u8      next_hdr;
        u8      traffic_class;
        u8      hop_limit;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_ipv6 {
        u32                        type;
        u16                        size;
        struct ib_flow_ipv6_filter val;
        struct ib_flow_ipv6_filter mask;
};

struct ib_flow_tcp_udp_filter {
        __be16  dst_port;
        __be16  src_port;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_tcp_udp {
        u32                           type;
        u16                           size;
        struct ib_flow_tcp_udp_filter val;
        struct ib_flow_tcp_udp_filter mask;
};

struct ib_flow_tunnel_filter {
        __be32  tunnel_id;
        u8      real_sz[];
};

/* ib_flow_spec_tunnel describes the Vxlan tunnel
 * the tunnel_id from val has the vni value
 */
struct ib_flow_spec_tunnel {
        u32                           type;
        u16                           size;
        struct ib_flow_tunnel_filter  val;
        struct ib_flow_tunnel_filter  mask;
};

struct ib_flow_esp_filter {
        __be32  spi;
        __be32  seq;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_esp {
        u32                           type;
        u16                           size;
        struct ib_flow_esp_filter     val;
        struct ib_flow_esp_filter     mask;
};

struct ib_flow_gre_filter {
        __be16 c_ks_res0_ver;
        __be16 protocol;
        __be32 key;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_gre {
        u32                           type;
        u16                           size;
        struct ib_flow_gre_filter     val;
        struct ib_flow_gre_filter     mask;
};

struct ib_flow_mpls_filter {
        __be32 tag;
        /* Must be last */
        u8      real_sz[];
};

struct ib_flow_spec_mpls {
        u32                           type;
        u16                           size;
        struct ib_flow_mpls_filter     val;
        struct ib_flow_mpls_filter     mask;
};

struct ib_flow_spec_action_tag {
        enum ib_flow_spec_type        type;
        u16                           size;
        u32                           tag_id;
};

struct ib_flow_spec_action_drop {
        enum ib_flow_spec_type        type;
        u16                           size;
};

struct ib_flow_spec_action_handle {
        enum ib_flow_spec_type        type;
        u16                           size;
        struct ib_flow_action        *act;
};

enum ib_counters_description {
        IB_COUNTER_PACKETS,
        IB_COUNTER_BYTES,
};

struct ib_flow_spec_action_count {
        enum ib_flow_spec_type type;
        u16 size;
        struct ib_counters *counters;
};

union ib_flow_spec {
        struct {
                u32                     type;
                u16                     size;
        };
        struct ib_flow_spec_eth         eth;
        struct ib_flow_spec_ib          ib;
        struct ib_flow_spec_ipv4        ipv4;
        struct ib_flow_spec_tcp_udp     tcp_udp;
        struct ib_flow_spec_ipv6        ipv6;
        struct ib_flow_spec_tunnel      tunnel;
        struct ib_flow_spec_esp         esp;
        struct ib_flow_spec_gre         gre;
        struct ib_flow_spec_mpls        mpls;
        struct ib_flow_spec_action_tag  flow_tag;
        struct ib_flow_spec_action_drop drop;
        struct ib_flow_spec_action_handle action;
        struct ib_flow_spec_action_count flow_count;
};

struct ib_flow_attr {
        enum ib_flow_attr_type type;
        u16          size;
        u16          priority;
        u32          flags;
        u8           num_of_specs;
        u32          port;
        union ib_flow_spec flows[];
};

struct ib_flow {
        struct ib_qp            *qp;
        struct ib_device        *device;
        struct ib_uobject       *uobject;
};

enum ib_flow_action_type {
        IB_FLOW_ACTION_UNSPECIFIED,
        IB_FLOW_ACTION_ESP = 1,
};

struct ib_flow_action_attrs_esp_keymats {
        enum ib_uverbs_flow_action_esp_keymat                   protocol;
        union {
                struct ib_uverbs_flow_action_esp_keymat_aes_gcm aes_gcm;
        } keymat;
};

struct ib_flow_action_attrs_esp_replays {
        enum ib_uverbs_flow_action_esp_replay                   protocol;
        union {
                struct ib_uverbs_flow_action_esp_replay_bmp     bmp;
        } replay;
};

enum ib_flow_action_attrs_esp_flags {
        /* All user-space flags at the top: Use enum ib_uverbs_flow_action_esp_flags
         * This is done in order to share the same flags between user-space and
         * kernel and spare an unnecessary translation.
         */

        /* Kernel flags */
        IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED  = 1ULL << 32,
        IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS  = 1ULL << 33,
};

struct ib_flow_spec_list {
        struct ib_flow_spec_list        *next;
        union ib_flow_spec              spec;
};

struct ib_flow_action_attrs_esp {
        struct ib_flow_action_attrs_esp_keymats         *keymat;
        struct ib_flow_action_attrs_esp_replays         *replay;
        struct ib_flow_spec_list                        *encap;
        /* Used only if IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED is enabled.
         * Value of 0 is a valid value.
         */
        u32                                             esn;
        u32                                             spi;
        u32                                             seq;
        u32                                             tfc_pad;
        /* Use enum ib_flow_action_attrs_esp_flags */
        u64                                             flags;
        u64                                             hard_limit_pkts;
};

struct ib_flow_action {
        struct ib_device                *device;
        struct ib_uobject               *uobject;
        enum ib_flow_action_type        type;
        atomic_t                        usecnt;
};

struct ib_mad;

enum ib_process_mad_flags {
        IB_MAD_IGNORE_MKEY      = 1,
        IB_MAD_IGNORE_BKEY      = 2,
        IB_MAD_IGNORE_ALL       = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
};

enum ib_mad_result {
        IB_MAD_RESULT_FAILURE  = 0,      /* (!SUCCESS is the important flag) */
        IB_MAD_RESULT_SUCCESS  = 1 << 0, /* MAD was successfully processed   */
        IB_MAD_RESULT_REPLY    = 1 << 1, /* Reply packet needs to be sent    */
        IB_MAD_RESULT_CONSUMED = 1 << 2  /* Packet consumed: stop processing */
};

struct ib_port_cache {
        u64                   subnet_prefix;
        struct ib_pkey_cache  *pkey;
        struct ib_gid_table   *gid;
        u8                     lmc;
        enum ib_port_state     port_state;
};

struct ib_port_immutable {
        int                           pkey_tbl_len;
        int                           gid_tbl_len;
        u32                           core_cap_flags;
        u32                           max_mad_size;
};

struct ib_port_data {
        struct ib_device *ib_dev;

        struct ib_port_immutable immutable;

        spinlock_t pkey_list_lock;

        spinlock_t netdev_lock;

        struct list_head pkey_list;

        struct ib_port_cache cache;

        struct net_device __rcu *netdev;
        struct hlist_node ndev_hash_link;
        struct rdma_port_counter port_counter;
        struct ib_port *sysfs;
};

/* rdma netdev type - specifies protocol type */
enum rdma_netdev_t {
        RDMA_NETDEV_OPA_VNIC,
        RDMA_NETDEV_IPOIB,
};

/**
 * struct rdma_netdev - rdma netdev
 * For cases where netstack interfacing is required.
 */
struct rdma_netdev {
        void              *clnt_priv;
        struct ib_device  *hca;
        u32                port_num;
        int                mtu;

        /*
         * cleanup function must be specified.
         * FIXME: This is only used for OPA_VNIC and that usage should be
         * removed too.
         */
        void (*free_rdma_netdev)(struct net_device *netdev);

        /* control functions */
        void (*set_id)(struct net_device *netdev, int id);
        /* send packet */
        int (*send)(struct net_device *dev, struct sk_buff *skb,
                    struct ib_ah *address, u32 dqpn);
        /* multicast */
        int (*attach_mcast)(struct net_device *dev, struct ib_device *hca,
                            union ib_gid *gid, u16 mlid,
                            int set_qkey, u32 qkey);
        int (*detach_mcast)(struct net_device *dev, struct ib_device *hca,
                            union ib_gid *gid, u16 mlid);
        /* timeout */
        void (*tx_timeout)(struct net_device *dev, unsigned int txqueue);
};

struct rdma_netdev_alloc_params {
        size_t sizeof_priv;
        unsigned int txqs;
        unsigned int rxqs;
        void *param;

        int (*initialize_rdma_netdev)(struct ib_device *device, u32 port_num,
                                      struct net_device *netdev, void *param);
};

struct ib_odp_counters {
        atomic64_t faults;
        atomic64_t invalidations;
        atomic64_t prefetch;
};

struct ib_counters {
        struct ib_device        *device;
        struct ib_uobject       *uobject;
        /* num of objects attached */
        atomic_t        usecnt;
};

struct ib_counters_read_attr {
        u64     *counters_buff;
        u32     ncounters;
        u32     flags; /* use enum ib_read_counters_flags */
};

struct uverbs_attr_bundle;
struct iw_cm_id;
struct iw_cm_conn_param;

#define INIT_RDMA_OBJ_SIZE(ib_struct, drv_struct, member)                      \
        .size_##ib_struct =                                                    \
                (sizeof(struct drv_struct) +                                   \
                 BUILD_BUG_ON_ZERO(offsetof(struct drv_struct, member)) +      \
                 BUILD_BUG_ON_ZERO(                                            \
                         !__same_type(((struct drv_struct *)NULL)->member,     \
                                      struct ib_struct)))

#define rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, gfp)                          \
        ((struct ib_type *)rdma_zalloc_obj(ib_dev, ib_dev->ops.size_##ib_type, \
                                           gfp, false))

#define rdma_zalloc_drv_obj_numa(ib_dev, ib_type)                              \
        ((struct ib_type *)rdma_zalloc_obj(ib_dev, ib_dev->ops.size_##ib_type, \
                                           GFP_KERNEL, true))

#define rdma_zalloc_drv_obj(ib_dev, ib_type)                                   \
        rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, GFP_KERNEL)

#define DECLARE_RDMA_OBJ_SIZE(ib_struct) size_t size_##ib_struct

struct rdma_user_mmap_entry {
        struct kref ref;
        struct ib_ucontext *ucontext;
        unsigned long start_pgoff;
        size_t npages;
        bool driver_removed;
};

/* Return the offset (in bytes) the user should pass to libc's mmap() */
static inline u64
rdma_user_mmap_get_offset(const struct rdma_user_mmap_entry *entry)
{
        return (u64)entry->start_pgoff << PAGE_SHIFT;
}

/**
 * struct ib_device_ops - InfiniBand device operations
 * This structure defines all the InfiniBand device operations, providers will
 * need to define the supported operations, otherwise they will be set to null.
 */
struct ib_device_ops {
        struct module *owner;
        enum rdma_driver_id driver_id;
        u32 uverbs_abi_ver;
        unsigned int uverbs_no_driver_id_binding:1;

        /*
         * NOTE: New drivers should not make use of device_group; instead new
         * device parameter should be exposed via netlink command. This
         * mechanism exists only for existing drivers.
         */
        const struct attribute_group *device_group;
        const struct attribute_group **port_groups;

        int (*post_send)(struct ib_qp *qp, const struct ib_send_wr *send_wr,
                         const struct ib_send_wr **bad_send_wr);
        int (*post_recv)(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
                         const struct ib_recv_wr **bad_recv_wr);
        void (*drain_rq)(struct ib_qp *qp);
        void (*drain_sq)(struct ib_qp *qp);
        int (*poll_cq)(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
        int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
        int (*req_notify_cq)(struct ib_cq *cq, enum ib_cq_notify_flags flags);
        int (*post_srq_recv)(struct ib_srq *srq,
                             const struct ib_recv_wr *recv_wr,
                             const struct ib_recv_wr **bad_recv_wr);
        int (*process_mad)(struct ib_device *device, int process_mad_flags,
                           u32 port_num, const struct ib_wc *in_wc,
                           const struct ib_grh *in_grh,
                           const struct ib_mad *in_mad, struct ib_mad *out_mad,
                           size_t *out_mad_size, u16 *out_mad_pkey_index);
        int (*query_device)(struct ib_device *device,
                            struct ib_device_attr *device_attr,
                            struct ib_udata *udata);
        int (*modify_device)(struct ib_device *device, int device_modify_mask,
                             struct ib_device_modify *device_modify);
        void (*get_dev_fw_str)(struct ib_device *device, char *str);
        const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev,
                                                     int comp_vector);
        int (*query_port)(struct ib_device *device, u32 port_num,
                          struct ib_port_attr *port_attr);
        int (*modify_port)(struct ib_device *device, u32 port_num,
                           int port_modify_mask,
                           struct ib_port_modify *port_modify);
        /**
         * The following mandatory functions are used only at device
         * registration.  Keep functions such as these at the end of this
         * structure to avoid cache line misses when accessing struct ib_device
         * in fast paths.
         */
        int (*get_port_immutable)(struct ib_device *device, u32 port_num,
                                  struct ib_port_immutable *immutable);
        enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
                                               u32 port_num);
        /**
         * When calling get_netdev, the HW vendor's driver should return the
         * net device of device @device at port @port_num or NULL if such
         * a net device doesn't exist. The vendor driver should call dev_hold
         * on this net device. The HW vendor's device driver must guarantee
         * that this function returns NULL before the net device has finished
         * NETDEV_UNREGISTER state.
         */
        struct net_device *(*get_netdev)(struct ib_device *device,
                                         u32 port_num);
        /**
         * rdma netdev operation
         *
         * Driver implementing alloc_rdma_netdev or rdma_netdev_get_params
         * must return -EOPNOTSUPP if it doesn't support the specified type.
         */
        struct net_device *(*alloc_rdma_netdev)(
                struct ib_device *device, u32 port_num, enum rdma_netdev_t type,
                const char *name, unsigned char name_assign_type,
                void (*setup)(struct net_device *));

        int (*rdma_netdev_get_params)(struct ib_device *device, u32 port_num,
                                      enum rdma_netdev_t type,
                                      struct rdma_netdev_alloc_params *params);
        /**
         * query_gid should be return GID value for @device, when @port_num
         * link layer is either IB or iWarp. It is no-op if @port_num port
         * is RoCE link layer.
         */
        int (*query_gid)(struct ib_device *device, u32 port_num, int index,
                         union ib_gid *gid);
        /**
         * When calling add_gid, the HW vendor's driver should add the gid
         * of device of port at gid index available at @attr. Meta-info of
         * that gid (for example, the network device related to this gid) is
         * available at @attr. @context allows the HW vendor driver to store
         * extra information together with a GID entry. The HW vendor driver may
         * allocate memory to contain this information and store it in @context
         * when a new GID entry is written to. Params are consistent until the
         * next call of add_gid or delete_gid. The function should return 0 on
         * success or error otherwise. The function could be called
         * concurrently for different ports. This function is only called when
         * roce_gid_table is used.
         */
        int (*add_gid)(const struct ib_gid_attr *attr, void **context);
        /**
         * When calling del_gid, the HW vendor's driver should delete the
         * gid of device @device at gid index gid_index of port port_num
         * available in @attr.
         * Upon the deletion of a GID entry, the HW vendor must free any
         * allocated memory. The caller will clear @context afterwards.
         * This function is only called when roce_gid_table is used.
         */
        int (*del_gid)(const struct ib_gid_attr *attr, void **context);
        int (*query_pkey)(struct ib_device *device, u32 port_num, u16 index,
                          u16 *pkey);
        int (*alloc_ucontext)(struct ib_ucontext *context,
                              struct ib_udata *udata);
        void (*dealloc_ucontext)(struct ib_ucontext *context);
        int (*mmap)(struct ib_ucontext *context, struct vm_area_struct *vma);
        /**
         * This will be called once refcount of an entry in mmap_xa reaches
         * zero. The type of the memory that was mapped may differ between
         * entries and is opaque to the rdma_user_mmap interface.
         * Therefore needs to be implemented by the driver in mmap_free.
         */
        void (*mmap_free)(struct rdma_user_mmap_entry *entry);
        void (*disassociate_ucontext)(struct ib_ucontext *ibcontext);
        int (*alloc_pd)(struct ib_pd *pd, struct ib_udata *udata);
        int (*dealloc_pd)(struct ib_pd *pd, struct ib_udata *udata);
        int (*create_ah)(struct ib_ah *ah, struct rdma_ah_init_attr *attr,
                         struct ib_udata *udata);
        int (*create_user_ah)(struct ib_ah *ah, struct rdma_ah_init_attr *attr,
                              struct ib_udata *udata);
        int (*modify_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
        int (*query_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
        int (*destroy_ah)(struct ib_ah *ah, u32 flags);
        int (*create_srq)(struct ib_srq *srq,
                          struct ib_srq_init_attr *srq_init_attr,
                          struct ib_udata *udata);
        int (*modify_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr,
                          enum ib_srq_attr_mask srq_attr_mask,
                          struct ib_udata *udata);
        int (*query_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
        int (*destroy_srq)(struct ib_srq *srq, struct ib_udata *udata);
        int (*create_qp)(struct ib_qp *qp, struct ib_qp_init_attr *qp_init_attr,
                         struct ib_udata *udata);
        int (*modify_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
                         int qp_attr_mask, struct ib_udata *udata);
        int (*query_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
                        int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
        int (*destroy_qp)(struct ib_qp *qp, struct ib_udata *udata);
        int (*create_cq)(struct ib_cq *cq, const struct ib_cq_init_attr *attr,
                         struct ib_udata *udata);
        int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period);
        int (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata);
        int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata);
        struct ib_mr *(*get_dma_mr)(struct ib_pd *pd, int mr_access_flags);
        struct ib_mr *(*reg_user_mr)(struct ib_pd *pd, u64 start, u64 length,
                                     u64 virt_addr, int mr_access_flags,
                                     struct ib_udata *udata);
        struct ib_mr *(*reg_user_mr_dmabuf)(struct ib_pd *pd, u64 offset,
                                            u64 length, u64 virt_addr, int fd,
                                            int mr_access_flags,
                                            struct ib_udata *udata);
        struct ib_mr *(*rereg_user_mr)(struct ib_mr *mr, int flags, u64 start,
                                       u64 length, u64 virt_addr,
                                       int mr_access_flags, struct ib_pd *pd,
                                       struct ib_udata *udata);
        int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata);
        struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type,
                                  u32 max_num_sg);
        struct ib_mr *(*alloc_mr_integrity)(struct ib_pd *pd,
                                            u32 max_num_data_sg,
                                            u32 max_num_meta_sg);
        int (*advise_mr)(struct ib_pd *pd,
                         enum ib_uverbs_advise_mr_advice advice, u32 flags,
                         struct ib_sge *sg_list, u32 num_sge,
                         struct uverbs_attr_bundle *attrs);

        /*
         * Kernel users should universally support relaxed ordering (RO), as
         * they are designed to read data only after observing the CQE and use
         * the DMA API correctly.
         *
         * Some drivers implicitly enable RO if platform supports it.
         */
        int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
                         unsigned int *sg_offset);
        int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
                               struct ib_mr_status *mr_status);
        int (*alloc_mw)(struct ib_mw *mw, struct ib_udata *udata);
        int (*dealloc_mw)(struct ib_mw *mw);
        int (*attach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid);
        int (*detach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid);
        int (*alloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata);
        int (*dealloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata);
        struct ib_flow *(*create_flow)(struct ib_qp *qp,
                                       struct ib_flow_attr *flow_attr,
                                       struct ib_udata *udata);
        int (*destroy_flow)(struct ib_flow *flow_id);
        struct ib_flow_action *(*create_flow_action_esp)(
                struct ib_device *device,
                const struct ib_flow_action_attrs_esp *attr,
                struct uverbs_attr_bundle *attrs);
        int (*destroy_flow_action)(struct ib_flow_action *action);
        int (*modify_flow_action_esp)(
                struct ib_flow_action *action,
                const struct ib_flow_action_attrs_esp *attr,
                struct uverbs_attr_bundle *attrs);
        int (*set_vf_link_state)(struct ib_device *device, int vf, u32 port,
                                 int state);
        int (*get_vf_config)(struct ib_device *device, int vf, u32 port,
                             struct ifla_vf_info *ivf);
        int (*get_vf_stats)(struct ib_device *device, int vf, u32 port,
                            struct ifla_vf_stats *stats);
        int (*get_vf_guid)(struct ib_device *device, int vf, u32 port,
                            struct ifla_vf_guid *node_guid,
                            struct ifla_vf_guid *port_guid);
        int (*set_vf_guid)(struct ib_device *device, int vf, u32 port, u64 guid,
                           int type);
        struct ib_wq *(*create_wq)(struct ib_pd *pd,
                                   struct ib_wq_init_attr *init_attr,
                                   struct ib_udata *udata);
        int (*destroy_wq)(struct ib_wq *wq, struct ib_udata *udata);
        int (*modify_wq)(struct ib_wq *wq, struct ib_wq_attr *attr,
                         u32 wq_attr_mask, struct ib_udata *udata);
        int (*create_rwq_ind_table)(struct ib_rwq_ind_table *ib_rwq_ind_table,
                                    struct ib_rwq_ind_table_init_attr *init_attr,
                                    struct ib_udata *udata);
        int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table);
        struct ib_dm *(*alloc_dm)(struct ib_device *device,
                                  struct ib_ucontext *context,
                                  struct ib_dm_alloc_attr *attr,
                                  struct uverbs_attr_bundle *attrs);
        int (*dealloc_dm)(struct ib_dm *dm, struct uverbs_attr_bundle *attrs);
        struct ib_mr *(*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm,
                                   struct ib_dm_mr_attr *attr,
                                   struct uverbs_attr_bundle *attrs);
        int (*create_counters)(struct ib_counters *counters,
                               struct uverbs_attr_bundle *attrs);
        int (*destroy_counters)(struct ib_counters *counters);
        int (*read_counters)(struct ib_counters *counters,
                             struct ib_counters_read_attr *counters_read_attr,
                             struct uverbs_attr_bundle *attrs);
        int (*map_mr_sg_pi)(struct ib_mr *mr, struct scatterlist *data_sg,
                            int data_sg_nents, unsigned int *data_sg_offset,
                            struct scatterlist *meta_sg, int meta_sg_nents,
                            unsigned int *meta_sg_offset);

        /**
         * alloc_hw_[device,port]_stats - Allocate a struct rdma_hw_stats and
         *   fill in the driver initialized data.  The struct is kfree()'ed by
         *   the sysfs core when the device is removed.  A lifespan of -1 in the
         *   return struct tells the core to set a default lifespan.
         */
        struct rdma_hw_stats *(*alloc_hw_device_stats)(struct ib_device *device);
        struct rdma_hw_stats *(*alloc_hw_port_stats)(struct ib_device *device,
                                                     u32 port_num);
        /**
         * get_hw_stats - Fill in the counter value(s) in the stats struct.
         * @index - The index in the value array we wish to have updated, or
         *   num_counters if we want all stats updated
         * Return codes -
         *   < 0 - Error, no counters updated
         *   index - Updated the single counter pointed to by index
         *   num_counters - Updated all counters (will reset the timestamp
         *     and prevent further calls for lifespan milliseconds)
         * Drivers are allowed to update all counters in leiu of just the
         *   one given in index at their option
         */
        int (*get_hw_stats)(struct ib_device *device,
                            struct rdma_hw_stats *stats, u32 port, int index);

        /**
         * Allows rdma drivers to add their own restrack attributes.
         */
        int (*fill_res_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
        int (*fill_res_mr_entry_raw)(struct sk_buff *msg, struct ib_mr *ibmr);
        int (*fill_res_cq_entry)(struct sk_buff *msg, struct ib_cq *ibcq);
        int (*fill_res_cq_entry_raw)(struct sk_buff *msg, struct ib_cq *ibcq);
        int (*fill_res_qp_entry)(struct sk_buff *msg, struct ib_qp *ibqp);
        int (*fill_res_qp_entry_raw)(struct sk_buff *msg, struct ib_qp *ibqp);
        int (*fill_res_cm_id_entry)(struct sk_buff *msg, struct rdma_cm_id *id);

        /* Device lifecycle callbacks */
        /*
         * Called after the device becomes registered, before clients are
         * attached
         */
        int (*enable_driver)(struct ib_device *dev);
        /*
         * This is called as part of ib_dealloc_device().
         */
        void (*dealloc_driver)(struct ib_device *dev);

        /* iWarp CM callbacks */
        void (*iw_add_ref)(struct ib_qp *qp);
        void (*iw_rem_ref)(struct ib_qp *qp);
        struct ib_qp *(*iw_get_qp)(struct ib_device *device, int qpn);
        int (*iw_connect)(struct iw_cm_id *cm_id,
                          struct iw_cm_conn_param *conn_param);
        int (*iw_accept)(struct iw_cm_id *cm_id,
                         struct iw_cm_conn_param *conn_param);
        int (*iw_reject)(struct iw_cm_id *cm_id, const void *pdata,
                         u8 pdata_len);
        int (*iw_create_listen)(struct iw_cm_id *cm_id, int backlog);
        int (*iw_destroy_listen)(struct iw_cm_id *cm_id);
        /**
         * counter_bind_qp - Bind a QP to a counter.
         * @counter - The counter to be bound. If counter->id is zero then
         *   the driver needs to allocate a new counter and set counter->id
         */
        int (*counter_bind_qp)(struct rdma_counter *counter, struct ib_qp *qp);
        /**
         * counter_unbind_qp - Unbind the qp from the dynamically-allocated
         *   counter and bind it onto the default one
         */
        int (*counter_unbind_qp)(struct ib_qp *qp);
        /**
         * counter_dealloc -De-allocate the hw counter
         */
        int (*counter_dealloc)(struct rdma_counter *counter);
        /**
         * counter_alloc_stats - Allocate a struct rdma_hw_stats and fill in
         * the driver initialized data.
         */
        struct rdma_hw_stats *(*counter_alloc_stats)(
                struct rdma_counter *counter);
        /**
         * counter_update_stats - Query the stats value of this counter
         */
        int (*counter_update_stats)(struct rdma_counter *counter);

        /**
         * Allows rdma drivers to add their own restrack attributes
         * dumped via 'rdma stat' iproute2 command.
         */
        int (*fill_stat_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);

        /* query driver for its ucontext properties */
        int (*query_ucontext)(struct ib_ucontext *context,
                              struct uverbs_attr_bundle *attrs);

        /*
         * Provide NUMA node. This API exists for rdmavt/hfi1 only.
         * Everyone else relies on Linux memory management model.
         */
        int (*get_numa_node)(struct ib_device *dev);

        DECLARE_RDMA_OBJ_SIZE(ib_ah);
        DECLARE_RDMA_OBJ_SIZE(ib_counters);
        DECLARE_RDMA_OBJ_SIZE(ib_cq);
        DECLARE_RDMA_OBJ_SIZE(ib_mw);
        DECLARE_RDMA_OBJ_SIZE(ib_pd);
        DECLARE_RDMA_OBJ_SIZE(ib_qp);
        DECLARE_RDMA_OBJ_SIZE(ib_rwq_ind_table);
        DECLARE_RDMA_OBJ_SIZE(ib_srq);
        DECLARE_RDMA_OBJ_SIZE(ib_ucontext);
        DECLARE_RDMA_OBJ_SIZE(ib_xrcd);
};

struct ib_core_device {
        /* device must be the first element in structure until,
         * union of ib_core_device and device exists in ib_device.
         */
        struct device dev;
        possible_net_t rdma_net;
        struct kobject *ports_kobj;
        struct list_head port_list;
        struct ib_device *owner; /* reach back to owner ib_device */
};

struct rdma_restrack_root;
struct ib_device {
        /* Do not access @dma_device directly from ULP nor from HW drivers. */
        struct device                *dma_device;
        struct ib_device_ops         ops;
        char                          name[IB_DEVICE_NAME_MAX];
        struct rcu_head rcu_head;

        struct list_head              event_handler_list;
        /* Protects event_handler_list */
        struct rw_semaphore event_handler_rwsem;

        /* Protects QP's event_handler calls and open_qp list */
        spinlock_t qp_open_list_lock;

        struct rw_semaphore           client_data_rwsem;
        struct xarray                 client_data;
        struct mutex                  unregistration_lock;

        /* Synchronize GID, Pkey cache entries, subnet prefix, LMC */
        rwlock_t cache_lock;
        /**
         * port_data is indexed by port number
         */
        struct ib_port_data *port_data;

        int                           num_comp_vectors;

        union {
                struct device           dev;
                struct ib_core_device   coredev;
        };

        /* First group is for device attributes,
         * Second group is for driver provided attributes (optional).
         * Third group is for the hw_stats
         * It is a NULL terminated array.
         */
        const struct attribute_group    *groups[4];

        u64                          uverbs_cmd_mask;

        char                         node_desc[IB_DEVICE_NODE_DESC_MAX];
        __be64                       node_guid;
        u32                          local_dma_lkey;
        u16                          is_switch:1;
        /* Indicates kernel verbs support, should not be used in drivers */
        u16                          kverbs_provider:1;
        /* CQ adaptive moderation (RDMA DIM) */
        u16                          use_cq_dim:1;
        u8                           node_type;
        u32                          phys_port_cnt;
        struct ib_device_attr        attrs;
        struct hw_stats_device_data *hw_stats_data;

#ifdef CONFIG_CGROUP_RDMA
        struct rdmacg_device         cg_device;
#endif

        u32                          index;

        spinlock_t                   cq_pools_lock;
        struct list_head             cq_pools[IB_POLL_LAST_POOL_TYPE + 1];

        struct rdma_restrack_root *res;

        const struct uapi_definition   *driver_def;

        /*
         * Positive refcount indicates that the device is currently
         * registered and cannot be unregistered.
         */
        refcount_t refcount;
        struct completion unreg_completion;
        struct work_struct unregistration_work;

        const struct rdma_link_ops *link_ops;

        /* Protects compat_devs xarray modifications */
        struct mutex compat_devs_mutex;
        /* Maintains compat devices for each net namespace */
        struct xarray compat_devs;

        /* Used by iWarp CM */
        char iw_ifname[IFNAMSIZ];
        u32 iw_driver_flags;
        u32 lag_flags;
};

static inline void *rdma_zalloc_obj(struct ib_device *dev, size_t size,
                                    gfp_t gfp, bool is_numa_aware)
{
        if (is_numa_aware && dev->ops.get_numa_node)
                return kzalloc_node(size, gfp, dev->ops.get_numa_node(dev));

        return kzalloc(size, gfp);
}

struct ib_client_nl_info;
struct ib_client {
        const char *name;
        int (*add)(struct ib_device *ibdev);
        void (*remove)(struct ib_device *, void *client_data);
        void (*rename)(struct ib_device *dev, void *client_data);
        int (*get_nl_info)(struct ib_device *ibdev, void *client_data,
                           struct ib_client_nl_info *res);
        int (*get_global_nl_info)(struct ib_client_nl_info *res);

        /* Returns the net_dev belonging to this ib_client and matching the
         * given parameters.
         * @dev:         An RDMA device that the net_dev use for communication.
         * @port:        A physical port number on the RDMA device.
         * @pkey:        P_Key that the net_dev uses if applicable.
         * @gid:         A GID that the net_dev uses to communicate.
         * @addr:        An IP address the net_dev is configured with.
         * @client_data: The device's client data set by ib_set_client_data().
         *
         * An ib_client that implements a net_dev on top of RDMA devices
         * (such as IP over IB) should implement this callback, allowing the
         * rdma_cm module to find the right net_dev for a given request.
         *
         * The caller is responsible for calling dev_put on the returned
         * netdev. */
        struct net_device *(*get_net_dev_by_params)(
                        struct ib_device *dev,
                        u32 port,
                        u16 pkey,
                        const union ib_gid *gid,
                        const struct sockaddr *addr,
                        void *client_data);

        refcount_t uses;
        struct completion uses_zero;
        u32 client_id;

        /* kverbs are not required by the client */
        u8 no_kverbs_req:1;
};

/*
 * IB block DMA iterator
 *
 * Iterates the DMA-mapped SGL in contiguous memory blocks aligned
 * to a HW supported page size.
 */
struct ib_block_iter {
        /* internal states */
        struct scatterlist *__sg;       /* sg holding the current aligned block */
        dma_addr_t __dma_addr;          /* unaligned DMA address of this block */
        unsigned int __sg_nents;        /* number of SG entries */
        unsigned int __sg_advance;      /* number of bytes to advance in sg in next step */
        unsigned int __pg_bit;          /* alignment of current block */
};

struct ib_device *_ib_alloc_device(size_t size);
#define ib_alloc_device(drv_struct, member)                                    \
        container_of(_ib_alloc_device(sizeof(struct drv_struct) +              \
                                      BUILD_BUG_ON_ZERO(offsetof(              \
                                              struct drv_struct, member))),    \
                     struct drv_struct, member)

void ib_dealloc_device(struct ib_device *device);

void ib_get_device_fw_str(struct ib_device *device, char *str);

int ib_register_device(struct ib_device *device, const char *name,
                       struct device *dma_device);
void ib_unregister_device(struct ib_device *device);
void ib_unregister_driver(enum rdma_driver_id driver_id);
void ib_unregister_device_and_put(struct ib_device *device);
void ib_unregister_device_queued(struct ib_device *ib_dev);

int ib_register_client   (struct ib_client *client);
void ib_unregister_client(struct ib_client *client);

void __rdma_block_iter_start(struct ib_block_iter *biter,
                             struct scatterlist *sglist,
                             unsigned int nents,
                             unsigned long pgsz);
bool __rdma_block_iter_next(struct ib_block_iter *biter);

/**
 * rdma_block_iter_dma_address - get the aligned dma address of the current
 * block held by the block iterator.
 * @biter: block iterator holding the memory block
 */
static inline dma_addr_t
rdma_block_iter_dma_address(struct ib_block_iter *biter)
{
        return biter->__dma_addr & ~(BIT_ULL(biter->__pg_bit) - 1);
}

/**
 * rdma_for_each_block - iterate over contiguous memory blocks of the sg list
 * @sglist: sglist to iterate over
 * @biter: block iterator holding the memory block
 * @nents: maximum number of sg entries to iterate over
 * @pgsz: best HW supported page size to use
 *
 * Callers may use rdma_block_iter_dma_address() to get each
 * blocks aligned DMA address.
 */
#define rdma_for_each_block(sglist, biter, nents, pgsz)         \
        for (__rdma_block_iter_start(biter, sglist, nents,      \
                                     pgsz);                     \
             __rdma_block_iter_next(biter);)

/**
 * ib_get_client_data - Get IB client context
 * @device:Device to get context for
 * @client:Client to get context for
 *
 * ib_get_client_data() returns the client context data set with
 * ib_set_client_data(). This can only be called while the client is
 * registered to the device, once the ib_client remove() callback returns this
 * cannot be called.
 */
static inline void *ib_get_client_data(struct ib_device *device,
                                       struct ib_client *client)
{
        return xa_load(&device->client_data, client->client_id);
}
void  ib_set_client_data(struct ib_device *device, struct ib_client *client,
                         void *data);
void ib_set_device_ops(struct ib_device *device,
                       const struct ib_device_ops *ops);

int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma,
                      unsigned long pfn, unsigned long size, pgprot_t prot,
                      struct rdma_user_mmap_entry *entry);
int rdma_user_mmap_entry_insert(struct ib_ucontext *ucontext,
                                struct rdma_user_mmap_entry *entry,
                                size_t length);
int rdma_user_mmap_entry_insert_range(struct ib_ucontext *ucontext,
                                      struct rdma_user_mmap_entry *entry,
                                      size_t length, u32 min_pgoff,
                                      u32 max_pgoff);

struct rdma_user_mmap_entry *
rdma_user_mmap_entry_get_pgoff(struct ib_ucontext *ucontext,
                               unsigned long pgoff);
struct rdma_user_mmap_entry *
rdma_user_mmap_entry_get(struct ib_ucontext *ucontext,
                         struct vm_area_struct *vma);
void rdma_user_mmap_entry_put(struct rdma_user_mmap_entry *entry);

void rdma_user_mmap_entry_remove(struct rdma_user_mmap_entry *entry);

static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
{
        return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
}

static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
{
        return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
}

static inline bool ib_is_buffer_cleared(const void __user *p,
                                        size_t len)
{
        bool ret;
        u8 *buf;

        if (len > USHRT_MAX)
                return false;

        buf = memdup_user(p, len);
        if (IS_ERR(buf))
                return false;

        ret = !memchr_inv(buf, 0, len);
        kfree(buf);
        return ret;
}

static inline bool ib_is_udata_cleared(struct ib_udata *udata,
                                       size_t offset,
                                       size_t len)
{
        return ib_is_buffer_cleared(udata->inbuf + offset, len);
}

/**
 * ib_modify_qp_is_ok - Check that the supplied attribute mask
 * contains all required attributes and no attributes not allowed for
 * the given QP state transition.
 * @cur_state: Current QP state
 * @next_state: Next QP state
 * @type: QP type
 * @mask: Mask of supplied QP attributes
 *
 * This function is a helper function that a low-level driver's
 * modify_qp method can use to validate the consumer's input.  It
 * checks that cur_state and next_state are valid QP states, that a
 * transition from cur_state to next_state is allowed by the IB spec,
 * and that the attribute mask supplied is allowed for the transition.
 */
bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
                        enum ib_qp_type type, enum ib_qp_attr_mask mask);

void ib_register_event_handler(struct ib_event_handler *event_handler);
void ib_unregister_event_handler(struct ib_event_handler *event_handler);
void ib_dispatch_event(const struct ib_event *event);

int ib_query_port(struct ib_device *device,
                  u32 port_num, struct ib_port_attr *port_attr);

enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
                                               u32 port_num);

/**
 * rdma_cap_ib_switch - Check if the device is IB switch
 * @device: Device to check
 *
 * Device driver is responsible for setting is_switch bit on
 * in ib_device structure at init time.
 *
 * Return: true if the device is IB switch.
 */
static inline bool rdma_cap_ib_switch(const struct ib_device *device)
{
        return device->is_switch;
}

/**
 * rdma_start_port - Return the first valid port number for the device
 * specified
 *
 * @device: Device to be checked

 *
 * Return start port number
 */
static inline u32 rdma_start_port(const struct ib_device *device)
{
        return rdma_cap_ib_switch(device) ? 0 : 1;
}

/**
 * rdma_for_each_port - Iterate over all valid port numbers of the IB device
 * @device - The struct ib_device * to iterate over
 * @iter - The unsigned int to store the port number
 */
#define rdma_for_each_port(device, iter)                                       \
        for (iter = rdma_start_port(device +                                   \
                                    BUILD_BUG_ON_ZERO(!__same_type(u32,        \
                                                                   iter)));    \
             iter <= rdma_end_port(device); iter++)

/**
 * rdma_end_port - Return the last valid port number for the device
 * specified
 *
 * @device: Device to be checked
 *
 * Return last port number
 */
static inline u32 rdma_end_port(const struct ib_device *device)
{
        return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
}

static inline int rdma_is_port_valid(const struct ib_device *device,
                                     unsigned int port)
{
        return (port >= rdma_start_port(device) &&
                port <= rdma_end_port(device));
}

static inline bool rdma_is_grh_required(const struct ib_device *device,
                                        u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_PORT_IB_GRH_REQUIRED;
}

static inline bool rdma_protocol_ib(const struct ib_device *device,
                                    u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_IB;
}

static inline bool rdma_protocol_roce(const struct ib_device *device,
                                      u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP);
}

static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device,
                                                u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
}

static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device,
                                                u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_ROCE;
}

static inline bool rdma_protocol_iwarp(const struct ib_device *device,
                                       u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_IWARP;
}

static inline bool rdma_ib_or_roce(const struct ib_device *device,
                                   u32 port_num)
{
        return rdma_protocol_ib(device, port_num) ||
                rdma_protocol_roce(device, port_num);
}

static inline bool rdma_protocol_raw_packet(const struct ib_device *device,
                                            u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_RAW_PACKET;
}

static inline bool rdma_protocol_usnic(const struct ib_device *device,
                                       u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_PROT_USNIC;
}

/**
 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband
 * Management Datagrams.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * Management Datagrams (MAD) are a required part of the InfiniBand
 * specification and are supported on all InfiniBand devices.  A slightly
 * extended version are also supported on OPA interfaces.
 *
 * Return: true if the port supports sending/receiving of MAD packets.
 */
static inline bool rdma_cap_ib_mad(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_IB_MAD;
}

/**
 * rdma_cap_opa_mad - Check if the port of device provides support for OPA
 * Management Datagrams.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * Intel OmniPath devices extend and/or replace the InfiniBand Management
 * datagrams with their own versions.  These OPA MADs share many but not all of
 * the characteristics of InfiniBand MADs.
 *
 * OPA MADs differ in the following ways:
 *
 *    1) MADs are variable size up to 2K
 *       IBTA defined MADs remain fixed at 256 bytes
 *    2) OPA SMPs must carry valid PKeys
 *    3) OPA SMP packets are a different format
 *
 * Return: true if the port supports OPA MAD packet formats.
 */
static inline bool rdma_cap_opa_mad(struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
                RDMA_CORE_CAP_OPA_MAD;
}

/**
 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband
 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI).
 * @device: Device to check
 * @port_num: Port number to check
 *
 * Each InfiniBand node is required to provide a Subnet Management Agent
 * that the subnet manager can access.  Prior to the fabric being fully
 * configured by the subnet manager, the SMA is accessed via a well known
 * interface called the Subnet Management Interface (SMI).  This interface
 * uses directed route packets to communicate with the SM to get around the
 * chicken and egg problem of the SM needing to know what's on the fabric
 * in order to configure the fabric, and needing to configure the fabric in
 * order to send packets to the devices on the fabric.  These directed
 * route packets do not need the fabric fully configured in order to reach
 * their destination.  The SMI is the only method allowed to send
 * directed route packets on an InfiniBand fabric.
 *
 * Return: true if the port provides an SMI.
 */
static inline bool rdma_cap_ib_smi(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_IB_SMI;
}

/**
 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband
 * Communication Manager.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * The InfiniBand Communication Manager is one of many pre-defined General
 * Service Agents (GSA) that are accessed via the General Service
 * Interface (GSI).  It's role is to facilitate establishment of connections
 * between nodes as well as other management related tasks for established
 * connections.
 *
 * Return: true if the port supports an IB CM (this does not guarantee that
 * a CM is actually running however).
 */
static inline bool rdma_cap_ib_cm(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_IB_CM;
}

/**
 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP
 * Communication Manager.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * Similar to above, but specific to iWARP connections which have a different
 * managment protocol than InfiniBand.
 *
 * Return: true if the port supports an iWARP CM (this does not guarantee that
 * a CM is actually running however).
 */
static inline bool rdma_cap_iw_cm(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_IW_CM;
}

/**
 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband
 * Subnet Administration.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * An InfiniBand Subnet Administration (SA) service is a pre-defined General
 * Service Agent (GSA) provided by the Subnet Manager (SM).  On InfiniBand
 * fabrics, devices should resolve routes to other hosts by contacting the
 * SA to query the proper route.
 *
 * Return: true if the port should act as a client to the fabric Subnet
 * Administration interface.  This does not imply that the SA service is
 * running locally.
 */
static inline bool rdma_cap_ib_sa(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_IB_SA;
}

/**
 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband
 * Multicast.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * InfiniBand multicast registration is more complex than normal IPv4 or
 * IPv6 multicast registration.  Each Host Channel Adapter must register
 * with the Subnet Manager when it wishes to join a multicast group.  It
 * should do so only once regardless of how many queue pairs it subscribes
 * to this group.  And it should leave the group only after all queue pairs
 * attached to the group have been detached.
 *
 * Return: true if the port must undertake the additional adminstrative
 * overhead of registering/unregistering with the SM and tracking of the
 * total number of queue pairs attached to the multicast group.
 */
static inline bool rdma_cap_ib_mcast(const struct ib_device *device,
                                     u32 port_num)
{
        return rdma_cap_ib_sa(device, port_num);
}

/**
 * rdma_cap_af_ib - Check if the port of device has the capability
 * Native Infiniband Address.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default
 * GID.  RoCE uses a different mechanism, but still generates a GID via
 * a prescribed mechanism and port specific data.
 *
 * Return: true if the port uses a GID address to identify devices on the
 * network.
 */
static inline bool rdma_cap_af_ib(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_AF_IB;
}

/**
 * rdma_cap_eth_ah - Check if the port of device has the capability
 * Ethernet Address Handle.
 * @device: Device to check
 * @port_num: Port number to check
 *
 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique
 * to fabricate GIDs over Ethernet/IP specific addresses native to the
 * port.  Normally, packet headers are generated by the sending host
 * adapter, but when sending connectionless datagrams, we must manually
 * inject the proper headers for the fabric we are communicating over.
 *
 * Return: true if we are running as a RoCE port and must force the
 * addition of a Global Route Header built from our Ethernet Address
 * Handle into our header list for connectionless packets.
 */
static inline bool rdma_cap_eth_ah(const struct ib_device *device, u32 port_num)
{
        return device->port_data[port_num].immutable.core_cap_flags &
               RDMA_CORE_CAP_ETH_AH;
}

/**
 * rdma_cap_opa_ah - Check if the port of device supports
 * OPA Address handles
 * @device: Device to check
 * @port_num: Port number to check
 *
 * Return: true if we are running on an OPA device which supports
 * the extended OPA addressing.
 */
static inline bool rdma_cap_opa_ah(struct ib_device *device, u32 port_num)
{
        return (device->port_data[port_num].immutable.core_cap_flags &
                RDMA_CORE_CAP_OPA_AH) == RDMA_CORE_CAP_OPA_AH;
}

/**
 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
 *
 * @device: Device
 * @port_num: Port number
 *
 * This MAD size includes the MAD headers and MAD payload.  No other headers
 * are included.
 *
 * Return the max MAD size required by the Port.  Will return 0 if the port
 * does not support MADs
 */
static inline size_t rdma_max_mad_size(const struct ib_device *device,
                                       u32 port_num)
{
        return device->port_data[port_num].immutable.max_mad_size;
}

/**
 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
 * @device: Device to check
 * @port_num: Port number to check
 *
 * RoCE GID table mechanism manages the various GIDs for a device.
 *
 * NOTE: if allocating the port's GID table has failed, this call will still
 * return true, but any RoCE GID table API will fail.
 *
 * Return: true if the port uses RoCE GID table mechanism in order to manage
 * its GIDs.
 */
static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
                                           u32 port_num)
{
        return rdma_protocol_roce(device, port_num) &&
                device->ops.add_gid && device->ops.del_gid;
}

/*
 * Check if the device supports READ W/ INVALIDATE.
 */
static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num)
{
        /*
         * iWarp drivers must support READ W/ INVALIDATE.  No other protocol
         * has support for it yet.
         */
        return rdma_protocol_iwarp(dev, port_num);
}

/**
 * rdma_core_cap_opa_port - Return whether the RDMA Port is OPA or not.
 * @device: Device
 * @port_num: 1 based Port number
 *
 * Return true if port is an Intel OPA port , false if not
 */
static inline bool rdma_core_cap_opa_port(struct ib_device *device,
                                          u32 port_num)
{
        return (device->port_data[port_num].immutable.core_cap_flags &
                RDMA_CORE_PORT_INTEL_OPA) == RDMA_CORE_PORT_INTEL_OPA;
}

/**
 * rdma_mtu_enum_to_int - Return the mtu of the port as an integer value.
 * @device: Device
 * @port_num: Port number
 * @mtu: enum value of MTU
 *
 * Return the MTU size supported by the port as an integer value. Will return
 * -1 if enum value of mtu is not supported.
 */
static inline int rdma_mtu_enum_to_int(struct ib_device *device, u32 port,
                                       int mtu)
{
        if (rdma_core_cap_opa_port(device, port))
                return opa_mtu_enum_to_int((enum opa_mtu)mtu);
        else
                return ib_mtu_enum_to_int((enum ib_mtu)mtu);
}

/**
 * rdma_mtu_from_attr - Return the mtu of the port from the port attribute.
 * @device: Device
 * @port_num: Port number
 * @attr: port attribute
 *
 * Return the MTU size supported by the port as an integer value.
 */
static inline int rdma_mtu_from_attr(struct ib_device *device, u32 port,
                                     struct ib_port_attr *attr)
{
        if (rdma_core_cap_opa_port(device, port))
                return attr->phys_mtu;
        else
                return ib_mtu_enum_to_int(attr->max_mtu);
}

int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port,
                         int state);
int ib_get_vf_config(struct ib_device *device, int vf, u32 port,
                     struct ifla_vf_info *info);
int ib_get_vf_stats(struct ib_device *device, int vf, u32 port,
                    struct ifla_vf_stats *stats);
int ib_get_vf_guid(struct ib_device *device, int vf, u32 port,
                    struct ifla_vf_guid *node_guid,
                    struct ifla_vf_guid *port_guid);
int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid,
                   int type);

int ib_query_pkey(struct ib_device *device,
                  u32 port_num, u16 index, u16 *pkey);

int ib_modify_device(struct ib_device *device,
                     int device_modify_mask,
                     struct ib_device_modify *device_modify);

int ib_modify_port(struct ib_device *device,
                   u32 port_num, int port_modify_mask,
                   struct ib_port_modify *port_modify);

int ib_find_gid(struct ib_device *device, union ib_gid *gid,
                u32 *port_num, u16 *index);

int ib_find_pkey(struct ib_device *device,
                 u32 port_num, u16 pkey, u16 *index);

enum ib_pd_flags {
        /*
         * Create a memory registration for all memory in the system and place
         * the rkey for it into pd->unsafe_global_rkey.  This can be used by
         * ULPs to avoid the overhead of dynamic MRs.
         *
         * This flag is generally considered unsafe and must only be used in
         * extremly trusted environments.  Every use of it will log a warning
         * in the kernel log.
         */
        IB_PD_UNSAFE_GLOBAL_RKEY        = 0x01,
};

struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
                const char *caller);

/**
 * ib_alloc_pd - Allocates an unused protection domain.
 * @device: The device on which to allocate the protection domain.
 * @flags: protection domain flags
 *
 * A protection domain object provides an association between QPs, shared
 * receive queues, address handles, memory regions, and memory windows.
 *
 * Every PD has a local_dma_lkey which can be used as the lkey value for local
 * memory operations.
 */
#define ib_alloc_pd(device, flags) \
        __ib_alloc_pd((device), (flags), KBUILD_MODNAME)

int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata);

/**
 * ib_dealloc_pd - Deallocate kernel PD
 * @pd: The protection domain
 *
 * NOTE: for user PD use ib_dealloc_pd_user with valid udata!
 */
static inline void ib_dealloc_pd(struct ib_pd *pd)
{
        int ret = ib_dealloc_pd_user(pd, NULL);

        WARN_ONCE(ret, "Destroy of kernel PD shouldn't fail");
}

enum rdma_create_ah_flags {
        /* In a sleepable context */
        RDMA_CREATE_AH_SLEEPABLE = BIT(0),
};

/**
 * rdma_create_ah - Creates an address handle for the given address vector.
 * @pd: The protection domain associated with the address handle.
 * @ah_attr: The attributes of the address vector.
 * @flags: Create address handle flags (see enum rdma_create_ah_flags).
 *
 * The address handle is used to reference a local or global destination
 * in all UD QP post sends.
 */
struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
                             u32 flags);

/**
 * rdma_create_user_ah - Creates an address handle for the given address vector.
 * It resolves destination mac address for ah attribute of RoCE type.
 * @pd: The protection domain associated with the address handle.
 * @ah_attr: The attributes of the address vector.
 * @udata: pointer to user's input output buffer information need by
 *         provider driver.
 *
 * It returns 0 on success and returns appropriate error code on error.
 * The address handle is used to reference a local or global destination
 * in all UD QP post sends.
 */
struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
                                  struct rdma_ah_attr *ah_attr,
                                  struct ib_udata *udata);
/**
 * ib_get_gids_from_rdma_hdr - Get sgid and dgid from GRH or IPv4 header
 *   work completion.
 * @hdr: the L3 header to parse
 * @net_type: type of header to parse
 * @sgid: place to store source gid
 * @dgid: place to store destination gid
 */
int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
                              enum rdma_network_type net_type,
                              union ib_gid *sgid, union ib_gid *dgid);

/**
 * ib_get_rdma_header_version - Get the header version
 * @hdr: the L3 header to parse
 */
int ib_get_rdma_header_version(const union rdma_network_hdr *hdr);

/**
 * ib_init_ah_attr_from_wc - Initializes address handle attributes from a
 *   work completion.
 * @device: Device on which the received message arrived.
 * @port_num: Port on which the received message arrived.
 * @wc: Work completion associated with the received message.
 * @grh: References the received global route header.  This parameter is
 *   ignored unless the work completion indicates that the GRH is valid.
 * @ah_attr: Returned attributes that can be used when creating an address
 *   handle for replying to the message.
 * When ib_init_ah_attr_from_wc() returns success,
 * (a) for IB link layer it optionally contains a reference to SGID attribute
 * when GRH is present for IB link layer.
 * (b) for RoCE link layer it contains a reference to SGID attribute.
 * User must invoke rdma_cleanup_ah_attr_gid_attr() to release reference to SGID
 * attributes which are initialized using ib_init_ah_attr_from_wc().
 *
 */
int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num,
                            const struct ib_wc *wc, const struct ib_grh *grh,
                            struct rdma_ah_attr *ah_attr);

/**
 * ib_create_ah_from_wc - Creates an address handle associated with the
 *   sender of the specified work completion.
 * @pd: The protection domain associated with the address handle.
 * @wc: Work completion information associated with a received message.
 * @grh: References the received global route header.  This parameter is
 *   ignored unless the work completion indicates that the GRH is valid.
 * @port_num: The outbound port number to associate with the address.
 *
 * The address handle is used to reference a local or global destination
 * in all UD QP post sends.
 */
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
                                   const struct ib_grh *grh, u32 port_num);

/**
 * rdma_modify_ah - Modifies the address vector associated with an address
 *   handle.
 * @ah: The address handle to modify.
 * @ah_attr: The new address vector attributes to associate with the
 *   address handle.
 */
int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);

/**
 * rdma_query_ah - Queries the address vector associated with an address
 *   handle.
 * @ah: The address handle to query.
 * @ah_attr: The address vector attributes associated with the address
 *   handle.
 */
int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);

enum rdma_destroy_ah_flags {
        /* In a sleepable context */
        RDMA_DESTROY_AH_SLEEPABLE = BIT(0),
};

/**
 * rdma_destroy_ah_user - Destroys an address handle.
 * @ah: The address handle to destroy.
 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags).
 * @udata: Valid user data or NULL for kernel objects
 */
int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata);

/**
 * rdma_destroy_ah - Destroys an kernel address handle.
 * @ah: The address handle to destroy.
 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags).
 *
 * NOTE: for user ah use rdma_destroy_ah_user with valid udata!
 */
static inline void rdma_destroy_ah(struct ib_ah *ah, u32 flags)
{
        int ret = rdma_destroy_ah_user(ah, flags, NULL);

        WARN_ONCE(ret, "Destroy of kernel AH shouldn't fail");
}

struct ib_srq *ib_create_srq_user(struct ib_pd *pd,
                                  struct ib_srq_init_attr *srq_init_attr,
                                  struct ib_usrq_object *uobject,
                                  struct ib_udata *udata);
static inline struct ib_srq *
ib_create_srq(struct ib_pd *pd, struct ib_srq_init_attr *srq_init_attr)
{
        if (!pd->device->ops.create_srq)
                return ERR_PTR(-EOPNOTSUPP);

        return ib_create_srq_user(pd, srq_init_attr, NULL, NULL);
}

/**
 * ib_modify_srq - Modifies the attributes for the specified SRQ.
 * @srq: The SRQ to modify.
 * @srq_attr: On input, specifies the SRQ attributes to modify.  On output,
 *   the current values of selected SRQ attributes are returned.
 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
 *   are being modified.
 *
 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
 * the number of receives queued drops below the limit.
 */
int ib_modify_srq(struct ib_srq *srq,
                  struct ib_srq_attr *srq_attr,
                  enum ib_srq_attr_mask srq_attr_mask);

/**
 * ib_query_srq - Returns the attribute list and current values for the
 *   specified SRQ.
 * @srq: The SRQ to query.
 * @srq_attr: The attributes of the specified SRQ.
 */
int ib_query_srq(struct ib_srq *srq,
                 struct ib_srq_attr *srq_attr);

/**
 * ib_destroy_srq_user - Destroys the specified SRQ.
 * @srq: The SRQ to destroy.
 * @udata: Valid user data or NULL for kernel objects
 */
int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata);

/**
 * ib_destroy_srq - Destroys the specified kernel SRQ.
 * @srq: The SRQ to destroy.
 *
 * NOTE: for user srq use ib_destroy_srq_user with valid udata!
 */
static inline void ib_destroy_srq(struct ib_srq *srq)
{
        int ret = ib_destroy_srq_user(srq, NULL);

        WARN_ONCE(ret, "Destroy of kernel SRQ shouldn't fail");
}

/**
 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
 * @srq: The SRQ to post the work request on.
 * @recv_wr: A list of work requests to post on the receive queue.
 * @bad_recv_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 */
static inline int ib_post_srq_recv(struct ib_srq *srq,
                                   const struct ib_recv_wr *recv_wr,
                                   const struct ib_recv_wr **bad_recv_wr)
{
        const struct ib_recv_wr *dummy;

        return srq->device->ops.post_srq_recv(srq, recv_wr,
                                              bad_recv_wr ? : &dummy);
}

struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
                                  struct ib_qp_init_attr *qp_init_attr,
                                  const char *caller);
/**
 * ib_create_qp - Creates a kernel QP associated with the specific protection
 * domain.
 * @pd: The protection domain associated with the QP.
 * @init_attr: A list of initial attributes required to create the
 *   QP.  If QP creation succeeds, then the attributes are updated to
 *   the actual capabilities of the created QP.
 */
static inline struct ib_qp *ib_create_qp(struct ib_pd *pd,
                                         struct ib_qp_init_attr *init_attr)
{
        return ib_create_qp_kernel(pd, init_attr, KBUILD_MODNAME);
}

/**
 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
 * @qp: The QP to modify.
 * @attr: On input, specifies the QP attributes to modify.  On output,
 *   the current values of selected QP attributes are returned.
 * @attr_mask: A bit-mask used to specify which attributes of the QP
 *   are being modified.
 * @udata: pointer to user's input output buffer information
 *   are being modified.
 * It returns 0 on success and returns appropriate error code on error.
 */
int ib_modify_qp_with_udata(struct ib_qp *qp,
                            struct ib_qp_attr *attr,
                            int attr_mask,
                            struct ib_udata *udata);

/**
 * ib_modify_qp - Modifies the attributes for the specified QP and then
 *   transitions the QP to the given state.
 * @qp: The QP to modify.
 * @qp_attr: On input, specifies the QP attributes to modify.  On output,
 *   the current values of selected QP attributes are returned.
 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
 *   are being modified.
 */
int ib_modify_qp(struct ib_qp *qp,
                 struct ib_qp_attr *qp_attr,
                 int qp_attr_mask);

/**
 * ib_query_qp - Returns the attribute list and current values for the
 *   specified QP.
 * @qp: The QP to query.
 * @qp_attr: The attributes of the specified QP.
 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
 * @qp_init_attr: Additional attributes of the selected QP.
 *
 * The qp_attr_mask may be used to limit the query to gathering only the
 * selected attributes.
 */
int ib_query_qp(struct ib_qp *qp,
                struct ib_qp_attr *qp_attr,
                int qp_attr_mask,
                struct ib_qp_init_attr *qp_init_attr);

/**
 * ib_destroy_qp - Destroys the specified QP.
 * @qp: The QP to destroy.
 * @udata: Valid udata or NULL for kernel objects
 */
int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata);

/**
 * ib_destroy_qp - Destroys the specified kernel QP.
 * @qp: The QP to destroy.
 *
 * NOTE: for user qp use ib_destroy_qp_user with valid udata!
 */
static inline int ib_destroy_qp(struct ib_qp *qp)
{
        return ib_destroy_qp_user(qp, NULL);
}

/**
 * ib_open_qp - Obtain a reference to an existing sharable QP.
 * @xrcd - XRC domain
 * @qp_open_attr: Attributes identifying the QP to open.
 *
 * Returns a reference to a sharable QP.
 */
struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
                         struct ib_qp_open_attr *qp_open_attr);

/**
 * ib_close_qp - Release an external reference to a QP.
 * @qp: The QP handle to release
 *
 * The opened QP handle is released by the caller.  The underlying
 * shared QP is not destroyed until all internal references are released.
 */
int ib_close_qp(struct ib_qp *qp);

/**
 * ib_post_send - Posts a list of work requests to the send queue of
 *   the specified QP.
 * @qp: The QP to post the work request on.
 * @send_wr: A list of work requests to post on the send queue.
 * @bad_send_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 *
 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
 * error is returned, the QP state shall not be affected,
 * ib_post_send() will return an immediate error after queueing any
 * earlier work requests in the list.
 */
static inline int ib_post_send(struct ib_qp *qp,
                               const struct ib_send_wr *send_wr,
                               const struct ib_send_wr **bad_send_wr)
{
        const struct ib_send_wr *dummy;

        return qp->device->ops.post_send(qp, send_wr, bad_send_wr ? : &dummy);
}

/**
 * ib_post_recv - Posts a list of work requests to the receive queue of
 *   the specified QP.
 * @qp: The QP to post the work request on.
 * @recv_wr: A list of work requests to post on the receive queue.
 * @bad_recv_wr: On an immediate failure, this parameter will reference
 *   the work request that failed to be posted on the QP.
 */
static inline int ib_post_recv(struct ib_qp *qp,
                               const struct ib_recv_wr *recv_wr,
                               const struct ib_recv_wr **bad_recv_wr)
{
        const struct ib_recv_wr *dummy;

        return qp->device->ops.post_recv(qp, recv_wr, bad_recv_wr ? : &dummy);
}

struct ib_cq *__ib_alloc_cq(struct ib_device *dev, void *private, int nr_cqe,
                            int comp_vector, enum ib_poll_context poll_ctx,
                            const char *caller);
static inline struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private,
                                        int nr_cqe, int comp_vector,
                                        enum ib_poll_context poll_ctx)
{
        return __ib_alloc_cq(dev, private, nr_cqe, comp_vector, poll_ctx,
                             KBUILD_MODNAME);
}

struct ib_cq *__ib_alloc_cq_any(struct ib_device *dev, void *private,
                                int nr_cqe, enum ib_poll_context poll_ctx,
                                const char *caller);

/**
 * ib_alloc_cq_any: Allocate kernel CQ
 * @dev: The IB device
 * @private: Private data attached to the CQE
 * @nr_cqe: Number of CQEs in the CQ
 * @poll_ctx: Context used for polling the CQ
 */
static inline struct ib_cq *ib_alloc_cq_any(struct ib_device *dev,
                                            void *private, int nr_cqe,
                                            enum ib_poll_context poll_ctx)
{
        return __ib_alloc_cq_any(dev, private, nr_cqe, poll_ctx,
                                 KBUILD_MODNAME);
}

void ib_free_cq(struct ib_cq *cq);
int ib_process_cq_direct(struct ib_cq *cq, int budget);

/**
 * ib_create_cq - Creates a CQ on the specified device.
 * @device: The device on which to create the CQ.
 * @comp_handler: A user-specified callback that is invoked when a
 *   completion event occurs on the CQ.
 * @event_handler: A user-specified callback that is invoked when an
 *   asynchronous event not associated with a completion occurs on the CQ.
 * @cq_context: Context associated with the CQ returned to the user via
 *   the associated completion and event handlers.
 * @cq_attr: The attributes the CQ should be created upon.
 *
 * Users can examine the cq structure to determine the actual CQ size.
 */
struct ib_cq *__ib_create_cq(struct ib_device *device,
                             ib_comp_handler comp_handler,
                             void (*event_handler)(struct ib_event *, void *),
                             void *cq_context,
                             const struct ib_cq_init_attr *cq_attr,
                             const char *caller);
#define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \
        __ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), KBUILD_MODNAME)

/**
 * ib_resize_cq - Modifies the capacity of the CQ.
 * @cq: The CQ to resize.
 * @cqe: The minimum size of the CQ.
 *
 * Users can examine the cq structure to determine the actual CQ size.
 */
int ib_resize_cq(struct ib_cq *cq, int cqe);

/**
 * rdma_set_cq_moderation - Modifies moderation params of the CQ
 * @cq: The CQ to modify.
 * @cq_count: number of CQEs that will trigger an event
 * @cq_period: max period of time in usec before triggering an event
 *
 */
int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period);

/**
 * ib_destroy_cq_user - Destroys the specified CQ.
 * @cq: The CQ to destroy.
 * @udata: Valid user data or NULL for kernel objects
 */
int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata);

/**
 * ib_destroy_cq - Destroys the specified kernel CQ.
 * @cq: The CQ to destroy.
 *
 * NOTE: for user cq use ib_destroy_cq_user with valid udata!
 */
static inline void ib_destroy_cq(struct ib_cq *cq)
{
        int ret = ib_destroy_cq_user(cq, NULL);

        WARN_ONCE(ret, "Destroy of kernel CQ shouldn't fail");
}

/**
 * ib_poll_cq - poll a CQ for completion(s)
 * @cq:the CQ being polled
 * @num_entries:maximum number of completions to return
 * @wc:array of at least @num_entries &struct ib_wc where completions
 *   will be returned
 *
 * Poll a CQ for (possibly multiple) completions.  If the return value
 * is < 0, an error occurred.  If the return value is >= 0, it is the
 * number of completions returned.  If the return value is
 * non-negative and < num_entries, then the CQ was emptied.
 */
static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
                             struct ib_wc *wc)
{
        return cq->device->ops.poll_cq(cq, num_entries, wc);
}

/**
 * ib_req_notify_cq - Request completion notification on a CQ.
 * @cq: The CQ to generate an event for.
 * @flags:
 *   Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
 *   to request an event on the next solicited event or next work
 *   completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
 *   may also be |ed in to request a hint about missed events, as
 *   described below.
 *
 * Return Value:
 *    < 0 means an error occurred while requesting notification
 *   == 0 means notification was requested successfully, and if
 *        IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
 *        were missed and it is safe to wait for another event.  In
 *        this case is it guaranteed that any work completions added
 *        to the CQ since the last CQ poll will trigger a completion
 *        notification event.
 *    > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
 *        in.  It means that the consumer must poll the CQ again to
 *        make sure it is empty to avoid missing an event because of a
 *        race between requesting notification and an entry being
 *        added to the CQ.  This return value means it is possible
 *        (but not guaranteed) that a work completion has been added
 *        to the CQ since the last poll without triggering a
 *        completion notification event.
 */
static inline int ib_req_notify_cq(struct ib_cq *cq,
                                   enum ib_cq_notify_flags flags)
{
        return cq->device->ops.req_notify_cq(cq, flags);
}

struct ib_cq *ib_cq_pool_get(struct ib_device *dev, unsigned int nr_cqe,
                             int comp_vector_hint,
                             enum ib_poll_context poll_ctx);

void ib_cq_pool_put(struct ib_cq *cq, unsigned int nr_cqe);

/*
 * Drivers that don't need a DMA mapping at the RDMA layer, set dma_device to
 * NULL. This causes the ib_dma* helpers to just stash the kernel virtual
 * address into the dma address.
 */
static inline bool ib_uses_virt_dma(struct ib_device *dev)
{
        return IS_ENABLED(CONFIG_INFINIBAND_VIRT_DMA) && !dev->dma_device;
}

/**
 * ib_dma_mapping_error - check a DMA addr for error
 * @dev: The device for which the dma_addr was created
 * @dma_addr: The DMA address to check
 */
static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
{
        if (ib_uses_virt_dma(dev))
                return 0;
        return dma_mapping_error(dev->dma_device, dma_addr);
}