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 /* 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 = IB_UVERBS_DEVICE_RESIZE_MAX_WR,
     IB_DEVICE_BAD_PKEY_CNTR = IB_UVERBS_DEVICE_BAD_PKEY_CNTR,
     IB_DEVICE_BAD_QKEY_CNTR = IB_UVERBS_DEVICE_BAD_QKEY_CNTR,
     IB_DEVICE_RAW_MULTI = IB_UVERBS_DEVICE_RAW_MULTI,
     IB_DEVICE_AUTO_PATH_MIG = IB_UVERBS_DEVICE_AUTO_PATH_MIG,
     IB_DEVICE_CHANGE_PHY_PORT = IB_UVERBS_DEVICE_CHANGE_PHY_PORT,
     IB_DEVICE_UD_AV_PORT_ENFORCE = IB_UVERBS_DEVICE_UD_AV_PORT_ENFORCE,
     IB_DEVICE_CURR_QP_STATE_MOD = IB_UVERBS_DEVICE_CURR_QP_STATE_MOD,
     IB_DEVICE_SHUTDOWN_PORT = IB_UVERBS_DEVICE_SHUTDOWN_PORT,
     /* IB_DEVICE_INIT_TYPE = IB_UVERBS_DEVICE_INIT_TYPE, (not in use) */
     IB_DEVICE_PORT_ACTIVE_EVENT = IB_UVERBS_DEVICE_PORT_ACTIVE_EVENT,
     IB_DEVICE_SYS_IMAGE_GUID = IB_UVERBS_DEVICE_SYS_IMAGE_GUID,
     IB_DEVICE_RC_RNR_NAK_GEN = IB_UVERBS_DEVICE_RC_RNR_NAK_GEN,
     IB_DEVICE_SRQ_RESIZE = IB_UVERBS_DEVICE_SRQ_RESIZE,
     IB_DEVICE_N_NOTIFY_CQ = IB_UVERBS_DEVICE_N_NOTIFY_CQ,
 
     /* Reserved, old SEND_W_INV = 1 << 16,*/
     IB_DEVICE_MEM_WINDOW = IB_UVERBS_DEVICE_MEM_WINDOW,
     /*
      * 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 = IB_UVERBS_DEVICE_UD_IP_CSUM,
     IB_DEVICE_XRC = IB_UVERBS_DEVICE_XRC,
 
     /*
      * 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 = IB_UVERBS_DEVICE_MEM_MGT_EXTENSIONS,
     IB_DEVICE_MEM_WINDOW_TYPE_2A = IB_UVERBS_DEVICE_MEM_WINDOW_TYPE_2A,
     IB_DEVICE_MEM_WINDOW_TYPE_2B = IB_UVERBS_DEVICE_MEM_WINDOW_TYPE_2B,
     IB_DEVICE_RC_IP_CSUM = IB_UVERBS_DEVICE_RC_IP_CSUM,
     /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */
     IB_DEVICE_RAW_IP_CSUM = IB_UVERBS_DEVICE_RAW_IP_CSUM,
     IB_DEVICE_MANAGED_FLOW_STEERING =
         IB_UVERBS_DEVICE_MANAGED_FLOW_STEERING,
     /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */
     IB_DEVICE_RAW_SCATTER_FCS = IB_UVERBS_DEVICE_RAW_SCATTER_FCS,
     /* The device supports padding incoming writes to cacheline. */
     IB_DEVICE_PCI_WRITE_END_PADDING =
         IB_UVERBS_DEVICE_PCI_WRITE_END_PADDING,
 };
 
 enum ib_kernel_cap_flags {
     /*
      * 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.
      */
     IBK_LOCAL_DMA_LKEY = 1 << 0,
     /* IB_QP_CREATE_INTEGRITY_EN is supported to implement T10-PI */
     IBK_INTEGRITY_HANDOVER = 1 << 1,
     /* IB_ACCESS_ON_DEMAND is supported during reg_user_mr() */
     IBK_ON_DEMAND_PAGING = 1 << 2,
     /* IB_MR_TYPE_SG_GAPS is supported */
     IBK_SG_GAPS_REG = 1 << 3,
     /* Driver supports RDMA_NLDEV_CMD_DELLINK */
     IBK_ALLOW_USER_UNREG = 1 << 4,
 
     /* ipoib will use IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK */
     IBK_BLOCK_MULTICAST_LOOPBACK = 1 << 5,
     /* iopib will use IB_QP_CREATE_IPOIB_UD_LSO for its QPs */
     IBK_UD_TSO = 1 << 6,
     /* iopib will use the device ops:
      *   get_vf_config
      *   get_vf_guid
      *   get_vf_stats
      *   set_vf_guid
      *   set_vf_link_state
      */
     IBK_VIRTUAL_FUNCTION = 1 << 7,
     /* ipoib will use IB_QP_CREATE_NETDEV_USE for its QPs */
     IBK_RDMA_NETDEV_OPA = 1 << 8,
 };
 
 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;
     u64         kernel_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,
 };
 
 enum ib_stat_flag {
     IB_STAT_FLAG_OPTIONAL = 1 << 0,
 };
 
 /**
  * struct rdma_stat_desc
  * @name - The name of the counter
  * @flags - Flags of the counter; For example, IB_STAT_FLAG_OPTIONAL
  * @priv - Driver private information; Core code should not use
  */
 struct rdma_stat_desc {
     const char *name;
     unsigned int flags;
     const void *priv;
 };
 
 /**
  * struct rdma_hw_stats
  * @lock - Mutex to protect parallel write access to lifespan and values
  *    of counters, which are 64bits and not guaranteed 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.
  * @descs - Array of pointers to static descriptors used for the counters
  *   in directory.
  * @is_disabled - A bitmap to indicate each counter is currently disabled
  *   or not.
  * @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 struct rdma_stat_desc *descs;
     unsigned long   *is_disabled;
     int     num_counters;
     u64     value[];
 };
 
 #define RDMA_HW_STATS_DEFAULT_LIFESPAN 10
 
 struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
     const struct rdma_stat_desc *descs, int num_counters,
     unsigned long lifespan);
 
 void rdma_free_hw_stats_struct(struct rdma_hw_stats *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 =
         IB_UVERBS_RAW_PACKET_CAP_CVLAN_STRIPPING,
     /*
      * Scatter FCS field of an incoming packet to host memory is supported.
      */
     IB_RAW_PACKET_CAP_SCATTER_FCS = IB_UVERBS_RAW_PACKET_CAP_SCATTER_FCS,
     /* Checksum offloads are supported (for both send and receive). */
     IB_RAW_PACKET_CAP_IP_CSUM = IB_UVERBS_RAW_PACKET_CAP_IP_CSUM,
     /*
      * When a packet is received for an RQ with no receive WQEs, the
      * packet processing is delayed.
      */
     IB_RAW_PACKET_CAP_DELAY_DROP = IB_UVERBS_RAW_PACKET_CAP_DELAY_DROP,
 };
 
 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);
     int (*destroy_flow_action)(struct ib_flow_action *action);
     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);
 
     /**
      * modify_hw_stat - Modify the counter configuration
      * @enable: true/false when enable/disable a counter
      * Return codes - 0 on success or error code otherwise.
      */
     int (*modify_hw_stat)(struct ib_device *device, u32 port,
                   unsigned int counter_index, bool enable);
     /**
      * 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);
 
 static inline int
 rdma_user_mmap_entry_insert_exact(struct ib_ucontext *ucontext,
                   struct rdma_user_mmap_entry *entry,
                   size_t length, u32 pgoff)
 {
     return rdma_user_mmap_entry_insert_range(ucontext, entry, length, pgoff,
                          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;
 }
 
 /*
  * Check if a IB device's underlying DMA mapping supports P2PDMA transfers.
  */
 static inline bool ib_dma_pci_p2p_dma_supported(struct ib_device *dev)
 {
     if (ib_uses_virt_dma(dev))
         return false;
 
     return dma_pci_p2pdma_supported(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);
 }
 
 /**
  * ib_dma_map_single - Map a kernel virtual address to DMA address
  * @dev: The device for which the dma_addr is to be created
  * @cpu_addr: The kernel virtual address
  * @size: The size of the region in bytes
  * @direction: The direction of the DMA
  */
 static inline u64 ib_dma_map_single(struct ib_device *dev,
                     void *cpu_addr, size_t size,
                     enum dma_data_direction direction)
 {
     if (ib_uses_virt_dma(dev))
         return (uintptr_t)cpu_addr;
     return dma_map_single(dev->dma_device, cpu_addr, size, direction);
 }
 
 /**
  * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
  * @dev: The device for which the DMA address was created
  * @addr: The DMA address
  * @size: The size of the region in bytes
  * @direction: The direction of the DMA
  */
 static inline void ib_dma_unmap_single(struct ib_device *dev,
                        u64 addr, size_t size,
                        enum dma_data_direction direction)
 {
     if (!ib_uses_virt_dma(dev))
         dma_unmap_single(dev->dma_device, addr, size, direction);
 }
 
 /**
  * ib_dma_map_page - Map a physical page to DMA address
  * @dev: The device for which the dma_addr is to be created
  * @page: The page to be mapped
  * @offset: The offset within the page
  * @size: The size of the region in bytes
  * @direction: The direction of the DMA
  */
 static inline u64 ib_dma_map_page(struct ib_device *dev,
                   struct page *page,
                   unsigned long offset,
                   size_t size,
                      enum dma_data_direction direction)
 {
     if (ib_uses_virt_dma(dev))
         return (uintptr_t)(page_address(page) + offset);
     return dma_map_page(dev->dma_device, page, offset, size, direction);
 }
 
 /**
  * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
  * @dev: The device for which the DMA address was created
  * @addr: The DMA address
  * @size: The size of the region in bytes
  * @direction: The direction of the DMA
  */
 static inline void ib_dma_unmap_page(struct ib_device *dev,
                      u64 addr, size_t size,
                      enum dma_data_direction direction)
 {
     if (!ib_uses_virt_dma(dev))
         dma_unmap_page(dev->dma_device, addr, size, direction);
 }
 
 int ib_dma_virt_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents);
 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
                       struct scatterlist *sg, int nents,
                       enum dma_data_direction direction,
                       unsigned long dma_attrs)
 {
     if (ib_uses_virt_dma(dev))
         return ib_dma_virt_map_sg(dev, sg, nents);
     return dma_map_sg_attrs(dev->dma_device, sg, nents, direction,
                 dma_attrs);
 }
 
 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
                      struct scatterlist *sg, int nents,
                      enum dma_data_direction direction,
                      unsigned long dma_attrs)
 {
     if (!ib_uses_virt_dma(dev))
         dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction,
                    dma_attrs);
 }
 
 /**
  * ib_dma_map_sgtable_attrs - Map a scatter/gather table to DMA addresses
  * @dev: The device for which the DMA addresses are to be created
  * @sg: The sg_table object describing the buffer
  * @direction: The direction of the DMA
  * @attrs: Optional DMA attributes for the map operation
  */
 static inline int ib_dma_map_sgtable_attrs(struct ib_device *dev,
                        struct sg_table *sgt,
                        enum dma_data_direction direction,
                        unsigned long dma_attrs)
 {
     int nents;
 
     if (ib_uses_virt_dma(dev)) {
         nents = ib_dma_virt_map_sg(dev, sgt->sgl, sgt->orig_nents);
         if (!nents)
             return -EIO;
         sgt->nents = nents;
         return 0;
     }
     return dma_map_sgtable(dev->dma_device, sgt, direction, dma_attrs);
 }
 
 static inline void ib_dma_unmap_sgtable_attrs(struct ib_device *dev,
                           struct sg_table *sgt,
                           enum dma_data_direction direction,
                           unsigned long dma_attrs)
 {
     if (!ib_uses_virt_dma(dev))
         dma_unmap_sgtable(dev->dma_device, sgt, direction, dma_attrs);
 }
 
 /**
  * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
  * @dev: The device for which the DMA addresses are to be created
  * @sg: The array of scatter/gather entries
  * @nents: The number of scatter/gather entries
  * @direction: The direction of the DMA
  */
 static inline int ib_dma_map_sg(struct ib_device *dev,
                 struct scatterlist *sg, int nents,
                 enum dma_data_direction direction)
 {
     return ib_dma_map_sg_attrs(dev, sg, nents, direction, 0);
 }
 
 /**
  * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
  * @dev: The device for which the DMA addresses were created
  * @sg: The array of scatter/gather entries
  * @nents: The number of scatter/gather entries
  * @direction: The direction of the DMA
  */
 static inline void ib_dma_unmap_sg(struct ib_device *dev,
                    struct scatterlist *sg, int nents,
                    enum dma_data_direction direction)
 {
     ib_dma_unmap_sg_attrs(dev, sg, nents, direction, 0);
 }
 
 /**
  * ib_dma_max_seg_size - Return the size limit of a single DMA transfer
  * @dev: The device to query
  *
  * The returned value represents a size in bytes.
  */
 static inline unsigned int ib_dma_max_seg_size(struct ib_device *dev)
 {
     if (ib_uses_virt_dma(dev))
         return UINT_MAX;
     return dma_get_max_seg_size(dev->dma_device);
 }
 
 /**
  * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
  * @dev: The device for which the DMA address was created
  * @addr: The DMA address
  * @size: The size of the region in bytes
  * @dir: The direction of the DMA
  */
 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
                           u64 addr,
                           size_t size,
                           enum dma_data_direction dir)
 {
     if (!ib_uses_virt_dma(dev))
         dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
 }
 
 /**
  * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
  * @dev: The device for which the DMA address was created
  * @addr: The DMA address
  * @size: The size of the region in bytes
  * @dir: The direction of the DMA
  */
 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
                          u64 addr,
                          size_t size,
                          enum dma_data_direction dir)
 {
     if (!ib_uses_virt_dma(dev))
         dma_sync_single_for_device(dev->dma_device, addr, size, dir);
 }
 
 /* ib_reg_user_mr - register a memory region for virtual addresses from kernel
  * space. This function should be called when 'current' is the owning MM.
  */
 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
                  u64 virt_addr, int mr_access_flags);
 
 /* ib_advise_mr -  give an advice about an address range in a memory region */
 int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
          u32 flags, struct ib_sge *sg_list, u32 num_sge);
 /**
  * ib_dereg_mr_user - Deregisters a memory region and removes it from the
  *   HCA translation table.
  * @mr: The memory region to deregister.
  * @udata: Valid user data or NULL for kernel object
  *
  * This function can fail, if the memory region has memory windows bound to it.
  */
 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata);
 
 /**
  * ib_dereg_mr - Deregisters a kernel memory region and removes it from the
  *   HCA translation table.
  * @mr: The memory region to deregister.
  *
  * This function can fail, if the memory region has memory windows bound to it.
  *
  * NOTE: for user mr use ib_dereg_mr_user with valid udata!
  */
 static inline int ib_dereg_mr(struct ib_mr *mr)
 {
     return ib_dereg_mr_user(mr, NULL);
 }
 
 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
               u32 max_num_sg);
 
 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
                     u32 max_num_data_sg,
                     u32 max_num_meta_sg);
 
 /**
  * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
  *   R_Key and L_Key.
  * @mr - struct ib_mr pointer to be updated.
  * @newkey - new key to be used.
  */
 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
 {
     mr->lkey = (mr->lkey & 0xffffff00) | newkey;
     mr->rkey = (mr->rkey & 0xffffff00) | newkey;
 }
 
 /**
  * ib_inc_rkey - increments the key portion of the given rkey. Can be used
  * for calculating a new rkey for type 2 memory windows.
  * @rkey - the rkey to increment.
  */
 static inline u32 ib_inc_rkey(u32 rkey)
 {
     const u32 mask = 0x000000ff;
     return ((rkey + 1) & mask) | (rkey & ~mask);
 }
 
 /**
  * ib_attach_mcast - Attaches the specified QP to a multicast group.
  * @qp: QP to attach to the multicast group.  The QP must be type
  *   IB_QPT_UD.
  * @gid: Multicast group GID.
  * @lid: Multicast group LID in host byte order.
  *
  * In order to send and receive multicast packets, subnet
  * administration must have created the multicast group and configured
  * the fabric appropriately.  The port associated with the specified
  * QP must also be a member of the multicast group.
  */
 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
 
 /**
  * ib_detach_mcast - Detaches the specified QP from a multicast group.
  * @qp: QP to detach from the multicast group.
  * @gid: Multicast group GID.
  * @lid: Multicast group LID in host byte order.
  */
 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
 
 struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,
                    struct inode *inode, struct ib_udata *udata);
 int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata);
 
 static inline int ib_check_mr_access(struct ib_device *ib_dev,
                      unsigned int flags)
 {
     /*
      * Local write permission is required if remote write or
      * remote atomic permission is also requested.
      */
     if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
         !(flags & IB_ACCESS_LOCAL_WRITE))
         return -EINVAL;
 
     if (flags & ~IB_ACCESS_SUPPORTED)
         return -EINVAL;
 
     if (flags & IB_ACCESS_ON_DEMAND &&
         !(ib_dev->attrs.kernel_cap_flags & IBK_ON_DEMAND_PAGING))
         return -EINVAL;
     return 0;
 }
 
 static inline bool ib_access_writable(int access_flags)
 {
     /*
      * We have writable memory backing the MR if any of the following
      * access flags are set.  "Local write" and "remote write" obviously
      * require write access.  "Remote atomic" can do things like fetch and
      * add, which will modify memory, and "MW bind" can change permissions
      * by binding a window.
      */
     return access_flags &
         (IB_ACCESS_LOCAL_WRITE   | IB_ACCESS_REMOTE_WRITE |
          IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND);
 }
 
 /**
  * ib_check_mr_status: lightweight check of MR status.
  *     This routine may provide status checks on a selected
  *     ib_mr. first use is for signature status check.
  *
  * @mr: A memory region.
  * @check_mask: Bitmask of which checks to perform from
  *     ib_mr_status_check enumeration.
  * @mr_status: The container of relevant status checks.
  *     failed checks will be indicated in the status bitmask
  *     and the relevant info shall be in the error item.
  */
 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
                struct ib_mr_status *mr_status);
 
 /**
  * ib_device_try_get: Hold a registration lock
  * device: The device to lock
  *
  * A device under an active registration lock cannot become unregistered. It
  * is only possible to obtain a registration lock on a device that is fully
  * registered, otherwise this function returns false.
  *
  * The registration lock is only necessary for actions which require the
  * device to still be registered. Uses that only require the device pointer to
  * be valid should use get_device(&ibdev->dev) to hold the memory.
  *
  */
 static inline bool ib_device_try_get(struct ib_device *dev)
 {
     return refcount_inc_not_zero(&dev->refcount);
 }
 
 void ib_device_put(struct ib_device *device);
 struct ib_device *ib_device_get_by_netdev(struct net_device *ndev,
                       enum rdma_driver_id driver_id);
 struct ib_device *ib_device_get_by_name(const char *name,
                     enum rdma_driver_id driver_id);
 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u32 port,
                         u16 pkey, const union ib_gid *gid,
                         const struct sockaddr *addr);
 int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
              unsigned int port);
 struct net_device *ib_device_netdev(struct ib_device *dev, u32 port);
 
 struct ib_wq *ib_create_wq(struct ib_pd *pd,
                struct ib_wq_init_attr *init_attr);
 int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata);
 
 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
          unsigned int *sg_offset, unsigned int page_size);
 int ib_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, unsigned int page_size);
 
 static inline int
 ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
           unsigned int *sg_offset, unsigned int page_size)
 {
     int n;
 
     n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, page_size);
     mr->iova = 0;
 
     return n;
 }
 
 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
         unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64));
 
 void ib_drain_rq(struct ib_qp *qp);
 void ib_drain_sq(struct ib_qp *qp);
 void ib_drain_qp(struct ib_qp *qp);
 
 int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed,
              u8 *width);
 
 static inline u8 *rdma_ah_retrieve_dmac(struct rdma_ah_attr *attr)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_ROCE)
         return attr->roce.dmac;
     return NULL;
 }
 
 static inline void rdma_ah_set_dlid(struct rdma_ah_attr *attr, u32 dlid)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_IB)
         attr->ib.dlid = (u16)dlid;
     else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         attr->opa.dlid = dlid;
 }
 
 static inline u32 rdma_ah_get_dlid(const struct rdma_ah_attr *attr)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_IB)
         return attr->ib.dlid;
     else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         return attr->opa.dlid;
     return 0;
 }
 
 static inline void rdma_ah_set_sl(struct rdma_ah_attr *attr, u8 sl)
 {
     attr->sl = sl;
 }
 
 static inline u8 rdma_ah_get_sl(const struct rdma_ah_attr *attr)
 {
     return attr->sl;
 }
 
 static inline void rdma_ah_set_path_bits(struct rdma_ah_attr *attr,
                      u8 src_path_bits)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_IB)
         attr->ib.src_path_bits = src_path_bits;
     else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         attr->opa.src_path_bits = src_path_bits;
 }
 
 static inline u8 rdma_ah_get_path_bits(const struct rdma_ah_attr *attr)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_IB)
         return attr->ib.src_path_bits;
     else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         return attr->opa.src_path_bits;
     return 0;
 }
 
 static inline void rdma_ah_set_make_grd(struct rdma_ah_attr *attr,
                     bool make_grd)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         attr->opa.make_grd = make_grd;
 }
 
 static inline bool rdma_ah_get_make_grd(const struct rdma_ah_attr *attr)
 {
     if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
         return attr->opa.make_grd;
     return false;
 }
 
 static inline void rdma_ah_set_port_num(struct rdma_ah_attr *attr, u32 port_num)
 {
     attr->port_num = port_num;
 }
 
 static inline u32 rdma_ah_get_port_num(const struct rdma_ah_attr *attr)
 {
     return attr->port_num;
 }
 
 static inline void rdma_ah_set_static_rate(struct rdma_ah_attr *attr,
                        u8 static_rate)
 {
     attr->static_rate = static_rate;
 }
 
 static inline u8 rdma_ah_get_static_rate(const struct rdma_ah_attr *attr)
 {
     return attr->static_rate;
 }
 
 static inline void rdma_ah_set_ah_flags(struct rdma_ah_attr *attr,
                     enum ib_ah_flags flag)
 {
     attr->ah_flags = flag;
 }
 
 static inline enum ib_ah_flags
         rdma_ah_get_ah_flags(const struct rdma_ah_attr *attr)
 {
     return attr->ah_flags;
 }
 
 static inline const struct ib_global_route
         *rdma_ah_read_grh(const struct rdma_ah_attr *attr)
 {
     return &attr->grh;
 }
 
 /*To retrieve and modify the grh */
 static inline struct ib_global_route
         *rdma_ah_retrieve_grh(struct rdma_ah_attr *attr)
 {
     return &attr->grh;
 }
 
 static inline void rdma_ah_set_dgid_raw(struct rdma_ah_attr *attr, void *dgid)
 {
     struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
 
     memcpy(grh->dgid.raw, dgid, sizeof(grh->dgid));
 }
 
 static inline void rdma_ah_set_subnet_prefix(struct rdma_ah_attr *attr,
                          __be64 prefix)
 {
     struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
 
     grh->dgid.global.subnet_prefix = prefix;
 }
 
 static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr,
                         __be64 if_id)
 {
     struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
 
     grh->dgid.global.interface_id = if_id;
 }
 
 static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr,
                    union ib_gid *dgid, u32 flow_label,
                    u8 sgid_index, u8 hop_limit,
                    u8 traffic_class)
 {
     struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
 
     attr->ah_flags = IB_AH_GRH;
     if (dgid)
         grh->dgid = *dgid;
     grh->flow_label = flow_label;
     grh->sgid_index = sgid_index;
     grh->hop_limit = hop_limit;
     grh->traffic_class = traffic_class;
     grh->sgid_attr = NULL;
 }
 
 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr);
 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
                  u32 flow_label, u8 hop_limit, u8 traffic_class,
                  const struct ib_gid_attr *sgid_attr);
 void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
                const struct rdma_ah_attr *src);
 void rdma_replace_ah_attr(struct rdma_ah_attr *old,
               const struct rdma_ah_attr *new);
 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src);
 
 /**
  * rdma_ah_find_type - Return address handle type.
  *
  * @dev: Device to be checked
  * @port_num: Port number
  */
 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev,
                                u32 port_num)
 {
     if (rdma_protocol_roce(dev, port_num))
         return RDMA_AH_ATTR_TYPE_ROCE;
     if (rdma_protocol_ib(dev, port_num)) {
         if (rdma_cap_opa_ah(dev, port_num))
             return RDMA_AH_ATTR_TYPE_OPA;
         return RDMA_AH_ATTR_TYPE_IB;
     }
 
     return RDMA_AH_ATTR_TYPE_UNDEFINED;
 }
 
 /**
  * ib_lid_cpu16 - Return lid in 16bit CPU encoding.
  *     In the current implementation the only way to
  *     get the 32bit lid is from other sources for OPA.
  *     For IB, lids will always be 16bits so cast the
  *     value accordingly.
  *
  * @lid: A 32bit LID
  */
 static inline u16 ib_lid_cpu16(u32 lid)
 {
     WARN_ON_ONCE(lid & 0xFFFF0000);
     return (u16)lid;
 }
 
 /**
  * ib_lid_be16 - Return lid in 16bit BE encoding.
  *
  * @lid: A 32bit LID
  */
 static inline __be16 ib_lid_be16(u32 lid)
 {
     WARN_ON_ONCE(lid & 0xFFFF0000);
     return cpu_to_be16((u16)lid);
 }
 
 /**
  * ib_get_vector_affinity - Get the affinity mappings of a given completion
  *   vector
  * @device:         the rdma device
  * @comp_vector:    index of completion vector
  *
  * Returns NULL on failure, otherwise a corresponding cpu map of the
  * completion vector (returns all-cpus map if the device driver doesn't
  * implement get_vector_affinity).
  */
 static inline const struct cpumask *
 ib_get_vector_affinity(struct ib_device *device, int comp_vector)
 {
     if (comp_vector < 0 || comp_vector >= device->num_comp_vectors ||
         !device->ops.get_vector_affinity)
         return NULL;
 
     return device->ops.get_vector_affinity(device, comp_vector);
 
 }
 
 /**
  * rdma_roce_rescan_device - Rescan all of the network devices in the system
  * and add their gids, as needed, to the relevant RoCE devices.
  *
  * @device:         the rdma device
  */
 void rdma_roce_rescan_device(struct ib_device *ibdev);
 
 struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile);
 
 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs);
 
 struct net_device *rdma_alloc_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_init_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 *),
              struct net_device *netdev);
 
 /**
  * rdma_device_to_ibdev - Get ib_device pointer from device pointer
  *
  * @device: device pointer for which ib_device pointer to retrieve
  *
  * rdma_device_to_ibdev() retrieves ib_device pointer from device.
  *
  */
 static inline struct ib_device *rdma_device_to_ibdev(struct device *device)
 {
     struct ib_core_device *coredev =
         container_of(device, struct ib_core_device, dev);
 
     return coredev->owner;
 }
 
 /**
  * ibdev_to_node - return the NUMA node for a given ib_device
  * @dev:    device to get the NUMA node for.
  */
 static inline int ibdev_to_node(struct ib_device *ibdev)
 {
     struct device *parent = ibdev->dev.parent;
 
     if (!parent)
         return NUMA_NO_NODE;
     return dev_to_node(parent);
 }
 
 /**
  * rdma_device_to_drv_device - Helper macro to reach back to driver's
  *                 ib_device holder structure from device pointer.
  *
  * NOTE: New drivers should not make use of this API; This API is only for
  * existing drivers who have exposed sysfs entries using
  * ops->device_group.
  */
 #define rdma_device_to_drv_device(dev, drv_dev_struct, ibdev_member)           \
     container_of(rdma_device_to_ibdev(dev), drv_dev_struct, ibdev_member)
 
 bool rdma_dev_access_netns(const struct ib_device *device,
                const struct net *net);
 
 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MIN (0xC000)
 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MAX (0xFFFF)
 #define IB_GRH_FLOWLABEL_MASK (0x000FFFFF)
 
 /**
  * rdma_flow_label_to_udp_sport - generate a RoCE v2 UDP src port value based
  *                               on the flow_label
  *
  * This function will convert the 20 bit flow_label input to a valid RoCE v2
  * UDP src port 14 bit value. All RoCE V2 drivers should use this same
  * convention.
  */
 static inline u16 rdma_flow_label_to_udp_sport(u32 fl)
 {
     u32 fl_low = fl & 0x03fff, fl_high = fl & 0xFC000;
 
     fl_low ^= fl_high >> 14;
     return (u16)(fl_low | IB_ROCE_UDP_ENCAP_VALID_PORT_MIN);
 }
 
 /**
  * rdma_calc_flow_label - generate a RDMA symmetric flow label value based on
  *                        local and remote qpn values
  *
  * This function folded the multiplication results of two qpns, 24 bit each,
  * fields, and converts it to a 20 bit results.
  *
  * This function will create symmetric flow_label value based on the local
  * and remote qpn values. this will allow both the requester and responder
  * to calculate the same flow_label for a given connection.
  *
  * This helper function should be used by driver in case the upper layer
  * provide a zero flow_label value. This is to improve entropy of RDMA
  * traffic in the network.
  */
 static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn)
 {
     u64 v = (u64)lqpn * rqpn;
 
     v ^= v >> 20;
     v ^= v >> 40;
 
     return (u32)(v & IB_GRH_FLOWLABEL_MASK);
 }
 
 /**
  * rdma_get_udp_sport - Calculate and set UDP source port based on the flow
  *                      label. If flow label is not defined in GRH then
  *                      calculate it based on lqpn/rqpn.
  *
  * @fl:                 flow label from GRH
  * @lqpn:               local qp number
  * @rqpn:               remote qp number
  */
 static inline u16 rdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn)
 {
     if (!fl)
         fl = rdma_calc_flow_label(lqpn, rqpn);
 
     return rdma_flow_label_to_udp_sport(fl);
 }
 
 const struct ib_port_immutable*
 ib_port_immutable_read(struct ib_device *dev, unsigned int port);
 #endif /* IB_VERBS_H */