libibverbs/man/ibv_query_device_ex.3

struct ibv_device_attr_ex {
struct ibv_device_attr orig_attr;
uint32_t comp_mask; /* Compatibility mask that defines which of the following variables are valid */
struct ibv_odp_caps odp_caps; /* On-Demand Paging capabilities */
uint64_t completion_timestamp_mask; /* Completion timestamp mask (0 = unsupported) */
uint64_t hca_core_clock; /* The frequency (in kHZ) of the HCA (0 = unsupported) */
uint64_t device_cap_flags_ex; /* Extended device capability flags */
struct ibv_tso_caps tso_caps; /* TCP segmentation offload capabilities */
struct ibv_rss_caps rss_caps; /* RSS capabilities */
uint32_t max_wq_type_rq; /* Max Work Queue from type RQ */
struct ibv_packet_pacing_caps packet_pacing_caps; /* Packet pacing capabilities */
uint32_t raw_packet_caps; /* Raw packet capabilities, use enum ibv_raw_packet_caps */
};

struct ibv_odp_caps {
 uint64_t general_odp_caps; /* Mask with enum ibv_odp_general_cap_bits */
 struct {
 uint32_t rc_odp_caps; /* Mask with enum ibv_odp_tranport_cap_bits to know which operations are supported. */
 uint32_t uc_odp_caps; /* Mask with enum ibv_odp_tranport_cap_bits to know which operations are supported. */
 uint32_t ud_odp_caps; /* Mask with enum ibv_odp_tranport_cap_bits to know which operations are supported. */
 } per_transport_caps;
};

enum ibv_odp_general_cap_bits {
 IBV_ODP_SUPPORT = 1 << 0, /* On demand paging is supported */
};

enum ibv_odp_transport_cap_bits {
 IBV_ODP_SUPPORT_SEND = 1 << 0, /* Send operations support on-demand paging */
 IBV_ODP_SUPPORT_RECV = 1 << 1, /* Receive operations support on-demand paging */
 IBV_ODP_SUPPORT_WRITE = 1 << 2, /* RDMA-Write operations support on-demand paging */
 IBV_ODP_SUPPORT_READ = 1 << 3, /* RDMA-Read operations support on-demand paging */
 IBV_ODP_SUPPORT_ATOMIC = 1 << 4, /* RDMA-Atomic operations support on-demand paging */
};

struct ibv_tso_caps {
 uint32_t max_tso; /* Maximum payload size in bytes supported for segmentation by TSO engine.*/
 uint32_t supported_qpts; /* Bitmap showing which QP types are supported by TSO operation. */
};

struct ibv_rss_caps {
 uint32_t supported_qpts; /* Bitmap showing which QP types are supported RSS */
 uint32_t max_rwq_indirection_tables; /* Max receive work queue indirection tables */
 uint32_t max_rwq_indirection_table_size; /* Max receive work queue indirection table size */
 uint64_t rx_hash_fields_mask; /* Mask with enum ibv_rx_hash_fields to know which incoming packet's field can participates in the RX hash */
 uint8_t rx_hash_function; /* Mask with enum ibv_rx_hash_function_flags to know which hash functions are supported */
};

struct ibv_packet_pacing_caps {
 uint32_t qp_rate_limit_min; /* Minimum rate limit in kbps */
 uint32_t qp_rate_limit_max; /* Maximum rate limit in kbps */
 uint32_t supported_qpts; /* Bitmap showing which QP types are supported. */
};

enum ibv_raw_packet_caps {
IBV_RAW_PACKET_CAP_CVLAN_STRIPPING = 1 << 0, /* CVLAN stripping is supported */
IBV_RAW_PACKET_CAP_SCATTER_FCS = 1 << 1, /* FCS scattering is supported */
IBV_RAW_PACKET_CAP_IP_CSUM = 1 << 2, /* IP CSUM offload is supported */
};