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IBV_CREATE_QP_EX(3) Libibverbs Programmer's Manual IBV_CREATE_QP_EX(3) NAME ibv_create_qp_ex, ibv_destroy_qp - create or destroy a queue pair (QP) SYNOPSIS #include <infiniband/verbs.h> struct ibv_qp *ibv_create_qp_ex(struct ibv_context *context, struct ibv_qp_init_attr_ex *qp_init_attr); int ibv_destroy_qp(struct ibv_qp *qp); DESCRIPTION ibv_create_qp_ex() creates a queue pair (QP) associated with the protection domain pd. The argument qp_init_attr_ex is an ibv_qp_init_attr_ex struct, as defined in <infiniband/verbs.h>. struct ibv_qp_init_attr_ex { void *qp_context; /* Associated context of the QP */ struct ibv_cq *send_cq; /* CQ to be associated with the Send Queue (SQ) */ struct ibv_cq *recv_cq; /* CQ to be associated with the Receive Queue (RQ) */ struct ibv_srq *srq; /* SRQ handle if QP is to be associated with an SRQ, otherwise NULL */ struct ibv_qp_cap cap; /* QP capabilities */ enum ibv_qp_type qp_type; /* QP Transport Service Type: IBV_QPT_RC, IBV_QPT_UC, IBV_QPT_UD or IBV_QPT_RAW_PACKET */ int sq_sig_all; /* If set, each Work Request (WR) submitted to the SQ generates a completion entry */ uint32_t comp_mask; /* Identifies valid fields */ struct ibv_pd *pd; /* PD to be associated with the QP */ struct ibv_xrcd *xrcd; /* XRC domain to be associated with the target QP */ enum ibv_qp_create_flags create_flags; /* Creation flags for this QP */ uint16_t max_tso_header; /* Maximum TSO header size */ struct ibv_rwq_ind_table *rwq_ind_tbl; /* Indirection table to be associated with the QP */ struct ibv_rx_hash_conf rx_hash_conf; /* RX hash configuration to be used */ }; struct ibv_qp_cap { uint32_t max_send_wr; /* Requested max number of outstanding WRs in the SQ */ uint32_t max_recv_wr; /* Requested max number of outstanding WRs in the RQ */ uint32_t max_send_sge; /* Requested max number of scatter/gather (s/g) elements in a WR in the SQ */ uint32_t max_recv_sge; /* Requested max number of s/g elements in a WR in the SQ */ uint32_t max_inline_data;/* Requested max number of data (bytes) that can be posted inline to the SQ, otherwise 0 */ }; enum ibv_qp_create_flags { IBV_QP_CREATE_BLOCK_SELF_MCAST_LB = 1 << 1, /* Prevent self multicast loopback */ IBV_QP_CREATE_SCATTER_FCS = 1 << 8, /* FCS field will be scattered to host memory */ IBV_QP_CREATE_CVLAN_STRIPPING = 1 << 9, /* CVLAN field will be stripped from incoming packets */ }; struct ibv_rx_hash_conf { uint8_t rx_hash_function; /* RX hash function, use enum ibv_rx_hash_function_flags */ uint8_t rx_hash_key_len; /* RX hash key length */ uint8_t *rx_hash_key; /* RX hash key data */ uint64_t rx_hash_fields_mask; /* RX fields that should participate in the hashing, use enum ibv_rx_hash_fields */ }; The function ibv_create_qp_ex() will update the qp_init_attr_ex->cap struct with the actual QP values of the QP that was created; the values will be greater than or equal to the values requested. ibv_destroy_qp() destroys the QP qp. NOTES The attributes max_recv_wr and max_recv_sge are ignored by ibv_create_qp_ex() if the QP is to be associated with an SRQ. ibv_destroy_qp() fails if the QP is attached to a multicast group. SEE ALSO ibv_alloc_pd(3), ibv_modify_qp(3), ibv_query_qp(3), ibv_create_rwq_ind_table(3) AUTHORS Yishai Hadas <yishaih@mellanox.com> libibverbs 2013-06-26 IBV_CREATE_QP_EX(3)