SysTutorials Posts

NAME ibv_wr_abort, ibv_wr_complete, ibv_wr_start – Manage regions allowed to post work ibv_wr_atomic_cmp_swp, ibv_wr_atomic_fetch_add – Post remote atomic operation work requests ibv_wr_bind_mw, ibv_wr_local_inv – Post work requests for memory windows ibv_wr_rdma_read, ibv_wr_rdma_write, ibv_wr_rdma_write_imm – Post RDMA work requests ibv_wr_send, ibv_wr_send_imm, ibv_wr_send_inv – Post send work requests ibv_wr_send_tso – Post segmentation offload work requests ibv_wr_set_inline_data, ibv_wr_set_inline_data_list –…

NAME ibv_wr_abort, ibv_wr_complete, ibv_wr_start – Manage regions allowed to post work ibv_wr_atomic_cmp_swp, ibv_wr_atomic_fetch_add – Post remote atomic operation work requests ibv_wr_bind_mw, ibv_wr_local_inv – Post work requests for memory windows ibv_wr_rdma_read, ibv_wr_rdma_write, ibv_wr_rdma_write_imm – Post RDMA work requests ibv_wr_send, ibv_wr_send_imm, ibv_wr_send_inv – Post send work requests ibv_wr_send_tso – Post segmentation offload work requests ibv_wr_set_inline_data, ibv_wr_set_inline_data_list –…

NAME ibv_wr_abort, ibv_wr_complete, ibv_wr_start – Manage regions allowed to post work ibv_wr_atomic_cmp_swp, ibv_wr_atomic_fetch_add – Post remote atomic operation work requests ibv_wr_bind_mw, ibv_wr_local_inv – Post work requests for memory windows ibv_wr_rdma_read, ibv_wr_rdma_write, ibv_wr_rdma_write_imm – Post RDMA work requests ibv_wr_send, ibv_wr_send_imm, ibv_wr_send_inv – Post send work requests ibv_wr_send_tso – Post segmentation offload work requests ibv_wr_set_inline_data, ibv_wr_set_inline_data_list –…

NAME ibv_wr_abort, ibv_wr_complete, ibv_wr_start – Manage regions allowed to post work ibv_wr_atomic_cmp_swp, ibv_wr_atomic_fetch_add – Post remote atomic operation work requests ibv_wr_bind_mw, ibv_wr_local_inv – Post work requests for memory windows ibv_wr_rdma_read, ibv_wr_rdma_write, ibv_wr_rdma_write_imm – Post RDMA work requests ibv_wr_send, ibv_wr_send_imm, ibv_wr_send_inv – Post send work requests ibv_wr_send_tso – Post segmentation offload work requests ibv_wr_set_inline_data, ibv_wr_set_inline_data_list –…

NAME ibv_wr_abort, ibv_wr_complete, ibv_wr_start – Manage regions allowed to post work ibv_wr_atomic_cmp_swp, ibv_wr_atomic_fetch_add – Post remote atomic operation work requests ibv_wr_bind_mw, ibv_wr_local_inv – Post work requests for memory windows ibv_wr_rdma_read, ibv_wr_rdma_write, ibv_wr_rdma_write_imm – Post RDMA work requests ibv_wr_send, ibv_wr_send_imm, ibv_wr_send_inv – Post send work requests ibv_wr_send_tso – Post segmentation offload work requests ibv_wr_set_inline_data, ibv_wr_set_inline_data_list –…

NAME ibv_resize_cq – resize a completion queue (CQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_resize_cq(struct ibv_cq *cq, int cqe); DESCRIPTION ibv_resize_cq() resizes the completion queue (CQ) cq to have at least cqe entries. cqe must be at least the number of unpolled entries in the CQ cq. If cqe is a valid value less than the current…

NAME ibv_rereg_mr – re-register a memory region (MR) SYNOPSIS #include <infiniband/verbs.h> int ibv_rereg_mr(struct ibv_mr *mr, int flags, struct ibv_pd *pd, void *addr, size_t length, int access); DESCRIPTION ibv_rereg_mr() Modifies the attributes of an existing memory region (MR) mr. Conceptually, this call performs the functions deregister memory region followed by register memory region. Where possible, resources…

NAME ibv_req_notify_cq – request completion notification on a completion queue (CQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_req_notify_cq(struct ibv_cq *cq, int solicited_only); DESCRIPTION ibv_req_notify_cq() requests a completion notification on the completion queue (CQ) cq. Upon the addition of a new CQ entry (CQE) to cq, a completion event will be added to the completion channel associated with…

NAME ibv_reg_mr, ibv_reg_mr_iova, ibv_dereg_mr – register or deregister a memory region (MR) SYNOPSIS #include <infiniband/verbs.h> struct ibv_mr *ibv_reg_mr(struct ibv_pd *pd, void *addr, size_t length, int access); struct ibv_mr *ibv_reg_mr_iova(struct ibv_pd *pd, void *addr, size_t length, uint64_t hca_va, int access); int ibv_dereg_mr(struct ibv_mr *mr); DESCRIPTION ibv_reg_mr() registers a memory region (MR) associated with the protection domain…

NAME ibv_alloc_dm, ibv_free_dm, ibv_memcpy_to/from_dm – allocate or free a device memory buffer (DMs) and perform memory copy to or from it SYNOPSIS #include <infiniband/verbs.h> struct ibv_dm *ibv_alloc_dm(struct ibv_context *context, struct ibv_alloc_dm_attr *attr); int ibv_free_dm(struct ibv_dm *dm); DESCRIPTION ibv_alloc_dm() allocates a device memory buffer for the RDMA device context context. The argument attr is a pointer…

NAME ibv_read_counters – Read counter values SYNOPSIS #include <infiniband/verbs.h> int ibv_read_counters(struct ibv_counters *counters, uint64_t *counters_value, uint32_t ncounters, uint32_t flags); DESCRIPTION ibv_read_counters() returns the values of the chosen counters into counters_value array of which can accumulate ncounters. The values are filled according to the configuration defined by the user in the ibv_attach_counters_point_xxx functions. ARGUMENTS counters Counters…

NAME ibv_rate_to_mult – convert IB rate enumeration to multiplier of 2.5 Gbit/sec mult_to_ibv_rate – convert multiplier of 2.5 Gbit/sec to an IB rate enumeration SYNOPSIS #include <infiniband/verbs.h> int ibv_rate_to_mult(enum ibv_rate rate); enum ibv_rate mult_to_ibv_rate(int mult); DESCRIPTION ibv_rate_to_mult() converts the IB transmission rate enumeration rate to a multiple of 2.5 Gbit/sec (the base rate). For example,…

NAME ibv_rate_to_mbps – convert IB rate enumeration to Mbit/sec mbps_to_ibv_rate – convert Mbit/sec to an IB rate enumeration SYNOPSIS #include <infiniband/verbs.h> int ibv_rate_to_mbps(enum ibv_rate rate); enum ibv_rate mbps_to_ibv_rate(int mbps); DESCRIPTION ibv_rate_to_mbps() converts the IB transmission rate enumeration rate to a number of Mbit/sec. For example, if rate is IBV_RATE_5_GBPS, the value 5000 will be returned…

NAME ibv_query_srq – get the attributes of a shared receive queue (SRQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_query_srq(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr); DESCRIPTION ibv_query_srq() gets the attributes of the SRQ srq and returns them through the pointer srq_attr. The argument srq_attr is an ibv_srq_attr struct, as defined in <infiniband/verbs.h>. struct ibv_srq_attr { uint32_t max_wr; /*…

NAME ibv_query_rt_values_ex – query an RDMA device for some real time values SYNOPSIS #include <infiniband/verbs.h> int ibv_query_rt_values_ex(struct ibv_context *context, struct ibv_values_ex *values); DESCRIPTION ibv_query_rt_values_ex() returns certain real time values of a device context. The argument attr is a pointer to an ibv_device_attr_ex struct, as defined in <infiniband/verbs.h>. struct ibv_values_ex { uint32_t comp_mask; /* Compatibility mask…

NAME ibv_query_qp – get the attributes of a queue pair (QP) SYNOPSIS #include <infiniband/verbs.h> int ibv_query_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask, struct ibv_qp_init_attr *init_attr); DESCRIPTION ibv_query_qp() gets the attributes specified in attr_mask for the QP qp and returns them through the pointers attr and init_attr. The argument attr is an ibv_qp_attr struct, as…

NAME ibv_query_port – query an RDMA port’s attributes SYNOPSIS #include <infiniband/verbs.h> int ibv_query_port(struct ibv_context *context, uint8_t port_num, struct ibv_port_attr *port_attr); DESCRIPTION ibv_query_port() returns the attributes of port port_num for device context context through the pointer port_attr. The argument port_attr is an ibv_port_attr struct, as defined in <infiniband/verbs.h>. struct ibv_port_attr { enum ibv_port_state state; /* Logical…

NAME ibv_query_pkey – query an InfiniBand port’s P_Key table SYNOPSIS #include <infiniband/verbs.h> int ibv_query_pkey(struct ibv_context *context, uint8_t port_num, int index, uint16_t *pkey); DESCRIPTION ibv_query_pkey() returns the P_Key value (in network byte order) in entry index of port port_num for device context context through the pointer pkey. RETURN VALUE ibv_query_pkey() returns 0 on success, and -1…

NAME ibv_query_gid – query an InfiniBand port’s GID table SYNOPSIS #include <infiniband/verbs.h> int ibv_query_gid(struct ibv_context *context, uint8_t port_num, int index, union ibv_gid *gid); DESCRIPTION ibv_query_gid() returns the GID value in entry index of port port_num for device context context through the pointer gid. RETURN VALUE ibv_query_gid() returns 0 on success, and -1 on error. SEE…

NAME ibv_query_device_ex – query an RDMA device’s attributes SYNOPSIS #include <infiniband/verbs.h> int ibv_query_device_ex(struct ibv_context *context, struct ibv_device_attr_ex *attr); DESCRIPTION ibv_query_device_ex() returns the attributes of the device with context context. The argument attr is a pointer to an ibv_device_attr_ex struct, as defined in <infiniband/verbs.h>. struct ibv_device_attr_ex { struct ibv_device_attr orig_attr; uint32_t comp_mask; /* Compatibility mask that…