SysTutorials Posts

ibv_query_device – query an RDMA device’s attributes Synopsis#include <infiniband/verbs.h> int ibv_query_device(struct ibv_context *context, struct ibv_device_attr *device_attr);Descriptionibv_query_device() returns the attributes of the device with context context. The argument device_attr is a pointer to an ibv_device_attr struct, as defined in <infiniband/verbs.h>. struct ibv_device_attr { char fw_ver[64]; /* FW version */ uint64_t node_guid; /* Node GUID (in network…

NAME ibv_query_device – query an RDMA device’s attributes SYNOPSIS #include <infiniband/verbs.h> int ibv_query_device(struct ibv_context *context, struct ibv_device_attr *device_attr); DESCRIPTION ibv_query_device() returns the attributes of the device with context context. The argument device_attr is a pointer to an ibv_device_attr struct, as defined in <infiniband/verbs.h>. struct ibv_device_attr { char fw_ver[64]; /* FW version */ uint64_t node_guid; /*…

ibv_post_srq_ops – perform on a special shared receive queue (SRQ) configuration manipulations Synopsis#include <infiniband/verbs.h> int ibv_post_srq_ops(struct ibv_srq *srq, struct ibv_ops_wr *wr, struct ibv_ops_wr **bad_wr);DescriptionThe ibv_post_srq_ops() performs series of offload configuration manipulations on special types of SRQ srq. Currenlty it is used to configure tag matching SRQ. Series of configuration operations defined by linked lists of…

ibv_post_srq_ops – perform on a special shared receive queue (SRQ) configuration manipulations Synopsis#include <infiniband/verbs.h> int ibv_post_srq_ops(struct ibv_srq *srq, struct ibv_ops_wr *wr, struct ibv_ops_wr **bad_wr);DescriptionThe ibv_post_srq_ops() performs series of offload configuration manipulations on special types of SRQ srq. Currenlty it is used to configure tag matching SRQ. Series of configuration operations defined by linked lists of…

NAME ibv_post_srq_ops – perform on a special shared receive queue (SRQ) configuration manipulations SYNOPSIS #include <infiniband/verbs.h> int ibv_post_srq_ops(struct ibv_srq *srq, struct ibv_ops_wr *wr, struct ibv_ops_wr **bad_wr); DESCRIPTION The ibv_post_srq_ops() performs series of offload configuration manipulations on special types of SRQ srq. Currenlty it is used to configure tag matching SRQ. Series of configuration operations defined…

NAME ibv_post_send – post a list of work requests (WRs) to a send queue SYNOPSIS #include <infiniband/verbs.h> int ibv_post_send(struct ibv_qp *qp, struct ibv_send_wr *wr, struct ibv_send_wr **bad_wr); DESCRIPTION ibv_post_send() posts the linked list of work requests (WRs) starting with wr to the send queue of the queue pair qp. It stops processing WRs from this…

NAME ibv_post_recv – post a list of work requests (WRs) to a receive queue SYNOPSIS #include <infiniband/verbs.h> int ibv_post_recv(struct ibv_qp *qp, struct ibv_recv_wr *wr, struct ibv_recv_wr **bad_wr); DESCRIPTION ibv_post_recv() posts the linked list of work requests (WRs) starting with wr to the receive queue of the queue pair qp. It stops processing WRs from this…

NAME ibv_event_type_str – Return string describing event_type enum value ibv_node_type_str – Return string describing node_type enum value ibv_port_state_str – Return string describing port_state enum value SYNOPSIS #include <infiniband/verbs.h> const char *ibv_event_type_str(enum ibv_event_type event_type); const char *ibv_node_type_str(enum ibv_node_type node_type); const char *ibv_port_state_str(enum ibv_port_state port_state); DESCRIPTION ibv_node_type_str() returns a string describing the node type enum value node_type….

NAME ibv_poll_cq – poll a completion queue (CQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_poll_cq(struct ibv_cq *cq, int num_entries, struct ibv_wc *wc); DESCRIPTION ibv_poll_cq() polls the CQ cq for work completions and returns the first num_entries (or all available completions if the CQ contains fewer than this number) in the array wc. The argument wc is a…

NAME ibv_open_xrcd, ibv_close_xrcd – open or close an XRC protection domain (XRCDs) SYNOPSIS #include <infiniband/verbs.h> struct ibv_xrcd *ibv_open_xrcd(struct ibv_context *context, struct ibv_xrcd_init_attr *xrcd_init_attr); int ibv_close_xrcd(struct ibv_xrcd *xrcd); DESCRIPTION ibv_open_xrcd() open an XRC domain for the RDMA device context context xrcd_init_attr is an ibv_xrcd_init_attr struct, as defined in <infiniband/verbs.h>. struct ibv_xrcd_init_attr { uint32_t comp_mask; /* Identifies…

NAME ibv_open_qp – open a shareable queue pair (QP) SYNOPSIS #include <infiniband/verbs.h> struct ibv_qp *ibv_open_qp(struct ibv_context *context, struct ibv_qp_open_attr *qp_open_attr); DESCRIPTION ibv_open_qp() opens an existing queue pair (QP) associated with the extended protection domain xrcd. The argument qp_open_attr is an ibv_qp_open_attr struct, as defined in <infiniband/verbs.h>. struct ibv_qp_open_attr { uint32_t comp_mask; /* Identifies valid fields…

NAME ibv_open_device, ibv_close_device – open and close an RDMA device context SYNOPSIS #include <infiniband/verbs.h> struct ibv_context *ibv_open_device(struct ibv_device *device); int ibv_close_device(struct ibv_context *context); DESCRIPTION ibv_open_device() opens the device device and creates a context for further use. ibv_close_device() closes the device context context. RETURN VALUE ibv_open_device() returns a pointer to the allocated device context, or NULL…

NAME ibv_event_type_str – Return string describing event_type enum value ibv_node_type_str – Return string describing node_type enum value ibv_port_state_str – Return string describing port_state enum value SYNOPSIS #include <infiniband/verbs.h> const char *ibv_event_type_str(enum ibv_event_type event_type); const char *ibv_node_type_str(enum ibv_node_type node_type); const char *ibv_port_state_str(enum ibv_port_state port_state); DESCRIPTION ibv_node_type_str() returns a string describing the node type enum value node_type….

NAME ibv_modify_wq – Modify a Work Queue (WQ). SYNOPSIS #include <infiniband/verbs.h> struct int ibv_modify_wq(struct ibv_wq *wq, struct ibv_wq_attr *wq_attr); DESCRIPTION ibv_modify_wq() modifys a WQ wq. The argument wq_attr is an ibv_wq_attr struct, as defined in <infiniband/verbs.h>. struct ibv_wq_attr { uint32_t attr_mask; /* Use enum ibv_wq_attr_mask */ enum ibv_wq_state wq_state; /* Move to this state */…

NAME ibv_modify_srq – modify attributes of a shared receive queue (SRQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_modify_srq(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr, int srq_attr_mask); DESCRIPTION ibv_modify_srq() modifies the attributes of SRQ srq with the attributes in srq_attr according to the mask srq_attr_mask. The argument srq_attr is an ibv_srq_attr struct, as defined in <infiniband/verbs.h>. struct ibv_srq_attr {…

NAME ibv_modify_qp_rate_limit – modify the send rate limits attributes of a queue pair (QP) SYNOPSIS #include <infiniband/verbs.h> int ibv_modify_qp_rate_limit(struct ibv_qp *qp, struct ibv_qp_rate_limit_attr *attr); DESCRIPTION ibv_modify_qp_rate_limit() modifies the send rate limiting packet pacing attributes of QP qp with the attributes in attr. The argument attr is an ibv_qp_rate_limit_attr struct, as defined in <infiniband/verbs.h>. The rate_limit…

NAME ibv_modify_qp – modify the attributes of a queue pair (QP) SYNOPSIS #include <infiniband/verbs.h> int ibv_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, int attr_mask); DESCRIPTION ibv_modify_qp() modifies the attributes of QP qp with the attributes in attr according to the mask attr_mask. The argument attr is an ibv_qp_attr struct, as defined in <infiniband/verbs.h>. struct ibv_qp_attr {…

NAME ibv_flow_action_esp – Flow action esp for verbs SYNOPSIS #include <infiniband/verbs.h> struct ibv_flow_action * ibv_create_flow_action_esp(struct ibv_context *ctx, struct ibv_flow_action_esp *esp); int ibv_modify_flow_action_esp(struct ibv_flow_action *action, struct ibv_flow_action_esp *esp); int ibv_destroy_flow_action(struct ibv_flow_action *action); DESCRIPTION An IPSEC ESP flow steering action allows a flow steering rule to decrypt or encrypt a packet after matching. Each action contains the…

NAME ibv_modify_cq – modify a completion queue (CQ) SYNOPSIS #include <infiniband/verbs.h> int ibv_modify_cq(struct ibv_cq *cq, struct ibv_modify_cq_attr *cq_attr); DESCRIPTION ibv_modify_cq() modify a CQ cq. The argument cq_attr is an ibv_modify_cq_attr struct, as defined in <infiniband/verbs.h>. struct ibv_moderate_cq { uint16_t cq_count; /* number of completions per event */ uint16_t cq_period; /* in micro seconds */ };…

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…