Attribute values are valid if they have been set using ibv_modify_qp (). The exact list of valid attributes depends on the QP state. Multiple calls to ibv_query_qp () may yield some differences in the values returned for the following attributes: qp_state, path_mig_state, sq_draining, ah_attr (if APM is enabled).
1/19/2013 · IBV_QP_ ACCESS_FLAGS : Fill the value in attr->qp_ access_flags : IBV_QP_PKEY_INDEX: Fill the value in attr->pkey_index: IBV_QP_PORT: Fill the value in attr->port_num: IBV_QP_QKEY: Fill the value in attr->qkey: IBV_QP_AV: Fill the value in attr->ah_attr: IBV_QP_PATH_MTU: Fill the value in attr->path_mtu: IBV_QP_TIMEOUT: Fill the value in attr->timeout: IBV_QP_RETRY_CNT, The argument is either 0 or the bitwise OR of one or more of the following flags: IBV_QP_STATE Modify qp_state IBV_QP_CUR_STATE Set cur_qp_state IBV_QP_EN_SQD_ASYNC_NOTIFY Set en_sqd_async_notify IBV_QP_ ACCESS_FLAGS Set qp_ access_flags IBV_QP_PKEY_INDEX Set pkey_index IBV_QP_PORT Set port_num IBV_QP_QKEY Set qkey IBV_QP_AV Set ah_attr.
The argument is either 0 or the bitwise OR of one or more of the following flags: IBV_QP_STATE Modify qp_state IBV_QP_CUR_STATE Set cur_qp_state IBV_QP_EN_SQD_ASYNC_NOTIFY Set en_sqd_async_notify IBV_QP_ ACCESS_FLAGS Set qp_ access_flags IBV_QP_PKEY_INDEX Set pkey_index IBV_QP_PORT Set port_num IBV_QP_QKEY Set qkey IBV_QP_AV Set ah_attr.
1/12/2013 · dest_qp_num. A 24 bits value of the remote QP number of RC and UC QPs when sending data, packets will be sent to this QP number and when receiving data, packets will be accepted only from this QP number. qp_access_flags. Allowed access flags of the remote operations for incoming packets of RC and UC QPs.
ibv_modify_qp () – RDMAmojo RDMAmojo, ibv_query_qp () – RDMAmojo – RDMAmojo – RDMAmojo, ibv_modify_qp () – RDMAmojo RDMAmojo, ibv_modify_qp () – RDMAmojo RDMAmojo, 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 defined in . struct ibv_qp_attr { enum ibv_qp_state qp_state /* Current QP state */ enum ibv_qp_state cur_qp_state /* Current QP state …
8/13/2010 · I suspect the problem may be related to the qp_attr.qp_ access_flags . The value of this flag is 2, which is IB_ACCESS_REMOTE_WRITE. The QP is being transitioned through it’s states by rdma_cm. I have tried, but not been successful in modifying the qp_ access_flags after the QPs have been initialized by rdma_cm.
ibv_qp_ access_flags = 1 << 3, ibv_qp_pkey_index = 1 << 4, ibv_qp_port = 1 << 5, ibv_qp_qkey = 1 << 6, ibv_qp_av = 1 << 7, ibv_qp_path_mtu = 1 << 8, ibv_qp_timeout = 1 << 9, ibv_qp_retry_cnt = 1 << 10, ibv_qp_rnr_retry = 1 << 11, ibv_qp_rq_psn = 1 << 12, ibv_qp_max_qp_rd_atomic = 1 << 13, ibv_qp_alt_path = 1 << 14, ibv_qp_min_rnr_timer = 1 << 15, ibv_qp_sq_psn = 1 << 16,, The attr_mask parameter specifies the QP attributes to be modified. The argument is either 0 or bitwise OR of one or more of the following flags: IBV_QP_STATE. Modify qp_state. IBV_QP_CUR_STATE. Set cur_qp_state. IBV_QP_EN_SQD_ASYNC_NOTIFY. Set en_sqd_async_notify. IBV_QP_ ACCESS_FLAGS .Remote Direct Memory Access (RDMA) is the remote memory management capability that allows server-to-server data movement directly between application memory without any CPU. involvement. RDMA over Converged Ethernet (RoCE) is a mechanism to provide this efficient data transfer with very low latencies on lossless Ethernet networks.
