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572 lines
17 KiB
572 lines
17 KiB
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
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/* |
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* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. |
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* Copyright (c) 2004 Topspin Corporation. All rights reserved. |
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* Copyright (c) 2004 Voltaire Corporation. All rights reserved. |
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
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* Copyright (c) 2019, Mellanox Technologies inc. All rights reserved. |
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*/ |
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#ifndef IB_CM_H |
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#define IB_CM_H |
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#include <rdma/ib_mad.h> |
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#include <rdma/ib_sa.h> |
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#include <rdma/rdma_cm.h> |
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enum ib_cm_state { |
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IB_CM_IDLE, |
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IB_CM_LISTEN, |
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IB_CM_REQ_SENT, |
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IB_CM_REQ_RCVD, |
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IB_CM_MRA_REQ_SENT, |
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IB_CM_MRA_REQ_RCVD, |
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IB_CM_REP_SENT, |
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IB_CM_REP_RCVD, |
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IB_CM_MRA_REP_SENT, |
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IB_CM_MRA_REP_RCVD, |
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IB_CM_ESTABLISHED, |
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IB_CM_DREQ_SENT, |
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IB_CM_DREQ_RCVD, |
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IB_CM_TIMEWAIT, |
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IB_CM_SIDR_REQ_SENT, |
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IB_CM_SIDR_REQ_RCVD |
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}; |
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enum ib_cm_lap_state { |
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IB_CM_LAP_UNINIT, |
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IB_CM_LAP_IDLE, |
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IB_CM_LAP_SENT, |
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IB_CM_LAP_RCVD, |
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IB_CM_MRA_LAP_SENT, |
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IB_CM_MRA_LAP_RCVD, |
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}; |
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enum ib_cm_event_type { |
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IB_CM_REQ_ERROR, |
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IB_CM_REQ_RECEIVED, |
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IB_CM_REP_ERROR, |
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IB_CM_REP_RECEIVED, |
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IB_CM_RTU_RECEIVED, |
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IB_CM_USER_ESTABLISHED, |
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IB_CM_DREQ_ERROR, |
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IB_CM_DREQ_RECEIVED, |
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IB_CM_DREP_RECEIVED, |
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IB_CM_TIMEWAIT_EXIT, |
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IB_CM_MRA_RECEIVED, |
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IB_CM_REJ_RECEIVED, |
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IB_CM_LAP_ERROR, |
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IB_CM_LAP_RECEIVED, |
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IB_CM_APR_RECEIVED, |
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IB_CM_SIDR_REQ_ERROR, |
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IB_CM_SIDR_REQ_RECEIVED, |
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IB_CM_SIDR_REP_RECEIVED |
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}; |
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enum ib_cm_data_size { |
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IB_CM_REQ_PRIVATE_DATA_SIZE = 92, |
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IB_CM_MRA_PRIVATE_DATA_SIZE = 222, |
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IB_CM_REJ_PRIVATE_DATA_SIZE = 148, |
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IB_CM_REP_PRIVATE_DATA_SIZE = 196, |
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IB_CM_RTU_PRIVATE_DATA_SIZE = 224, |
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IB_CM_DREQ_PRIVATE_DATA_SIZE = 220, |
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IB_CM_DREP_PRIVATE_DATA_SIZE = 224, |
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IB_CM_REJ_ARI_LENGTH = 72, |
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IB_CM_LAP_PRIVATE_DATA_SIZE = 168, |
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IB_CM_APR_PRIVATE_DATA_SIZE = 148, |
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IB_CM_APR_INFO_LENGTH = 72, |
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IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216, |
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IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136, |
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IB_CM_SIDR_REP_INFO_LENGTH = 72, |
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}; |
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struct ib_cm_id; |
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struct ib_cm_req_event_param { |
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struct ib_cm_id *listen_id; |
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/* P_Key that was used by the GMP's BTH header */ |
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u16 bth_pkey; |
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u8 port; |
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struct sa_path_rec *primary_path; |
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struct sa_path_rec *alternate_path; |
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/* |
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* SGID attribute of the primary path. Currently only |
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* useful for RoCE. Alternate path GID attributes |
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* are not yet supported. |
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*/ |
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const struct ib_gid_attr *ppath_sgid_attr; |
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__be64 remote_ca_guid; |
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u32 remote_qkey; |
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u32 remote_qpn; |
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enum ib_qp_type qp_type; |
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u32 starting_psn; |
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u8 responder_resources; |
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u8 initiator_depth; |
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unsigned int local_cm_response_timeout:5; |
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unsigned int flow_control:1; |
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unsigned int remote_cm_response_timeout:5; |
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unsigned int retry_count:3; |
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unsigned int rnr_retry_count:3; |
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unsigned int srq:1; |
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struct rdma_ucm_ece ece; |
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}; |
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struct ib_cm_rep_event_param { |
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__be64 remote_ca_guid; |
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u32 remote_qkey; |
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u32 remote_qpn; |
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u32 starting_psn; |
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u8 responder_resources; |
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u8 initiator_depth; |
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unsigned int target_ack_delay:5; |
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unsigned int failover_accepted:2; |
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unsigned int flow_control:1; |
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unsigned int rnr_retry_count:3; |
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unsigned int srq:1; |
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struct rdma_ucm_ece ece; |
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}; |
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enum ib_cm_rej_reason { |
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IB_CM_REJ_NO_QP = 1, |
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IB_CM_REJ_NO_EEC = 2, |
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IB_CM_REJ_NO_RESOURCES = 3, |
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IB_CM_REJ_TIMEOUT = 4, |
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IB_CM_REJ_UNSUPPORTED = 5, |
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IB_CM_REJ_INVALID_COMM_ID = 6, |
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IB_CM_REJ_INVALID_COMM_INSTANCE = 7, |
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IB_CM_REJ_INVALID_SERVICE_ID = 8, |
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IB_CM_REJ_INVALID_TRANSPORT_TYPE = 9, |
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IB_CM_REJ_STALE_CONN = 10, |
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IB_CM_REJ_RDC_NOT_EXIST = 11, |
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IB_CM_REJ_INVALID_GID = 12, |
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IB_CM_REJ_INVALID_LID = 13, |
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IB_CM_REJ_INVALID_SL = 14, |
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IB_CM_REJ_INVALID_TRAFFIC_CLASS = 15, |
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IB_CM_REJ_INVALID_HOP_LIMIT = 16, |
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IB_CM_REJ_INVALID_PACKET_RATE = 17, |
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IB_CM_REJ_INVALID_ALT_GID = 18, |
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IB_CM_REJ_INVALID_ALT_LID = 19, |
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IB_CM_REJ_INVALID_ALT_SL = 20, |
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IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS = 21, |
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IB_CM_REJ_INVALID_ALT_HOP_LIMIT = 22, |
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IB_CM_REJ_INVALID_ALT_PACKET_RATE = 23, |
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IB_CM_REJ_PORT_CM_REDIRECT = 24, |
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IB_CM_REJ_PORT_REDIRECT = 25, |
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IB_CM_REJ_INVALID_MTU = 26, |
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IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES = 27, |
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IB_CM_REJ_CONSUMER_DEFINED = 28, |
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IB_CM_REJ_INVALID_RNR_RETRY = 29, |
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IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID = 30, |
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IB_CM_REJ_INVALID_CLASS_VERSION = 31, |
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IB_CM_REJ_INVALID_FLOW_LABEL = 32, |
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IB_CM_REJ_INVALID_ALT_FLOW_LABEL = 33, |
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IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED = 35, |
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}; |
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struct ib_cm_rej_event_param { |
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enum ib_cm_rej_reason reason; |
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void *ari; |
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u8 ari_length; |
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}; |
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struct ib_cm_mra_event_param { |
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u8 service_timeout; |
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}; |
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struct ib_cm_lap_event_param { |
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struct sa_path_rec *alternate_path; |
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}; |
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enum ib_cm_apr_status { |
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IB_CM_APR_SUCCESS, |
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IB_CM_APR_INVALID_COMM_ID, |
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IB_CM_APR_UNSUPPORTED, |
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IB_CM_APR_REJECT, |
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IB_CM_APR_REDIRECT, |
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IB_CM_APR_IS_CURRENT, |
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IB_CM_APR_INVALID_QPN_EECN, |
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IB_CM_APR_INVALID_LID, |
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IB_CM_APR_INVALID_GID, |
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IB_CM_APR_INVALID_FLOW_LABEL, |
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IB_CM_APR_INVALID_TCLASS, |
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IB_CM_APR_INVALID_HOP_LIMIT, |
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IB_CM_APR_INVALID_PACKET_RATE, |
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IB_CM_APR_INVALID_SL |
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}; |
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struct ib_cm_apr_event_param { |
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enum ib_cm_apr_status ap_status; |
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void *apr_info; |
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u8 info_len; |
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}; |
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struct ib_cm_sidr_req_event_param { |
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struct ib_cm_id *listen_id; |
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__be64 service_id; |
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/* |
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* SGID attribute of the request. Currently only |
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* useful for RoCE. |
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*/ |
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const struct ib_gid_attr *sgid_attr; |
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/* P_Key that was used by the GMP's BTH header */ |
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u16 bth_pkey; |
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u8 port; |
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u16 pkey; |
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}; |
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enum ib_cm_sidr_status { |
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IB_SIDR_SUCCESS, |
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IB_SIDR_UNSUPPORTED, |
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IB_SIDR_REJECT, |
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IB_SIDR_NO_QP, |
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IB_SIDR_REDIRECT, |
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IB_SIDR_UNSUPPORTED_VERSION |
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}; |
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struct ib_cm_sidr_rep_event_param { |
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enum ib_cm_sidr_status status; |
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u32 qkey; |
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u32 qpn; |
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void *info; |
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const struct ib_gid_attr *sgid_attr; |
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u8 info_len; |
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}; |
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struct ib_cm_event { |
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enum ib_cm_event_type event; |
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union { |
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struct ib_cm_req_event_param req_rcvd; |
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struct ib_cm_rep_event_param rep_rcvd; |
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/* No data for RTU received events. */ |
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struct ib_cm_rej_event_param rej_rcvd; |
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struct ib_cm_mra_event_param mra_rcvd; |
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struct ib_cm_lap_event_param lap_rcvd; |
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struct ib_cm_apr_event_param apr_rcvd; |
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/* No data for DREQ/DREP received events. */ |
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struct ib_cm_sidr_req_event_param sidr_req_rcvd; |
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struct ib_cm_sidr_rep_event_param sidr_rep_rcvd; |
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enum ib_wc_status send_status; |
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} param; |
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void *private_data; |
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}; |
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#define CM_REQ_ATTR_ID cpu_to_be16(0x0010) |
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#define CM_MRA_ATTR_ID cpu_to_be16(0x0011) |
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#define CM_REJ_ATTR_ID cpu_to_be16(0x0012) |
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#define CM_REP_ATTR_ID cpu_to_be16(0x0013) |
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#define CM_RTU_ATTR_ID cpu_to_be16(0x0014) |
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#define CM_DREQ_ATTR_ID cpu_to_be16(0x0015) |
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#define CM_DREP_ATTR_ID cpu_to_be16(0x0016) |
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#define CM_SIDR_REQ_ATTR_ID cpu_to_be16(0x0017) |
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#define CM_SIDR_REP_ATTR_ID cpu_to_be16(0x0018) |
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#define CM_LAP_ATTR_ID cpu_to_be16(0x0019) |
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#define CM_APR_ATTR_ID cpu_to_be16(0x001A) |
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/** |
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* ib_cm_handler - User-defined callback to process communication events. |
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* @cm_id: Communication identifier associated with the reported event. |
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* @event: Information about the communication event. |
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* |
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* IB_CM_REQ_RECEIVED and IB_CM_SIDR_REQ_RECEIVED communication events |
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* generated as a result of listen requests result in the allocation of a |
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* new @cm_id. The new @cm_id is returned to the user through this callback. |
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* Clients are responsible for destroying the new @cm_id. For peer-to-peer |
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* IB_CM_REQ_RECEIVED and all other events, the returned @cm_id corresponds |
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* to a user's existing communication identifier. |
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* |
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* Users may not call ib_destroy_cm_id while in the context of this callback; |
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* however, returning a non-zero value instructs the communication manager to |
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* destroy the @cm_id after the callback completes. |
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*/ |
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typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id, |
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const struct ib_cm_event *event); |
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struct ib_cm_id { |
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ib_cm_handler cm_handler; |
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void *context; |
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struct ib_device *device; |
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__be64 service_id; |
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__be64 service_mask; |
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enum ib_cm_state state; /* internal CM/debug use */ |
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enum ib_cm_lap_state lap_state; /* internal CM/debug use */ |
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__be32 local_id; |
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__be32 remote_id; |
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u32 remote_cm_qpn; /* 1 unless redirected */ |
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}; |
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/** |
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* ib_create_cm_id - Allocate a communication identifier. |
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* @device: Device associated with the cm_id. All related communication will |
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* be associated with the specified device. |
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* @cm_handler: Callback invoked to notify the user of CM events. |
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* @context: User specified context associated with the communication |
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* identifier. |
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* |
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* Communication identifiers are used to track connection states, service |
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* ID resolution requests, and listen requests. |
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*/ |
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struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
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ib_cm_handler cm_handler, |
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void *context); |
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/** |
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* ib_destroy_cm_id - Destroy a connection identifier. |
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* @cm_id: Connection identifier to destroy. |
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* |
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* This call blocks until the connection identifier is destroyed. |
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*/ |
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void ib_destroy_cm_id(struct ib_cm_id *cm_id); |
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#define IB_SERVICE_ID_AGN_MASK cpu_to_be64(0xFF00000000000000ULL) |
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#define IB_CM_ASSIGN_SERVICE_ID cpu_to_be64(0x0200000000000000ULL) |
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#define IB_CMA_SERVICE_ID cpu_to_be64(0x0000000001000000ULL) |
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#define IB_CMA_SERVICE_ID_MASK cpu_to_be64(0xFFFFFFFFFF000000ULL) |
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#define IB_SDP_SERVICE_ID cpu_to_be64(0x0000000000010000ULL) |
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#define IB_SDP_SERVICE_ID_MASK cpu_to_be64(0xFFFFFFFFFFFF0000ULL) |
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/** |
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* ib_cm_listen - Initiates listening on the specified service ID for |
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* connection and service ID resolution requests. |
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* @cm_id: Connection identifier associated with the listen request. |
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* @service_id: Service identifier matched against incoming connection |
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* and service ID resolution requests. The service ID should be specified |
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* network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will |
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* assign a service ID to the caller. |
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* @service_mask: Mask applied to service ID used to listen across a |
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* range of service IDs. If set to 0, the service ID is matched |
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* exactly. This parameter is ignored if %service_id is set to |
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* IB_CM_ASSIGN_SERVICE_ID. |
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*/ |
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int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, |
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__be64 service_mask); |
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struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, |
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ib_cm_handler cm_handler, |
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__be64 service_id); |
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struct ib_cm_req_param { |
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struct sa_path_rec *primary_path; |
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struct sa_path_rec *alternate_path; |
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const struct ib_gid_attr *ppath_sgid_attr; |
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__be64 service_id; |
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u32 qp_num; |
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enum ib_qp_type qp_type; |
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u32 starting_psn; |
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const void *private_data; |
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u8 private_data_len; |
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u8 responder_resources; |
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u8 initiator_depth; |
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u8 remote_cm_response_timeout; |
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u8 flow_control; |
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u8 local_cm_response_timeout; |
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u8 retry_count; |
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u8 rnr_retry_count; |
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u8 max_cm_retries; |
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u8 srq; |
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struct rdma_ucm_ece ece; |
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}; |
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/** |
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* ib_send_cm_req - Sends a connection request to the remote node. |
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* @cm_id: Connection identifier that will be associated with the |
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* connection request. |
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* @param: Connection request information needed to establish the |
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* connection. |
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*/ |
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int ib_send_cm_req(struct ib_cm_id *cm_id, |
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struct ib_cm_req_param *param); |
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struct ib_cm_rep_param { |
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u32 qp_num; |
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u32 starting_psn; |
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const void *private_data; |
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u8 private_data_len; |
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u8 responder_resources; |
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u8 initiator_depth; |
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u8 failover_accepted; |
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u8 flow_control; |
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u8 rnr_retry_count; |
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u8 srq; |
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struct rdma_ucm_ece ece; |
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}; |
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/** |
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* ib_send_cm_rep - Sends a connection reply in response to a connection |
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* request. |
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* @cm_id: Connection identifier that will be associated with the |
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* connection request. |
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* @param: Connection reply information needed to establish the |
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* connection. |
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*/ |
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int ib_send_cm_rep(struct ib_cm_id *cm_id, |
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struct ib_cm_rep_param *param); |
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/** |
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* ib_send_cm_rtu - Sends a connection ready to use message in response |
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* to a connection reply message. |
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* @cm_id: Connection identifier associated with the connection request. |
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* @private_data: Optional user-defined private data sent with the |
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* ready to use message. |
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* @private_data_len: Size of the private data buffer, in bytes. |
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*/ |
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int ib_send_cm_rtu(struct ib_cm_id *cm_id, |
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const void *private_data, |
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u8 private_data_len); |
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/** |
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* ib_send_cm_dreq - Sends a disconnection request for an existing |
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* connection. |
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* @cm_id: Connection identifier associated with the connection being |
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* released. |
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* @private_data: Optional user-defined private data sent with the |
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* disconnection request message. |
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* @private_data_len: Size of the private data buffer, in bytes. |
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*/ |
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int ib_send_cm_dreq(struct ib_cm_id *cm_id, |
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const void *private_data, |
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u8 private_data_len); |
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/** |
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* ib_send_cm_drep - Sends a disconnection reply to a disconnection request. |
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* @cm_id: Connection identifier associated with the connection being |
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* released. |
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* @private_data: Optional user-defined private data sent with the |
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* disconnection reply message. |
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* @private_data_len: Size of the private data buffer, in bytes. |
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* |
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* If the cm_id is in the correct state, the CM will transition the connection |
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* to the timewait state, even if an error occurs sending the DREP message. |
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*/ |
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int ib_send_cm_drep(struct ib_cm_id *cm_id, |
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const void *private_data, |
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u8 private_data_len); |
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/** |
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* ib_cm_notify - Notifies the CM of an event reported to the consumer. |
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* @cm_id: Connection identifier to transition to established. |
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* @event: Type of event. |
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* |
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* This routine should be invoked by users to notify the CM of relevant |
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* communication events. Events that should be reported to the CM and |
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* when to report them are: |
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* |
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* IB_EVENT_COMM_EST - Used when a message is received on a connected |
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* QP before an RTU has been received. |
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* IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over |
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* to the alternate path. |
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*/ |
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int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event); |
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|
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/** |
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* ib_send_cm_rej - Sends a connection rejection message to the |
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* remote node. |
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* @cm_id: Connection identifier associated with the connection being |
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* rejected. |
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* @reason: Reason for the connection request rejection. |
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* @ari: Optional additional rejection information. |
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* @ari_length: Size of the additional rejection information, in bytes. |
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* @private_data: Optional user-defined private data sent with the |
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* rejection message. |
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* @private_data_len: Size of the private data buffer, in bytes. |
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*/ |
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int ib_send_cm_rej(struct ib_cm_id *cm_id, |
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enum ib_cm_rej_reason reason, |
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void *ari, |
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u8 ari_length, |
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const void *private_data, |
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u8 private_data_len); |
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#define IB_CM_MRA_FLAG_DELAY 0x80 /* Send MRA only after a duplicate msg */ |
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|
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/** |
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* ib_send_cm_mra - Sends a message receipt acknowledgement to a connection |
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* message. |
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* @cm_id: Connection identifier associated with the connection message. |
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* @service_timeout: The lower 5-bits specify the maximum time required for |
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* the sender to reply to the connection message. The upper 3-bits |
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* specify additional control flags. |
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* @private_data: Optional user-defined private data sent with the |
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* message receipt acknowledgement. |
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* @private_data_len: Size of the private data buffer, in bytes. |
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*/ |
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int ib_send_cm_mra(struct ib_cm_id *cm_id, |
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u8 service_timeout, |
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const void *private_data, |
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u8 private_data_len); |
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|
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/** |
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* ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning |
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* to a specified QP state. |
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* @cm_id: Communication identifier associated with the QP attributes to |
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* initialize. |
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* @qp_attr: On input, specifies the desired QP state. On output, the |
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* mandatory and desired optional attributes will be set in order to |
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* modify the QP to the specified state. |
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* @qp_attr_mask: The QP attribute mask that may be used to transition the |
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* QP to the specified state. |
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* |
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* Users must set the @qp_attr->qp_state to the desired QP state. This call |
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* will set all required attributes for the given transition, along with |
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* known optional attributes. Users may override the attributes returned from |
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* this call before calling ib_modify_qp. |
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*/ |
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int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, |
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struct ib_qp_attr *qp_attr, |
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int *qp_attr_mask); |
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struct ib_cm_sidr_req_param { |
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struct sa_path_rec *path; |
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const struct ib_gid_attr *sgid_attr; |
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__be64 service_id; |
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unsigned long timeout_ms; |
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const void *private_data; |
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u8 private_data_len; |
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u8 max_cm_retries; |
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}; |
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/** |
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* ib_send_cm_sidr_req - Sends a service ID resolution request to the |
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* remote node. |
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* @cm_id: Communication identifier that will be associated with the |
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* service ID resolution request. |
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* @param: Service ID resolution request information. |
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*/ |
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int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, |
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struct ib_cm_sidr_req_param *param); |
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|
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struct ib_cm_sidr_rep_param { |
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u32 qp_num; |
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u32 qkey; |
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enum ib_cm_sidr_status status; |
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const void *info; |
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u8 info_length; |
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const void *private_data; |
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u8 private_data_len; |
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struct rdma_ucm_ece ece; |
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}; |
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|
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/** |
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* ib_send_cm_sidr_rep - Sends a service ID resolution reply to the |
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* remote node. |
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* @cm_id: Communication identifier associated with the received service ID |
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* resolution request. |
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* @param: Service ID resolution reply information. |
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*/ |
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int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
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struct ib_cm_sidr_rep_param *param); |
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|
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/** |
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* ibcm_reject_msg - return a pointer to a reject message string. |
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* @reason: Value returned in the REJECT event status field. |
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*/ |
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const char *__attribute_const__ ibcm_reject_msg(int reason); |
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#endif /* IB_CM_H */
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