629 строки
19 KiB
C
629 строки
19 KiB
C
/*
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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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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if !defined(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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/* ib_cm and ib_user_cm modules share /sys/class/infiniband_cm */
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extern struct class cm_class;
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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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};
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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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};
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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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};
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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 peer_to_peer;
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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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};
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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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};
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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
|
|
* disconnection reply message.
|
|
* @private_data_len: Size of the private data buffer, in bytes.
|
|
*
|
|
* If the cm_id is in the correct state, the CM will transition the connection
|
|
* to the timewait state, even if an error occurs sending the DREP message.
|
|
*/
|
|
int ib_send_cm_drep(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
/**
|
|
* ib_cm_notify - Notifies the CM of an event reported to the consumer.
|
|
* @cm_id: Connection identifier to transition to established.
|
|
* @event: Type of event.
|
|
*
|
|
* This routine should be invoked by users to notify the CM of relevant
|
|
* communication events. Events that should be reported to the CM and
|
|
* when to report them are:
|
|
*
|
|
* IB_EVENT_COMM_EST - Used when a message is received on a connected
|
|
* QP before an RTU has been received.
|
|
* IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over
|
|
* to the alternate path.
|
|
*/
|
|
int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event);
|
|
|
|
/**
|
|
* ib_send_cm_rej - Sends a connection rejection message to the
|
|
* remote node.
|
|
* @cm_id: Connection identifier associated with the connection being
|
|
* rejected.
|
|
* @reason: Reason for the connection request rejection.
|
|
* @ari: Optional additional rejection information.
|
|
* @ari_length: Size of the additional rejection information, in bytes.
|
|
* @private_data: Optional user-defined private data sent with the
|
|
* rejection message.
|
|
* @private_data_len: Size of the private data buffer, in bytes.
|
|
*/
|
|
int ib_send_cm_rej(struct ib_cm_id *cm_id,
|
|
enum ib_cm_rej_reason reason,
|
|
void *ari,
|
|
u8 ari_length,
|
|
const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
#define IB_CM_MRA_FLAG_DELAY 0x80 /* Send MRA only after a duplicate msg */
|
|
|
|
/**
|
|
* ib_send_cm_mra - Sends a message receipt acknowledgement to a connection
|
|
* message.
|
|
* @cm_id: Connection identifier associated with the connection message.
|
|
* @service_timeout: The lower 5-bits specify the maximum time required for
|
|
* the sender to reply to the connection message. The upper 3-bits
|
|
* specify additional control flags.
|
|
* @private_data: Optional user-defined private data sent with the
|
|
* message receipt acknowledgement.
|
|
* @private_data_len: Size of the private data buffer, in bytes.
|
|
*/
|
|
int ib_send_cm_mra(struct ib_cm_id *cm_id,
|
|
u8 service_timeout,
|
|
const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
/**
|
|
* ib_send_cm_lap - Sends a load alternate path request.
|
|
* @cm_id: Connection identifier associated with the load alternate path
|
|
* message.
|
|
* @alternate_path: A path record that identifies the alternate path to
|
|
* load.
|
|
* @private_data: Optional user-defined private data sent with the
|
|
* load alternate path message.
|
|
* @private_data_len: Size of the private data buffer, in bytes.
|
|
*/
|
|
int ib_send_cm_lap(struct ib_cm_id *cm_id,
|
|
struct sa_path_rec *alternate_path,
|
|
const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
/**
|
|
* ib_cm_init_qp_attr - Initializes the QP attributes for use in transitioning
|
|
* to a specified QP state.
|
|
* @cm_id: Communication identifier associated with the QP attributes to
|
|
* initialize.
|
|
* @qp_attr: On input, specifies the desired QP state. On output, the
|
|
* mandatory and desired optional attributes will be set in order to
|
|
* modify the QP to the specified state.
|
|
* @qp_attr_mask: The QP attribute mask that may be used to transition the
|
|
* QP to the specified state.
|
|
*
|
|
* Users must set the @qp_attr->qp_state to the desired QP state. This call
|
|
* will set all required attributes for the given transition, along with
|
|
* known optional attributes. Users may override the attributes returned from
|
|
* this call before calling ib_modify_qp.
|
|
*/
|
|
int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
|
|
struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask);
|
|
|
|
/**
|
|
* ib_send_cm_apr - Sends an alternate path response message in response to
|
|
* a load alternate path request.
|
|
* @cm_id: Connection identifier associated with the alternate path response.
|
|
* @status: Reply status sent with the alternate path response.
|
|
* @info: Optional additional information sent with the alternate path
|
|
* response.
|
|
* @info_length: Size of the additional information, in bytes.
|
|
* @private_data: Optional user-defined private data sent with the
|
|
* alternate path response message.
|
|
* @private_data_len: Size of the private data buffer, in bytes.
|
|
*/
|
|
int ib_send_cm_apr(struct ib_cm_id *cm_id,
|
|
enum ib_cm_apr_status status,
|
|
void *info,
|
|
u8 info_length,
|
|
const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
struct ib_cm_sidr_req_param {
|
|
struct sa_path_rec *path;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
__be64 service_id;
|
|
int timeout_ms;
|
|
const void *private_data;
|
|
u8 private_data_len;
|
|
u8 max_cm_retries;
|
|
};
|
|
|
|
/**
|
|
* ib_send_cm_sidr_req - Sends a service ID resolution request to the
|
|
* remote node.
|
|
* @cm_id: Communication identifier that will be associated with the
|
|
* service ID resolution request.
|
|
* @param: Service ID resolution request information.
|
|
*/
|
|
int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
|
|
struct ib_cm_sidr_req_param *param);
|
|
|
|
struct ib_cm_sidr_rep_param {
|
|
u32 qp_num;
|
|
u32 qkey;
|
|
enum ib_cm_sidr_status status;
|
|
const void *info;
|
|
u8 info_length;
|
|
const void *private_data;
|
|
u8 private_data_len;
|
|
};
|
|
|
|
/**
|
|
* ib_send_cm_sidr_rep - Sends a service ID resolution reply to the
|
|
* remote node.
|
|
* @cm_id: Communication identifier associated with the received service ID
|
|
* resolution request.
|
|
* @param: Service ID resolution reply information.
|
|
*/
|
|
int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
|
|
struct ib_cm_sidr_rep_param *param);
|
|
|
|
/**
|
|
* ibcm_reject_msg - return a pointer to a reject message string.
|
|
* @reason: Value returned in the REJECT event status field.
|
|
*/
|
|
const char *__attribute_const__ ibcm_reject_msg(int reason);
|
|
|
|
#endif /* IB_CM_H */
|