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