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226 lines
7.1 KiB
226 lines
7.1 KiB
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
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/* |
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* Copyright (c) 2005 Network Appliance, Inc. All rights reserved. |
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* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. |
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*/ |
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#ifndef IW_CM_H |
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#define IW_CM_H |
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#include <linux/in.h> |
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#include <rdma/ib_cm.h> |
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struct iw_cm_id; |
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enum iw_cm_event_type { |
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IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */ |
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IW_CM_EVENT_CONNECT_REPLY, /* reply from active connect request */ |
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IW_CM_EVENT_ESTABLISHED, /* passive side accept successful */ |
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IW_CM_EVENT_DISCONNECT, /* orderly shutdown */ |
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IW_CM_EVENT_CLOSE /* close complete */ |
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}; |
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struct iw_cm_event { |
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enum iw_cm_event_type event; |
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int status; |
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struct sockaddr_storage local_addr; |
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struct sockaddr_storage remote_addr; |
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void *private_data; |
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void *provider_data; |
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u8 private_data_len; |
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u8 ord; |
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u8 ird; |
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}; |
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/** |
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* iw_cm_handler - Function to be called by the IW CM when delivering events |
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* to the client. |
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* |
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* @cm_id: The IW CM identifier associated with the event. |
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* @event: Pointer to the event structure. |
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*/ |
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typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id, |
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struct iw_cm_event *event); |
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/** |
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* iw_event_handler - Function called by the provider when delivering provider |
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* events to the IW CM. Returns either 0 indicating the event was processed |
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* or -errno if the event could not be processed. |
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* |
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* @cm_id: The IW CM identifier associated with the event. |
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* @event: Pointer to the event structure. |
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*/ |
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typedef int (*iw_event_handler)(struct iw_cm_id *cm_id, |
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struct iw_cm_event *event); |
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struct iw_cm_id { |
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iw_cm_handler cm_handler; /* client callback function */ |
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void *context; /* client cb context */ |
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struct ib_device *device; |
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struct sockaddr_storage local_addr; /* local addr */ |
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struct sockaddr_storage remote_addr; |
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struct sockaddr_storage m_local_addr; /* nmapped local addr */ |
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struct sockaddr_storage m_remote_addr; /* nmapped rem addr */ |
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void *provider_data; /* provider private data */ |
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iw_event_handler event_handler; /* cb for provider |
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events */ |
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/* Used by provider to add and remove refs on IW cm_id */ |
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void (*add_ref)(struct iw_cm_id *); |
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void (*rem_ref)(struct iw_cm_id *); |
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u8 tos; |
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bool tos_set:1; |
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bool mapped:1; |
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bool afonly:1; |
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}; |
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struct iw_cm_conn_param { |
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const void *private_data; |
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u16 private_data_len; |
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u32 ord; |
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u32 ird; |
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u32 qpn; |
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}; |
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enum iw_flags { |
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/* |
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* This flag allows the iwcm and iwpmd to still advertise |
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* mappings but the real and mapped port numbers are the |
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* same. Further, iwpmd will not bind any user socket to |
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* reserve the port. This is required for soft iwarp |
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* to play in the port mapped iwarp space. |
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*/ |
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IW_F_NO_PORT_MAP = (1 << 0), |
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}; |
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/** |
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* iw_create_cm_id - Create an IW CM identifier. |
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* |
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* @device: The IB device on which to create the IW CM identier. |
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* @event_handler: User callback invoked to report events associated with the |
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* returned IW CM identifier. |
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* @context: User specified context associated with the id. |
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*/ |
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struct iw_cm_id *iw_create_cm_id(struct ib_device *device, |
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iw_cm_handler cm_handler, void *context); |
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/** |
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* iw_destroy_cm_id - Destroy an IW CM identifier. |
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* |
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* @cm_id: The previously created IW CM identifier to destroy. |
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* |
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* The client can assume that no events will be delivered for the CM ID after |
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* this function returns. |
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*/ |
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void iw_destroy_cm_id(struct iw_cm_id *cm_id); |
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/** |
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* iw_cm_bind_qp - Unbind the specified IW CM identifier and QP |
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* |
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* @cm_id: The IW CM idenfier to unbind from the QP. |
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* @qp: The QP |
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* |
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* This is called by the provider when destroying the QP to ensure |
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* that any references held by the IWCM are released. It may also |
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* be called by the IWCM when destroying a CM_ID to that any |
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* references held by the provider are released. |
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*/ |
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void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp); |
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/** |
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* iw_cm_get_qp - Return the ib_qp associated with a QPN |
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* |
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* @ib_device: The IB device |
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* @qpn: The queue pair number |
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*/ |
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struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn); |
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/** |
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* iw_cm_listen - Listen for incoming connection requests on the |
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* specified IW CM id. |
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* |
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* @cm_id: The IW CM identifier. |
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* @backlog: The maximum number of outstanding un-accepted inbound listen |
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* requests to queue. |
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* |
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* The source address and port number are specified in the IW CM identifier |
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* structure. |
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*/ |
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int iw_cm_listen(struct iw_cm_id *cm_id, int backlog); |
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/** |
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* iw_cm_accept - Called to accept an incoming connect request. |
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* |
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* @cm_id: The IW CM identifier associated with the connection request. |
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* @iw_param: Pointer to a structure containing connection establishment |
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* parameters. |
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* |
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* The specified cm_id will have been provided in the event data for a |
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* CONNECT_REQUEST event. Subsequent events related to this connection will be |
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* delivered to the specified IW CM identifier prior and may occur prior to |
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* the return of this function. If this function returns a non-zero value, the |
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* client can assume that no events will be delivered to the specified IW CM |
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* identifier. |
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*/ |
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int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param); |
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/** |
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* iw_cm_reject - Reject an incoming connection request. |
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* |
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* @cm_id: Connection identifier associated with the request. |
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* @private_daa: Pointer to data to deliver to the remote peer as part of the |
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* reject message. |
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* @private_data_len: The number of bytes in the private_data parameter. |
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* |
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* The client can assume that no events will be delivered to the specified IW |
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* CM identifier following the return of this function. The private_data |
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* buffer is available for reuse when this function returns. |
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*/ |
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int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data, |
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u8 private_data_len); |
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/** |
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* iw_cm_connect - Called to request a connection to a remote peer. |
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* |
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* @cm_id: The IW CM identifier for the connection. |
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* @iw_param: Pointer to a structure containing connection establishment |
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* parameters. |
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* |
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* Events may be delivered to the specified IW CM identifier prior to the |
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* return of this function. If this function returns a non-zero value, the |
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* client can assume that no events will be delivered to the specified IW CM |
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* identifier. |
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*/ |
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int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param); |
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/** |
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* iw_cm_disconnect - Close the specified connection. |
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* |
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* @cm_id: The IW CM identifier to close. |
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* @abrupt: If 0, the connection will be closed gracefully, otherwise, the |
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* connection will be reset. |
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* |
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* The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is |
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* delivered. |
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*/ |
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int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt); |
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/** |
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* iw_cm_init_qp_attr - Called to initialize the attributes of the QP |
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* associated with a IW CM identifier. |
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* |
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* @cm_id: The IW CM identifier associated with the QP |
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* @qp_attr: Pointer to the QP attributes structure. |
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* @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are |
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* valid. |
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*/ |
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int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr, |
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int *qp_attr_mask); |
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/** |
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* iwcm_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__ iwcm_reject_msg(int reason); |
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#endif /* IW_CM_H */
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