[linux.git] / include / rdma / iw_cm.h

/*
 * Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef IW_CM_H
#define IW_CM_H

#include <linux/in.h>
#include <rdma/ib_cm.h>

struct iw_cm_id;

enum iw_cm_event_type {
	IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
	IW_CM_EVENT_CONNECT_REPLY,	 /* reply from active connect request */
	IW_CM_EVENT_ESTABLISHED,	 /* passive side accept successful */
	IW_CM_EVENT_DISCONNECT,		 /* orderly shutdown */
	IW_CM_EVENT_CLOSE		 /* close complete */
};

struct iw_cm_event {
	enum iw_cm_event_type event;
	int			 status;
	struct sockaddr_in local_addr;
	struct sockaddr_in remote_addr;
	void *private_data;
	u8 private_data_len;
	void *provider_data;
};

/**
 * iw_cm_handler - Function to be called by the IW CM when delivering events
 * to the client.
 *
 * @cm_id: The IW CM identifier associated with the event.
 * @event: Pointer to the event structure.
 */
typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
			     struct iw_cm_event *event);

/**
 * iw_event_handler - Function called by the provider when delivering provider
 * events to the IW CM.  Returns either 0 indicating the event was processed
 * or -errno if the event could not be processed.
 *
 * @cm_id: The IW CM identifier associated with the event.
 * @event: Pointer to the event structure.
 */
typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
				 struct iw_cm_event *event);

struct iw_cm_id {
	iw_cm_handler		cm_handler;      /* client callback function */
	void		        *context;	 /* client cb context */
	struct ib_device	*device;
	struct sockaddr_in      local_addr;
	struct sockaddr_in	remote_addr;
	void			*provider_data;	 /* provider private data */
	iw_event_handler        event_handler;   /* cb for provider
						    events */
	/* Used by provider to add and remove refs on IW cm_id */
	void (*add_ref)(struct iw_cm_id *);
	void (*rem_ref)(struct iw_cm_id *);
};

struct iw_cm_conn_param {
	const void *private_data;
	u16 private_data_len;
	u32 ord;
	u32 ird;
	u32 qpn;
};

struct iw_cm_verbs {
	void		(*add_ref)(struct ib_qp *qp);

	void		(*rem_ref)(struct ib_qp *qp);

	struct ib_qp *	(*get_qp)(struct ib_device *device,
				  int qpn);

	int		(*connect)(struct iw_cm_id *cm_id,
				   struct iw_cm_conn_param *conn_param);

	int		(*accept)(struct iw_cm_id *cm_id,
				  struct iw_cm_conn_param *conn_param);

	int		(*reject)(struct iw_cm_id *cm_id,
				  const void *pdata, u8 pdata_len);

	int		(*create_listen)(struct iw_cm_id *cm_id,
					 int backlog);

	int		(*destroy_listen)(struct iw_cm_id *cm_id);
};

/**
 * iw_create_cm_id - Create an IW CM identifier.
 *
 * @device: The IB device on which to create the IW CM identier.
 * @event_handler: User callback invoked to report events associated with the
 *   returned IW CM identifier.
 * @context: User specified context associated with the id.
 */
struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
				 iw_cm_handler cm_handler, void *context);

/**
 * iw_destroy_cm_id - Destroy an IW CM identifier.
 *
 * @cm_id: The previously created IW CM identifier to destroy.
 *
 * The client can assume that no events will be delivered for the CM ID after
 * this function returns.
 */
void iw_destroy_cm_id(struct iw_cm_id *cm_id);

/**
 * iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
 *
 * @cm_id: The IW CM idenfier to unbind from the QP.
 * @qp: The QP
 *
 * This is called by the provider when destroying the QP to ensure
 * that any references held by the IWCM are released. It may also
 * be called by the IWCM when destroying a CM_ID to that any
 * references held by the provider are released.
 */
void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);

/**
 * iw_cm_get_qp - Return the ib_qp associated with a QPN
 *
 * @ib_device: The IB device
 * @qpn: The queue pair number
 */
struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);

/**
 * iw_cm_listen - Listen for incoming connection requests on the
 * specified IW CM id.
 *
 * @cm_id: The IW CM identifier.
 * @backlog: The maximum number of outstanding un-accepted inbound listen
 *   requests to queue.
 *
 * The source address and port number are specified in the IW CM identifier
 * structure.
 */
int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);

/**
 * iw_cm_accept - Called to accept an incoming connect request.
 *
 * @cm_id: The IW CM identifier associated with the connection request.
 * @iw_param: Pointer to a structure containing connection establishment
 *   parameters.
 *
 * The specified cm_id will have been provided in the event data for a
 * CONNECT_REQUEST event. Subsequent events related to this connection will be
 * delivered to the specified IW CM identifier prior and may occur prior to
 * the return of this function. If this function returns a non-zero value, the
 * client can assume that no events will be delivered to the specified IW CM
 * identifier.
 */
int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);

/**
 * iw_cm_reject - Reject an incoming connection request.
 *
 * @cm_id: Connection identifier associated with the request.
 * @private_daa: Pointer to data to deliver to the remote peer as part of the
 *   reject message.
 * @private_data_len: The number of bytes in the private_data parameter.
 *
 * The client can assume that no events will be delivered to the specified IW
 * CM identifier following the return of this function. The private_data
 * buffer is available for reuse when this function returns.
 */
int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
		 u8 private_data_len);

/**
 * iw_cm_connect - Called to request a connection to a remote peer.
 *
 * @cm_id: The IW CM identifier for the connection.
 * @iw_param: Pointer to a structure containing connection  establishment
 *   parameters.
 *
 * Events may be delivered to the specified IW CM identifier prior to the
 * return of this function. If this function returns a non-zero value, the
 * client can assume that no events will be delivered to the specified IW CM
 * identifier.
 */
int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);

/**
 * iw_cm_disconnect - Close the specified connection.
 *
 * @cm_id: The IW CM identifier to close.
 * @abrupt: If 0, the connection will be closed gracefully, otherwise, the
 *   connection will be reset.
 *
 * The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
 * delivered.
 */
int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);

/**
 * iw_cm_init_qp_attr - Called to initialize the attributes of the QP
 * associated with a IW CM identifier.
 *
 * @cm_id: The IW CM identifier associated with the QP
 * @qp_attr: Pointer to the QP attributes structure.
 * @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
 *   valid.
 */
int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
		       int *qp_attr_mask);

#endif /* IW_CM_H */
Commit	Line	Data
922a8e9f TT	1	/*
	2	* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
	3	* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33	#ifndef IW_CM_H
	34	#define IW_CM_H
	35
	36	#include <linux/in.h>
	37	#include <rdma/ib_cm.h>
	38
	39	struct iw_cm_id;
	40
	41	enum iw_cm_event_type {
	42	IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
	43	IW_CM_EVENT_CONNECT_REPLY, /* reply from active connect request */
	44	IW_CM_EVENT_ESTABLISHED, /* passive side accept successful */
	45	IW_CM_EVENT_DISCONNECT, /* orderly shutdown */
	46	IW_CM_EVENT_CLOSE /* close complete */
	47	};
	48
922a8e9f TT	49	struct iw_cm_event {
922a8e9f TT	50	enum iw_cm_event_type event;
d0c49bf3	51	int status;
922a8e9f TT	52	struct sockaddr_in local_addr;
	53	struct sockaddr_in remote_addr;
	54	void *private_data;
	55	u8 private_data_len;
4deccd6d	56	void *provider_data;
922a8e9f TT	57	};
	58
	59	/**
	60	* iw_cm_handler - Function to be called by the IW CM when delivering events
	61	* to the client.
	62	*
	63	* @cm_id: The IW CM identifier associated with the event.
	64	* @event: Pointer to the event structure.
	65	*/
	66	typedef int (iw_cm_handler)(struct iw_cm_id cm_id,
	67	struct iw_cm_event *event);
	68
	69	/**
	70	* iw_event_handler - Function called by the provider when delivering provider
	71	* events to the IW CM. Returns either 0 indicating the event was processed
	72	* or -errno if the event could not be processed.
	73	*
	74	* @cm_id: The IW CM identifier associated with the event.
	75	* @event: Pointer to the event structure.
	76	*/
	77	typedef int (iw_event_handler)(struct iw_cm_id cm_id,
	78	struct iw_cm_event *event);
	79
	80	struct iw_cm_id {
	81	iw_cm_handler cm_handler; /* client callback function */
	82	void context; / client cb context */
	83	struct ib_device *device;
	84	struct sockaddr_in local_addr;
	85	struct sockaddr_in remote_addr;
	86	void provider_data; / provider private data */
	87	iw_event_handler event_handler; /* cb for provider
	88	events */
	89	/* Used by provider to add and remove refs on IW cm_id */
	90	void (add_ref)(struct iw_cm_id );
	91	void (rem_ref)(struct iw_cm_id );
	92	};
	93
	94	struct iw_cm_conn_param {
	95	const void *private_data;
	96	u16 private_data_len;
	97	u32 ord;
	98	u32 ird;
	99	u32 qpn;
	100	};
	101
	102	struct iw_cm_verbs {
	103	void (add_ref)(struct ib_qp qp);
	104
	105	void (rem_ref)(struct ib_qp qp);
	106
	107	struct ib_qp * (get_qp)(struct ib_device device,
	108	int qpn);
	109
	110	int (connect)(struct iw_cm_id cm_id,
	111	struct iw_cm_conn_param *conn_param);
	112
	113	int (accept)(struct iw_cm_id cm_id,
	114	struct iw_cm_conn_param *conn_param);
	115
	116	int (reject)(struct iw_cm_id cm_id,
	117	const void *pdata, u8 pdata_len);
	118
	119	int (create_listen)(struct iw_cm_id cm_id,
	120	int backlog);
121
122	int (destroy_listen)(struct iw_cm_id cm_id);
123	};
124
125	/**
126	* iw_create_cm_id - Create an IW CM identifier.
127	*
128	* @device: The IB device on which to create the IW CM identier.
129	* @event_handler: User callback invoked to report events associated with the
130	* returned IW CM identifier.
131	* @context: User specified context associated with the id.
132	*/
133	struct iw_cm_id iw_create_cm_id(struct ib_device device,
134	iw_cm_handler cm_handler, void *context);
135
136	/**
137	* iw_destroy_cm_id - Destroy an IW CM identifier.
138	*
139	* @cm_id: The previously created IW CM identifier to destroy.
140	*
141	* The client can assume that no events will be delivered for the CM ID after
142	* this function returns.
143	*/
144	void iw_destroy_cm_id(struct iw_cm_id *cm_id);
145
146	/**
147	* iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
148	*
149	* @cm_id: The IW CM idenfier to unbind from the QP.
150	* @qp: The QP
151	*
152	* This is called by the provider when destroying the QP to ensure
153	* that any references held by the IWCM are released. It may also
154	* be called by the IWCM when destroying a CM_ID to that any
155	* references held by the provider are released.
156	*/
157	void iw_cm_unbind_qp(struct iw_cm_id cm_id, struct ib_qp qp);
158
159	/**
160	* iw_cm_get_qp - Return the ib_qp associated with a QPN
161	*
162	* @ib_device: The IB device
163	* @qpn: The queue pair number
164	*/
165	struct ib_qp iw_cm_get_qp(struct ib_device device, int qpn);
166
167	/**
168	* iw_cm_listen - Listen for incoming connection requests on the
169	* specified IW CM id.
170	*
171	* @cm_id: The IW CM identifier.
172	* @backlog: The maximum number of outstanding un-accepted inbound listen
173	* requests to queue.
174	*
175	* The source address and port number are specified in the IW CM identifier
176	* structure.
177	*/
178	int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
179
180	/**
181	* iw_cm_accept - Called to accept an incoming connect request.
182	*
183	* @cm_id: The IW CM identifier associated with the connection request.
184	* @iw_param: Pointer to a structure containing connection establishment
185	* parameters.
186	*
187	* The specified cm_id will have been provided in the event data for a
188	* CONNECT_REQUEST event. Subsequent events related to this connection will be
189	* delivered to the specified IW CM identifier prior and may occur prior to
190	* the return of this function. If this function returns a non-zero value, the
191	* client can assume that no events will be delivered to the specified IW CM
192	* identifier.
193	*/
194	int iw_cm_accept(struct iw_cm_id cm_id, struct iw_cm_conn_param iw_param);
195
196	/**
197	* iw_cm_reject - Reject an incoming connection request.
198	*
199	* @cm_id: Connection identifier associated with the request.
200	* @private_daa: Pointer to data to deliver to the remote peer as part of the
201	* reject message.
202	* @private_data_len: The number of bytes in the private_data parameter.
203	*
204	* The client can assume that no events will be delivered to the specified IW
205	* CM identifier following the return of this function. The private_data
206	* buffer is available for reuse when this function returns.
207	*/
208	int iw_cm_reject(struct iw_cm_id cm_id, const void private_data,
209	u8 private_data_len);
210
211	/**
212	* iw_cm_connect - Called to request a connection to a remote peer.
213	*
214	* @cm_id: The IW CM identifier for the connection.
215	* @iw_param: Pointer to a structure containing connection establishment
216	* parameters.
217	*
218	* Events may be delivered to the specified IW CM identifier prior to the
219	* return of this function. If this function returns a non-zero value, the
220	* client can assume that no events will be delivered to the specified IW CM
221	* identifier.
222	*/
223	int iw_cm_connect(struct iw_cm_id cm_id, struct iw_cm_conn_param iw_param);
224
225	/**
226	* iw_cm_disconnect - Close the specified connection.
227	*
228	* @cm_id: The IW CM identifier to close.
229	* @abrupt: If 0, the connection will be closed gracefully, otherwise, the
230	* connection will be reset.
231	*
232	* The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
233	* delivered.
234	*/
235	int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
236
237	/**
238	* iw_cm_init_qp_attr - Called to initialize the attributes of the QP
239	* associated with a IW CM identifier.
240	*
241	* @cm_id: The IW CM identifier associated with the QP
242	* @qp_attr: Pointer to the QP attributes structure.
243	* @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
244	* valid.
245	*/
246	int iw_cm_init_qp_attr(struct iw_cm_id cm_id, struct ib_qp_attr qp_attr,
247	int *qp_attr_mask);
248
249	#endif /* IW_CM_H */