fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / rdma / iw_cm.h
blobaeefa9b740dc88dda55d327d79a894bc680bcf6d
1 /*
2 * Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
3 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
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.
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.
33 #ifndef IW_CM_H
34 #define IW_CM_H
36 #include <linux/in.h>
37 #include <rdma/ib_cm.h>
39 struct iw_cm_id;
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 */
49 enum iw_cm_event_status {
50 IW_CM_EVENT_STATUS_OK = 0, /* request successful */
51 IW_CM_EVENT_STATUS_ACCEPTED = 0, /* connect request accepted */
52 IW_CM_EVENT_STATUS_REJECTED, /* connect request rejected */
53 IW_CM_EVENT_STATUS_TIMEOUT, /* the operation timed out */
54 IW_CM_EVENT_STATUS_RESET, /* reset from remote peer */
55 IW_CM_EVENT_STATUS_EINVAL, /* asynchronous failure for bad parm */
58 struct iw_cm_event {
59 enum iw_cm_event_type event;
60 enum iw_cm_event_status status;
61 struct sockaddr_in local_addr;
62 struct sockaddr_in remote_addr;
63 void *private_data;
64 u8 private_data_len;
65 void* provider_data;
68 /**
69 * iw_cm_handler - Function to be called by the IW CM when delivering events
70 * to the client.
72 * @cm_id: The IW CM identifier associated with the event.
73 * @event: Pointer to the event structure.
75 typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
76 struct iw_cm_event *event);
78 /**
79 * iw_event_handler - Function called by the provider when delivering provider
80 * events to the IW CM. Returns either 0 indicating the event was processed
81 * or -errno if the event could not be processed.
83 * @cm_id: The IW CM identifier associated with the event.
84 * @event: Pointer to the event structure.
86 typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
87 struct iw_cm_event *event);
89 struct iw_cm_id {
90 iw_cm_handler cm_handler; /* client callback function */
91 void *context; /* client cb context */
92 struct ib_device *device;
93 struct sockaddr_in local_addr;
94 struct sockaddr_in remote_addr;
95 void *provider_data; /* provider private data */
96 iw_event_handler event_handler; /* cb for provider
97 events */
98 /* Used by provider to add and remove refs on IW cm_id */
99 void (*add_ref)(struct iw_cm_id *);
100 void (*rem_ref)(struct iw_cm_id *);
103 struct iw_cm_conn_param {
104 const void *private_data;
105 u16 private_data_len;
106 u32 ord;
107 u32 ird;
108 u32 qpn;
111 struct iw_cm_verbs {
112 void (*add_ref)(struct ib_qp *qp);
114 void (*rem_ref)(struct ib_qp *qp);
116 struct ib_qp * (*get_qp)(struct ib_device *device,
117 int qpn);
119 int (*connect)(struct iw_cm_id *cm_id,
120 struct iw_cm_conn_param *conn_param);
122 int (*accept)(struct iw_cm_id *cm_id,
123 struct iw_cm_conn_param *conn_param);
125 int (*reject)(struct iw_cm_id *cm_id,
126 const void *pdata, u8 pdata_len);
128 int (*create_listen)(struct iw_cm_id *cm_id,
129 int backlog);
131 int (*destroy_listen)(struct iw_cm_id *cm_id);
135 * iw_create_cm_id - Create an IW CM identifier.
137 * @device: The IB device on which to create the IW CM identier.
138 * @event_handler: User callback invoked to report events associated with the
139 * returned IW CM identifier.
140 * @context: User specified context associated with the id.
142 struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
143 iw_cm_handler cm_handler, void *context);
146 * iw_destroy_cm_id - Destroy an IW CM identifier.
148 * @cm_id: The previously created IW CM identifier to destroy.
150 * The client can assume that no events will be delivered for the CM ID after
151 * this function returns.
153 void iw_destroy_cm_id(struct iw_cm_id *cm_id);
156 * iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
158 * @cm_id: The IW CM idenfier to unbind from the QP.
159 * @qp: The QP
161 * This is called by the provider when destroying the QP to ensure
162 * that any references held by the IWCM are released. It may also
163 * be called by the IWCM when destroying a CM_ID to that any
164 * references held by the provider are released.
166 void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
169 * iw_cm_get_qp - Return the ib_qp associated with a QPN
171 * @ib_device: The IB device
172 * @qpn: The queue pair number
174 struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
177 * iw_cm_listen - Listen for incoming connection requests on the
178 * specified IW CM id.
180 * @cm_id: The IW CM identifier.
181 * @backlog: The maximum number of outstanding un-accepted inbound listen
182 * requests to queue.
184 * The source address and port number are specified in the IW CM identifier
185 * structure.
187 int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
190 * iw_cm_accept - Called to accept an incoming connect request.
192 * @cm_id: The IW CM identifier associated with the connection request.
193 * @iw_param: Pointer to a structure containing connection establishment
194 * parameters.
196 * The specified cm_id will have been provided in the event data for a
197 * CONNECT_REQUEST event. Subsequent events related to this connection will be
198 * delivered to the specified IW CM identifier prior and may occur prior to
199 * the return of this function. If this function returns a non-zero value, the
200 * client can assume that no events will be delivered to the specified IW CM
201 * identifier.
203 int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
206 * iw_cm_reject - Reject an incoming connection request.
208 * @cm_id: Connection identifier associated with the request.
209 * @private_daa: Pointer to data to deliver to the remote peer as part of the
210 * reject message.
211 * @private_data_len: The number of bytes in the private_data parameter.
213 * The client can assume that no events will be delivered to the specified IW
214 * CM identifier following the return of this function. The private_data
215 * buffer is available for reuse when this function returns.
217 int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
218 u8 private_data_len);
221 * iw_cm_connect - Called to request a connection to a remote peer.
223 * @cm_id: The IW CM identifier for the connection.
224 * @iw_param: Pointer to a structure containing connection establishment
225 * parameters.
227 * Events may be delivered to the specified IW CM identifier prior to the
228 * return of this function. If this function returns a non-zero value, the
229 * client can assume that no events will be delivered to the specified IW CM
230 * identifier.
232 int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
235 * iw_cm_disconnect - Close the specified connection.
237 * @cm_id: The IW CM identifier to close.
238 * @abrupt: If 0, the connection will be closed gracefully, otherwise, the
239 * connection will be reset.
241 * The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
242 * delivered.
244 int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
247 * iw_cm_init_qp_attr - Called to initialize the attributes of the QP
248 * associated with a IW CM identifier.
250 * @cm_id: The IW CM identifier associated with the QP
251 * @qp_attr: Pointer to the QP attributes structure.
252 * @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
253 * valid.
255 int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
256 int *qp_attr_mask);
258 #endif /* IW_CM_H */