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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 | |
49 | struct iw_cm_event { |
50 | enum iw_cm_event_type event; |
51 | int status; |
52 | struct sockaddr_in local_addr; |
53 | struct sockaddr_in remote_addr; |
54 | void *private_data; |
55 | u8 private_data_len; |
56 | void *provider_data; |
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 */ |
250 |
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