include/rdma/iw_cm.h

   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 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 */
  56 };
  57
  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;
  66 };
  67
  68 /**
  69  * iw_cm_handler - Function to be called by the IW CM when delivering events
  70  * to the client.
  71  *
  72  * @cm_id: The IW CM identifier associated with the event.
  73  * @event: Pointer to the event structure.
  74  */
  75 typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
  76                              struct iw_cm_event *event);
  77
  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.
  82  *
  83  * @cm_id: The IW CM identifier associated with the event.
  84  * @event: Pointer to the event structure.
  85  */
  86 typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
  87                                  struct iw_cm_event *event);
  88
  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 *);
 101 };
 102
 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;
 109 };
 110
 111 struct iw_cm_verbs {
 112         void            (*add_ref)(struct ib_qp *qp);
 113
 114         void            (*rem_ref)(struct ib_qp *qp);
 115
 116         struct ib_qp *  (*get_qp)(struct ib_device *device,
 117                                   int qpn);
 118
 119         int             (*connect)(struct iw_cm_id *cm_id,
 120                                    struct iw_cm_conn_param *conn_param);
 121
 122         int             (*accept)(struct iw_cm_id *cm_id,
 123                                   struct iw_cm_conn_param *conn_param);
 124
 125         int             (*reject)(struct iw_cm_id *cm_id,
 126                                   const void *pdata, u8 pdata_len);
 127
 128         int             (*create_listen)(struct iw_cm_id *cm_id,
 129                                          int backlog);
 130
 131         int             (*destroy_listen)(struct iw_cm_id *cm_id);
 132 };
 133
 134 /**
 135  * iw_create_cm_id - Create an IW CM identifier.
 136  *
 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.
 141  */
 142 struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
 143                                  iw_cm_handler cm_handler, void *context);
 144
 145 /**
 146  * iw_destroy_cm_id - Destroy an IW CM identifier.
 147  *
 148  * @cm_id: The previously created IW CM identifier to destroy.
 149  *
 150  * The client can assume that no events will be delivered for the CM ID after
 151  * this function returns.
 152  */
 153 void iw_destroy_cm_id(struct iw_cm_id *cm_id);
 154
 155 /**
 156  * iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
 157  *
 158  * @cm_id: The IW CM idenfier to unbind from the QP.
 159  * @qp: The QP
 160  *
 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.
 165  */
 166 void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
 167
 168 /**
 169  * iw_cm_get_qp - Return the ib_qp associated with a QPN
 170  *
 171  * @ib_device: The IB device
 172  * @qpn: The queue pair number
 173  */
 174 struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
 175
 176 /**
 177  * iw_cm_listen - Listen for incoming connection requests on the
 178  * specified IW CM id.
 179  *
 180  * @cm_id: The IW CM identifier.
 181  * @backlog: The maximum number of outstanding un-accepted inbound listen
 182  *   requests to queue.
 183  *
 184  * The source address and port number are specified in the IW CM identifier
 185  * structure.
 186  */
 187 int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
 188
 189 /**
 190  * iw_cm_accept - Called to accept an incoming connect request.
 191  *
 192  * @cm_id: The IW CM identifier associated with the connection request.
 193  * @iw_param: Pointer to a structure containing connection establishment
 194  *   parameters.
 195  *
 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.
 202  */
 203 int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
 204
 205 /**
 206  * iw_cm_reject - Reject an incoming connection request.
 207  *
 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.
 212  *
 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.
 216  */
 217 int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
 218                  u8 private_data_len);
 219
 220 /**
 221  * iw_cm_connect - Called to request a connection to a remote peer.
 222  *
 223  * @cm_id: The IW CM identifier for the connection.
 224  * @iw_param: Pointer to a structure containing connection  establishment
 225  *   parameters.
 226  *
 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.
 231  */
 232 int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
 233
 234 /**
 235  * iw_cm_disconnect - Close the specified connection.
 236  *
 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.
 240  *
 241  * The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
 242  * delivered.
 243  */
 244 int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
 245
 246 /**
 247  * iw_cm_init_qp_attr - Called to initialize the attributes of the QP
 248  * associated with a IW CM identifier.
 249  *
 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.
 254  */
 255 int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
 256                        int *qp_attr_mask);
 257
 258 #endif /* IW_CM_H */