drivers/infiniband/core/ucm.h

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  * $Id: ucm.h 2208 2005-04-22 23:24:31Z libor $
  33  */
  34
  35 #ifndef UCM_H
  36 #define UCM_H
  37
  38 #include <linux/fs.h>
  39 #include <linux/device.h>
  40 #include <linux/cdev.h>
  41 #include <linux/idr.h>
  42
  43 #include <rdma/ib_cm.h>
  44 #include <rdma/ib_user_cm.h>
  45
  46 #define IB_UCM_CM_ID_INVALID 0xffffffff
  47
  48 struct ib_ucm_file {
  49         struct semaphore mutex;
  50         struct file *filp;
  51
  52         struct list_head  ctxs;   /* list of active connections */
  53         struct list_head  events; /* list of pending events */
  54         wait_queue_head_t poll_wait;
  55 };
  56
  57 struct ib_ucm_context {
  58         int                 id;
  59         wait_queue_head_t   wait;
  60         atomic_t            ref;
  61
  62         struct ib_ucm_file *file;
  63         struct ib_cm_id    *cm_id;
  64
  65         struct list_head    events;    /* list of pending events. */
  66         struct list_head    file_list; /* member in file ctx list */
  67 };
  68
  69 struct ib_ucm_event {
  70         struct ib_ucm_context *ctx;
  71         struct list_head file_list; /* member in file event list */
  72         struct list_head ctx_list;  /* member in ctx event list */
  73
  74         struct ib_ucm_event_resp resp;
  75         void *data;
  76         void *info;
  77         int data_len;
  78         int info_len;
  79         /*
  80          * new connection identifiers needs to be saved until
  81          * userspace can get a handle on them.
  82          */
  83         struct ib_cm_id *cm_id;
  84 };
  85
  86 #endif /* UCM_H */