include/linux/ntb_transport.h

   1 /*
   2  * This file is provided under a dual BSD/GPLv2 license.  When using or
   3  *   redistributing this file, you may do so under either license.
   4  *
   5  *   GPL LICENSE SUMMARY
   6  *
   7  *   Copyright(c) 2012 Intel Corporation. All rights reserved.
   8  *   Copyright (C) 2015 EMC Corporation. All Rights Reserved.
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of version 2 of the GNU General Public License as
  12  *   published by the Free Software Foundation.
  13  *
  14  *   BSD LICENSE
  15  *
  16  *   Copyright(c) 2012 Intel Corporation. All rights reserved.
  17  *   Copyright (C) 2015 EMC Corporation. All Rights Reserved.
  18  *
  19  *   Redistribution and use in source and binary forms, with or without
  20  *   modification, are permitted provided that the following conditions
  21  *   are met:
  22  *
  23  *     * Redistributions of source code must retain the above copyright
  24  *       notice, this list of conditions and the following disclaimer.
  25  *     * Redistributions in binary form must reproduce the above copy
  26  *       notice, this list of conditions and the following disclaimer in
  27  *       the documentation and/or other materials provided with the
  28  *       distribution.
  29  *     * Neither the name of Intel Corporation nor the names of its
  30  *       contributors may be used to endorse or promote products derived
  31  *       from this software without specific prior written permission.
  32  *
  33  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  34  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  35  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  36  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  37  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  38  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  39  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  40  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  41  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  42  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  43  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  44  *
  45  * PCIe NTB Transport Linux driver
  46  *
  47  * Contact Information:
  48  * Jon Mason <jon.mason@intel.com>
  49  */
  50
  51 struct ntb_transport_qp;
  52
  53 struct ntb_transport_client {
  54         struct device_driver driver;
  55         int (*probe)(struct device *client_dev);
  56         void (*remove)(struct device *client_dev);
  57 };
  58
  59 int ntb_transport_register_client(struct ntb_transport_client *drvr);
  60 void ntb_transport_unregister_client(struct ntb_transport_client *drvr);
  61 int ntb_transport_register_client_dev(char *device_name);
  62 void ntb_transport_unregister_client_dev(char *device_name);
  63
  64 struct ntb_queue_handlers {
  65         void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
  66                            void *data, int len);
  67         void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data,
  68                            void *data, int len);
  69         void (*event_handler)(void *data, int status);
  70 };
  71
  72 unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp);
  73 unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp);
  74 struct ntb_transport_qp *
  75 ntb_transport_create_queue(void *data, struct device *client_dev,
  76                            const struct ntb_queue_handlers *handlers);
  77 void ntb_transport_free_queue(struct ntb_transport_qp *qp);
  78 int ntb_transport_rx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
  79                              unsigned int len);
  80 int ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
  81                              unsigned int len);
  82 void *ntb_transport_rx_remove(struct ntb_transport_qp *qp, unsigned int *len);
  83 void ntb_transport_link_up(struct ntb_transport_qp *qp);
  84 void ntb_transport_link_down(struct ntb_transport_qp *qp);
  85 bool ntb_transport_link_query(struct ntb_transport_qp *qp);
  86 unsigned int ntb_transport_tx_free_entry(struct ntb_transport_qp *qp);