ceph/src/dpdk/lib/librte_power/guest_channel.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #ifndef _GUEST_CHANNEL_H
  34 #define _GUEST_CHANNEL_H
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #include <channel_commands.h>
  41
  42 /**
  43  * Connect to the Virtio-Serial VM end-point located in path. It is
  44  * thread safe for unique lcore_ids. This function must be only called once from
  45  * each lcore.
  46  *
  47  * @param path
  48  *  The path to the serial device on the filesystem
  49  * @param lcore_id
  50  *  lcore_id.
  51  *
  52  * @return
  53  *  - 0 on success.
  54  *  - Negative on error.
  55  */
  56 int guest_channel_host_connect(const char *path, unsigned lcore_id);
  57
  58 /**
  59  * Disconnect from an already connected Virtio-Serial Endpoint.
  60  *
  61  *
  62  * @param lcore_id
  63  *  lcore_id.
  64  *
  65  */
  66 void guest_channel_host_disconnect(unsigned lcore_id);
  67
  68 /**
  69  * Send a message contained in pkt over the Virtio-Serial to the host endpoint.
  70  *
  71  * @param pkt
  72  *  Pointer to a populated struct guest_agent_pkt
  73  *
  74  * @param lcore_id
  75  *  lcore_id.
  76  *
  77  * @return
  78  *  - 0 on success.
  79  *  - Negative on channel not connected.
  80  *  - errno on write to channel error.
  81  */
  82 int guest_channel_send_msg(struct channel_packet *pkt, unsigned lcore_id);
  83
  84
  85 #ifdef __cplusplus
  86 }
  87 #endif
  88
  89 #endif