ceph/src/dpdk/lib/librte_vhost/vhost_user.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,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  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
  34 #ifndef _VHOST_NET_USER_H
  35 #define _VHOST_NET_USER_H
  36
  37 #include <stdint.h>
  38 #include <linux/vhost.h>
  39
  40 #include "rte_virtio_net.h"
  41
  42 /* refer to hw/virtio/vhost-user.c */
  43
  44 #define VHOST_MEMORY_MAX_NREGIONS 8
  45
  46 #define VHOST_USER_PROTOCOL_F_MQ        0
  47 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  48 #define VHOST_USER_PROTOCOL_F_RARP      2
  49
  50 #define VHOST_USER_PROTOCOL_FEATURES    ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
  51                                          (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |\
  52                                          (1ULL << VHOST_USER_PROTOCOL_F_RARP))
  53
  54 typedef enum VhostUserRequest {
  55         VHOST_USER_NONE = 0,
  56         VHOST_USER_GET_FEATURES = 1,
  57         VHOST_USER_SET_FEATURES = 2,
  58         VHOST_USER_SET_OWNER = 3,
  59         VHOST_USER_RESET_OWNER = 4,
  60         VHOST_USER_SET_MEM_TABLE = 5,
  61         VHOST_USER_SET_LOG_BASE = 6,
  62         VHOST_USER_SET_LOG_FD = 7,
  63         VHOST_USER_SET_VRING_NUM = 8,
  64         VHOST_USER_SET_VRING_ADDR = 9,
  65         VHOST_USER_SET_VRING_BASE = 10,
  66         VHOST_USER_GET_VRING_BASE = 11,
  67         VHOST_USER_SET_VRING_KICK = 12,
  68         VHOST_USER_SET_VRING_CALL = 13,
  69         VHOST_USER_SET_VRING_ERR = 14,
  70         VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  71         VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  72         VHOST_USER_GET_QUEUE_NUM = 17,
  73         VHOST_USER_SET_VRING_ENABLE = 18,
  74         VHOST_USER_SEND_RARP = 19,
  75         VHOST_USER_MAX
  76 } VhostUserRequest;
  77
  78 typedef struct VhostUserMemoryRegion {
  79         uint64_t guest_phys_addr;
  80         uint64_t memory_size;
  81         uint64_t userspace_addr;
  82         uint64_t mmap_offset;
  83 } VhostUserMemoryRegion;
  84
  85 typedef struct VhostUserMemory {
  86         uint32_t nregions;
  87         uint32_t padding;
  88         VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  89 } VhostUserMemory;
  90
  91 typedef struct VhostUserLog {
  92         uint64_t mmap_size;
  93         uint64_t mmap_offset;
  94 } VhostUserLog;
  95
  96 typedef struct VhostUserMsg {
  97         VhostUserRequest request;
  98
  99 #define VHOST_USER_VERSION_MASK     0x3
 100 #define VHOST_USER_REPLY_MASK       (0x1 << 2)
 101         uint32_t flags;
 102         uint32_t size; /* the following payload size */
 103         union {
 104 #define VHOST_USER_VRING_IDX_MASK   0xff
 105 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 106                 uint64_t u64;
 107                 struct vhost_vring_state state;
 108                 struct vhost_vring_addr addr;
 109                 VhostUserMemory memory;
 110                 VhostUserLog    log;
 111         } payload;
 112         int fds[VHOST_MEMORY_MAX_NREGIONS];
 113 } __attribute((packed)) VhostUserMsg;
 114
 115 #define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64)
 116
 117 /* The version of the protocol we support */
 118 #define VHOST_USER_VERSION    0x1
 119
 120
 121 /* vhost_user.c */
 122 int vhost_user_msg_handler(int vid, int fd);
 123
 124 /* socket.c */
 125 int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num);
 126 int send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num);
 127
 128 #endif