lib/librte_vhost/vhost_user.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef _VHOST_NET_USER_H
   6 #define _VHOST_NET_USER_H
   7
   8 #include <stdint.h>
   9 #include <linux/vhost.h>
  10
  11 #include "rte_vhost.h"
  12
  13 /* refer to hw/virtio/vhost-user.c */
  14
  15 #define VHOST_MEMORY_MAX_NREGIONS 8
  16
  17 #define VHOST_USER_PROTOCOL_FEATURES    ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
  18                                          (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |\
  19                                          (1ULL << VHOST_USER_PROTOCOL_F_RARP) | \
  20                                          (1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK) | \
  21                                          (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU) | \
  22                                          (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ))
  23
  24 typedef enum VhostUserRequest {
  25         VHOST_USER_NONE = 0,
  26         VHOST_USER_GET_FEATURES = 1,
  27         VHOST_USER_SET_FEATURES = 2,
  28         VHOST_USER_SET_OWNER = 3,
  29         VHOST_USER_RESET_OWNER = 4,
  30         VHOST_USER_SET_MEM_TABLE = 5,
  31         VHOST_USER_SET_LOG_BASE = 6,
  32         VHOST_USER_SET_LOG_FD = 7,
  33         VHOST_USER_SET_VRING_NUM = 8,
  34         VHOST_USER_SET_VRING_ADDR = 9,
  35         VHOST_USER_SET_VRING_BASE = 10,
  36         VHOST_USER_GET_VRING_BASE = 11,
  37         VHOST_USER_SET_VRING_KICK = 12,
  38         VHOST_USER_SET_VRING_CALL = 13,
  39         VHOST_USER_SET_VRING_ERR = 14,
  40         VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  41         VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  42         VHOST_USER_GET_QUEUE_NUM = 17,
  43         VHOST_USER_SET_VRING_ENABLE = 18,
  44         VHOST_USER_SEND_RARP = 19,
  45         VHOST_USER_NET_SET_MTU = 20,
  46         VHOST_USER_SET_SLAVE_REQ_FD = 21,
  47         VHOST_USER_IOTLB_MSG = 22,
  48         VHOST_USER_MAX
  49 } VhostUserRequest;
  50
  51 typedef enum VhostUserSlaveRequest {
  52         VHOST_USER_SLAVE_NONE = 0,
  53         VHOST_USER_SLAVE_IOTLB_MSG = 1,
  54         VHOST_USER_SLAVE_MAX
  55 } VhostUserSlaveRequest;
  56
  57 typedef struct VhostUserMemoryRegion {
  58         uint64_t guest_phys_addr;
  59         uint64_t memory_size;
  60         uint64_t userspace_addr;
  61         uint64_t mmap_offset;
  62 } VhostUserMemoryRegion;
  63
  64 typedef struct VhostUserMemory {
  65         uint32_t nregions;
  66         uint32_t padding;
  67         VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  68 } VhostUserMemory;
  69
  70 typedef struct VhostUserLog {
  71         uint64_t mmap_size;
  72         uint64_t mmap_offset;
  73 } VhostUserLog;
  74
  75 typedef struct VhostUserMsg {
  76         union {
  77                 uint32_t master; /* a VhostUserRequest value */
  78                 uint32_t slave;  /* a VhostUserSlaveRequest value*/
  79         } request;
  80
  81 #define VHOST_USER_VERSION_MASK     0x3
  82 #define VHOST_USER_REPLY_MASK       (0x1 << 2)
  83 #define VHOST_USER_NEED_REPLY           (0x1 << 3)
  84         uint32_t flags;
  85         uint32_t size; /* the following payload size */
  86         union {
  87 #define VHOST_USER_VRING_IDX_MASK   0xff
  88 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
  89                 uint64_t u64;
  90                 struct vhost_vring_state state;
  91                 struct vhost_vring_addr addr;
  92                 VhostUserMemory memory;
  93                 VhostUserLog    log;
  94                 struct vhost_iotlb_msg iotlb;
  95         } payload;
  96         int fds[VHOST_MEMORY_MAX_NREGIONS];
  97 } __attribute((packed)) VhostUserMsg;
  98
  99 #define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64)
 100
 101 /* The version of the protocol we support */
 102 #define VHOST_USER_VERSION    0x1
 103
 104
 105 /* vhost_user.c */
 106 int vhost_user_msg_handler(int vid, int fd);
 107 int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm);
 108
 109 /* socket.c */
 110 int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num);
 111 int send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num);
 112
 113 #endif