ceph/src/spdk/dpdk/drivers/net/virtio/virtio_user/vhost.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #ifndef _VHOST_NET_USER_H
   6 #define _VHOST_NET_USER_H
   7
   8 #include <stdint.h>
   9 #include <linux/types.h>
  10 #include <linux/ioctl.h>
  11
  12 #include "../virtio_pci.h"
  13 #include "../virtio_logs.h"
  14 #include "../virtqueue.h"
  15
  16 struct vhost_vring_state {
  17         unsigned int index;
  18         unsigned int num;
  19 };
  20
  21 struct vhost_vring_file {
  22         unsigned int index;
  23         int fd;
  24 };
  25
  26 struct vhost_vring_addr {
  27         unsigned int index;
  28         /* Option flags. */
  29         unsigned int flags;
  30         /* Flag values: */
  31         /* Whether log address is valid. If set enables logging. */
  32 #define VHOST_VRING_F_LOG 0
  33
  34         /* Start of array of descriptors (virtually contiguous) */
  35         uint64_t desc_user_addr;
  36         /* Used structure address. Must be 32 bit aligned */
  37         uint64_t used_user_addr;
  38         /* Available structure address. Must be 16 bit aligned */
  39         uint64_t avail_user_addr;
  40         /* Logging support. */
  41         /* Log writes to used structure, at offset calculated from specified
  42          * address. Address must be 32 bit aligned.
  43          */
  44         uint64_t log_guest_addr;
  45 };
  46
  47 enum vhost_user_request {
  48         VHOST_USER_NONE = 0,
  49         VHOST_USER_GET_FEATURES = 1,
  50         VHOST_USER_SET_FEATURES = 2,
  51         VHOST_USER_SET_OWNER = 3,
  52         VHOST_USER_RESET_OWNER = 4,
  53         VHOST_USER_SET_MEM_TABLE = 5,
  54         VHOST_USER_SET_LOG_BASE = 6,
  55         VHOST_USER_SET_LOG_FD = 7,
  56         VHOST_USER_SET_VRING_NUM = 8,
  57         VHOST_USER_SET_VRING_ADDR = 9,
  58         VHOST_USER_SET_VRING_BASE = 10,
  59         VHOST_USER_GET_VRING_BASE = 11,
  60         VHOST_USER_SET_VRING_KICK = 12,
  61         VHOST_USER_SET_VRING_CALL = 13,
  62         VHOST_USER_SET_VRING_ERR = 14,
  63         VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  64         VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  65         VHOST_USER_GET_QUEUE_NUM = 17,
  66         VHOST_USER_SET_VRING_ENABLE = 18,
  67         VHOST_USER_MAX
  68 };
  69
  70 const char * const vhost_msg_strings[VHOST_USER_MAX];
  71
  72 struct vhost_memory_region {
  73         uint64_t guest_phys_addr;
  74         uint64_t memory_size; /* bytes */
  75         uint64_t userspace_addr;
  76         uint64_t mmap_offset;
  77 };
  78
  79 struct virtio_user_dev;
  80
  81 struct virtio_user_backend_ops {
  82         int (*setup)(struct virtio_user_dev *dev);
  83         int (*send_request)(struct virtio_user_dev *dev,
  84                             enum vhost_user_request req,
  85                             void *arg);
  86         int (*enable_qp)(struct virtio_user_dev *dev,
  87                          uint16_t pair_idx,
  88                          int enable);
  89 };
  90
  91 struct virtio_user_backend_ops ops_user;
  92 struct virtio_user_backend_ops ops_kernel;
  93
  94 #endif