lib/vhost/vhost_user.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2018 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                                          (1ULL << VHOST_USER_PROTOCOL_F_CRYPTO_SESSION) | \
  24                                          (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) | \
  25                                          (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) | \
  26                                          (1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT) | \
  27                                          (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
  28
  29 typedef enum VhostUserRequest {
  30         VHOST_USER_NONE = 0,
  31         VHOST_USER_GET_FEATURES = 1,
  32         VHOST_USER_SET_FEATURES = 2,
  33         VHOST_USER_SET_OWNER = 3,
  34         VHOST_USER_RESET_OWNER = 4,
  35         VHOST_USER_SET_MEM_TABLE = 5,
  36         VHOST_USER_SET_LOG_BASE = 6,
  37         VHOST_USER_SET_LOG_FD = 7,
  38         VHOST_USER_SET_VRING_NUM = 8,
  39         VHOST_USER_SET_VRING_ADDR = 9,
  40         VHOST_USER_SET_VRING_BASE = 10,
  41         VHOST_USER_GET_VRING_BASE = 11,
  42         VHOST_USER_SET_VRING_KICK = 12,
  43         VHOST_USER_SET_VRING_CALL = 13,
  44         VHOST_USER_SET_VRING_ERR = 14,
  45         VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  46         VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  47         VHOST_USER_GET_QUEUE_NUM = 17,
  48         VHOST_USER_SET_VRING_ENABLE = 18,
  49         VHOST_USER_SEND_RARP = 19,
  50         VHOST_USER_NET_SET_MTU = 20,
  51         VHOST_USER_SET_SLAVE_REQ_FD = 21,
  52         VHOST_USER_IOTLB_MSG = 22,
  53         VHOST_USER_GET_CONFIG = 24,
  54         VHOST_USER_SET_CONFIG = 25,
  55         VHOST_USER_CRYPTO_CREATE_SESS = 26,
  56         VHOST_USER_CRYPTO_CLOSE_SESS = 27,
  57         VHOST_USER_POSTCOPY_ADVISE = 28,
  58         VHOST_USER_POSTCOPY_LISTEN = 29,
  59         VHOST_USER_POSTCOPY_END = 30,
  60         VHOST_USER_GET_INFLIGHT_FD = 31,
  61         VHOST_USER_SET_INFLIGHT_FD = 32,
  62         VHOST_USER_SET_STATUS = 39,
  63         VHOST_USER_GET_STATUS = 40,
  64 } VhostUserRequest;
  65
  66 typedef enum VhostUserSlaveRequest {
  67         VHOST_USER_SLAVE_NONE = 0,
  68         VHOST_USER_SLAVE_IOTLB_MSG = 1,
  69         VHOST_USER_SLAVE_CONFIG_CHANGE_MSG = 2,
  70         VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG = 3,
  71 } VhostUserSlaveRequest;
  72
  73 typedef struct VhostUserMemoryRegion {
  74         uint64_t guest_phys_addr;
  75         uint64_t memory_size;
  76         uint64_t userspace_addr;
  77         uint64_t mmap_offset;
  78 } VhostUserMemoryRegion;
  79
  80 typedef struct VhostUserMemory {
  81         uint32_t nregions;
  82         uint32_t padding;
  83         VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  84 } VhostUserMemory;
  85
  86 typedef struct VhostUserLog {
  87         uint64_t mmap_size;
  88         uint64_t mmap_offset;
  89 } VhostUserLog;
  90
  91 /* Comply with Cryptodev-Linux */
  92 #define VHOST_USER_CRYPTO_MAX_HMAC_KEY_LENGTH   512
  93 #define VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH 64
  94
  95 /* Same structure as vhost-user backend session info */
  96 typedef struct VhostUserCryptoSessionParam {
  97         int64_t session_id;
  98         uint32_t op_code;
  99         uint32_t cipher_algo;
 100         uint32_t cipher_key_len;
 101         uint32_t hash_algo;
 102         uint32_t digest_len;
 103         uint32_t auth_key_len;
 104         uint32_t aad_len;
 105         uint8_t op_type;
 106         uint8_t dir;
 107         uint8_t hash_mode;
 108         uint8_t chaining_dir;
 109         uint8_t *ciphe_key;
 110         uint8_t *auth_key;
 111         uint8_t cipher_key_buf[VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH];
 112         uint8_t auth_key_buf[VHOST_USER_CRYPTO_MAX_HMAC_KEY_LENGTH];
 113 } VhostUserCryptoSessionParam;
 114
 115 typedef struct VhostUserVringArea {
 116         uint64_t u64;
 117         uint64_t size;
 118         uint64_t offset;
 119 } VhostUserVringArea;
 120
 121 typedef struct VhostUserInflight {
 122         uint64_t mmap_size;
 123         uint64_t mmap_offset;
 124         uint16_t num_queues;
 125         uint16_t queue_size;
 126 } VhostUserInflight;
 127
 128 #define VHOST_USER_MAX_CONFIG_SIZE              256
 129
 130 /** Get/set config msg payload */
 131 struct vhost_user_config {
 132         uint32_t offset;
 133         uint32_t size;
 134         uint32_t flags;
 135         uint8_t region[VHOST_USER_MAX_CONFIG_SIZE];
 136 };
 137
 138 typedef struct VhostUserMsg {
 139         union {
 140                 uint32_t master; /* a VhostUserRequest value */
 141                 uint32_t slave;  /* a VhostUserSlaveRequest value*/
 142         } request;
 143
 144 #define VHOST_USER_VERSION_MASK     0x3
 145 #define VHOST_USER_REPLY_MASK       (0x1 << 2)
 146 #define VHOST_USER_NEED_REPLY           (0x1 << 3)
 147         uint32_t flags;
 148         uint32_t size; /* the following payload size */
 149         union {
 150 #define VHOST_USER_VRING_IDX_MASK   0xff
 151 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 152                 uint64_t u64;
 153                 struct vhost_vring_state state;
 154                 struct vhost_vring_addr addr;
 155                 VhostUserMemory memory;
 156                 VhostUserLog    log;
 157                 struct vhost_iotlb_msg iotlb;
 158                 VhostUserCryptoSessionParam crypto_session;
 159                 VhostUserVringArea area;
 160                 VhostUserInflight inflight;
 161                 struct vhost_user_config cfg;
 162         } payload;
 163         /* Nothing should be added after the payload */
 164 } __rte_packed VhostUserMsg;
 165
 166 /* Note: this structure and VhostUserMsg can't be changed carelessly as
 167  * external message handlers rely on them.
 168  */
 169 struct __rte_packed vhu_msg_context {
 170         VhostUserMsg msg;
 171         int fds[VHOST_MEMORY_MAX_NREGIONS];
 172         int fd_num;
 173 };
 174
 175 #define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64)
 176
 177 /* The version of the protocol we support */
 178 #define VHOST_USER_VERSION    0x1
 179
 180
 181 /* vhost_user.c */
 182 int vhost_user_msg_handler(int vid, int fd);
 183 int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm);
 184
 185 /* socket.c */
 186 int read_fd_message(char *ifname, int sockfd, char *buf, int buflen, int *fds, int max_fds,
 187                 int *fd_num);
 188 int send_fd_message(char *ifname, int sockfd, char *buf, int buflen, int *fds, int fd_num);
 189
 190 #endif