2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __VIRTIO_VHOST_USER_H__
16 #define __VIRTIO_VHOST_USER_H__
17 /* vhost-user data structures */
19 #define VHOST_MEMORY_MAX_NREGIONS 8
20 #define VHOST_USER_MSG_HDR_SZ 12
21 #define VHOST_VRING_MAX_SIZE 32768
22 #define VHOST_VRING_MAX_N 16 //8TX + 8RX
23 #define VHOST_VRING_IDX_RX(qid) (2*qid)
24 #define VHOST_VRING_IDX_TX(qid) (2*qid + 1)
26 #define VIRTQ_DESC_F_NEXT 1
27 #define VIRTQ_DESC_F_INDIRECT 4
28 #define VHOST_USER_REPLY_MASK (0x1 << 2)
30 #define VHOST_USER_PROTOCOL_F_MQ 0
31 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
32 #define VHOST_VRING_F_LOG 0
34 #define VHOST_USER_F_PROTOCOL_FEATURES 30
35 #define VHOST_USER_PROTOCOL_FEATURES ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
36 (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD))
38 /* If multiqueue is provided by host, then we suppport it. */
39 #define VIRTIO_NET_CTRL_MQ 4
40 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
41 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
42 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
44 #define VRING_USED_F_NO_NOTIFY 1
46 #define foreach_virtio_net_feature \
47 _ (VIRTIO_NET_F_MRG_RXBUF, 15) \
48 _ (VIRTIO_NET_F_CTRL_VQ, 17) \
49 _ (VIRTIO_NET_F_GUEST_ANNOUNCE, 21) \
50 _ (VIRTIO_NET_F_MQ, 22) \
51 _ (VHOST_F_LOG_ALL, 26) \
52 _ (VIRTIO_F_ANY_LAYOUT, 27) \
53 _ (VIRTIO_F_INDIRECT_DESC, 28) \
54 _ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
55 _ (VIRTIO_F_VERSION_1, 32)
60 #define _(f,n) FEAT_##f = (n),
61 foreach_virtio_net_feature
63 } virtio_net_feature_t;
65 int vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
66 const char *sock_filename, u8 is_server,
67 u32 * sw_if_index, u64 feature_mask,
68 u8 renumber, u32 custom_dev_instance, u8 * hwaddr);
69 int vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
70 const char *sock_filename, u8 is_server,
71 u32 sw_if_index, u64 feature_mask,
72 u8 renumber, u32 custom_dev_instance);
73 int vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm,
77 typedef struct vhost_user_memory_region
83 } __attribute ((packed)) vhost_user_memory_region_t;
85 typedef struct vhost_user_memory
89 vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
90 } __attribute ((packed)) vhost_user_memory_t;
95 } __attribute ((packed)) vhost_vring_state_t;
100 u64 desc_user_addr, used_user_addr, avail_user_addr, log_guest_addr;
101 } __attribute ((packed)) vhost_vring_addr_t;
103 typedef struct vhost_user_log
107 } __attribute ((packed)) vhost_user_log_t;
109 typedef enum vhost_user_req
112 VHOST_USER_GET_FEATURES = 1,
113 VHOST_USER_SET_FEATURES = 2,
114 VHOST_USER_SET_OWNER = 3,
115 VHOST_USER_RESET_OWNER = 4,
116 VHOST_USER_SET_MEM_TABLE = 5,
117 VHOST_USER_SET_LOG_BASE = 6,
118 VHOST_USER_SET_LOG_FD = 7,
119 VHOST_USER_SET_VRING_NUM = 8,
120 VHOST_USER_SET_VRING_ADDR = 9,
121 VHOST_USER_SET_VRING_BASE = 10,
122 VHOST_USER_GET_VRING_BASE = 11,
123 VHOST_USER_SET_VRING_KICK = 12,
124 VHOST_USER_SET_VRING_CALL = 13,
125 VHOST_USER_SET_VRING_ERR = 14,
126 VHOST_USER_GET_PROTOCOL_FEATURES = 15,
127 VHOST_USER_SET_PROTOCOL_FEATURES = 16,
128 VHOST_USER_GET_QUEUE_NUM = 17,
129 VHOST_USER_SET_VRING_ENABLE = 18,
133 // vring_desc I/O buffer descriptor
136 uint64_t addr; // packet data buffer address
137 uint32_t len; // packet data buffer size
138 uint16_t flags; // (see below)
139 uint16_t next; // optional index next descriptor in chain
140 } __attribute ((packed)) vring_desc_t;
145 volatile uint16_t idx;
146 uint16_t ring[VHOST_VRING_MAX_SIZE];
147 } __attribute ((packed)) vring_avail_t;
153 struct /* vring_used_elem */
157 } ring[VHOST_VRING_MAX_SIZE];
158 } __attribute ((packed)) vring_used_t;
168 } __attribute ((packed)) virtio_net_hdr_t;
171 virtio_net_hdr_t hdr;
173 } __attribute ((packed)) virtio_net_hdr_mrg_rxbuf_t;
175 typedef struct vhost_user_msg {
176 vhost_user_req_t request;
182 vhost_vring_state_t state;
183 vhost_vring_addr_t addr;
184 vhost_user_memory_t memory;
185 vhost_user_log_t log;
187 } __attribute ((packed)) vhost_user_msg_t;
192 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
196 u16 n_since_last_int;
198 vring_avail_t *avail;
204 //Put non-runtime in a different cache line
205 CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
212 } vhost_user_vring_t;
216 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
222 char sock_filename[256];
225 u32 hw_if_index, sw_if_index;
228 //Feature negotiation
231 u64 protocol_features;
233 //Memory region information
235 vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
236 void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS];
237 u64 region_guest_addr_lo[VHOST_MEMORY_MAX_NREGIONS];
238 u64 region_guest_addr_hi[VHOST_MEMORY_MAX_NREGIONS];
239 u32 region_mmap_fd[VHOST_MEMORY_MAX_NREGIONS];
242 vhost_user_vring_t vrings[VHOST_VRING_MAX_N];
243 volatile u32 *vring_locks[VHOST_VRING_MAX_N];
245 int virtio_net_hdr_sz;
251 /* Whether to use spinlock or per_cpu_tx_qid assignment */
255 /* Vector of workers for this interface */
261 u16 vhost_iface_index;
263 } vhost_iface_and_queue_t;
267 vhost_iface_and_queue_t *rx_queues;
274 vhost_user_intf_t *vhost_user_interfaces;
275 u32 *vhost_user_inactive_interfaces_index;
276 uword *vhost_user_interface_index_by_listener_fd;
277 uword *vhost_user_interface_index_by_sock_fd;
278 uword *vhost_user_interface_index_by_sw_if_index;
279 u32 *show_dev_instance_by_real_dev_instance;
282 int dont_dump_vhost_user_memory;
284 /* first cpu index */
285 u32 input_cpu_first_index;
287 /* total cpu count */
290 /** Per-CPU data for vhost-user */
298 u32 virtio_net_hdr_sz;
301 u8 sock_filename[256];
304 } vhost_user_intf_details_t;
306 int vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
307 vhost_user_intf_details_t ** out_vuids);
309 // CLI commands to be used from dpdk
310 clib_error_t *vhost_user_connect_command_fn (vlib_main_t * vm,
311 unformat_input_t * input,
312 vlib_cli_command_t * cmd);
313 clib_error_t *vhost_user_delete_command_fn (vlib_main_t * vm,
314 unformat_input_t * input,
315 vlib_cli_command_t * cmd);
316 clib_error_t *show_vhost_user_command_fn (vlib_main_t * vm,
317 unformat_input_t * input,
318 vlib_cli_command_t * cmd);
323 * fd.io coding-style-patch-verification: ON
326 * eval: (c-set-style "gnu")