FD.io VPP  v18.01.2-1-g9b554f3
Vector Packet Processing
vhost-user.h
Go to the documentation of this file.
1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 #ifndef __VIRTIO_VHOST_USER_H__
16 #define __VIRTIO_VHOST_USER_H__
17 /* vhost-user data structures */
18 
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)
25 
26 #define VHOST_USER_VRING_NOFD_MASK 0x100
27 #define VIRTQ_DESC_F_NEXT 1
28 #define VIRTQ_DESC_F_INDIRECT 4
29 #define VHOST_USER_REPLY_MASK (0x1 << 2)
30 
31 #define VHOST_USER_PROTOCOL_F_MQ 0
32 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
33 #define VHOST_VRING_F_LOG 0
34 
35 #define VHOST_USER_F_PROTOCOL_FEATURES 30
36 #define VHOST_USER_PROTOCOL_FEATURES ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
37  (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD))
38 
39 /* If multiqueue is provided by host, then we suppport it. */
40 #define VIRTIO_NET_CTRL_MQ 4
41 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
42 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
43 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
44 
45 #define VRING_USED_F_NO_NOTIFY 1
46 #define VRING_AVAIL_F_NO_INTERRUPT 1
47 
48 #define foreach_virtio_net_feature \
49  _ (VIRTIO_NET_F_MRG_RXBUF, 15) \
50  _ (VIRTIO_NET_F_CTRL_VQ, 17) \
51  _ (VIRTIO_NET_F_GUEST_ANNOUNCE, 21) \
52  _ (VIRTIO_NET_F_MQ, 22) \
53  _ (VHOST_F_LOG_ALL, 26) \
54  _ (VIRTIO_F_ANY_LAYOUT, 27) \
55  _ (VIRTIO_F_INDIRECT_DESC, 28) \
56  _ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
57  _ (VIRTIO_F_VERSION_1, 32)
58 
59 
60 typedef enum
61 {
62 #define _(f,n) FEAT_##f = (n),
64 #undef _
66 
68  const char *sock_filename, u8 is_server,
69  u32 * sw_if_index, u64 feature_mask,
70  u8 renumber, u32 custom_dev_instance, u8 * hwaddr);
72  const char *sock_filename, u8 is_server,
73  u32 sw_if_index, u64 feature_mask,
74  u8 renumber, u32 custom_dev_instance);
76  u32 sw_if_index);
77 
78 /* *INDENT-OFF* */
80 {
85 } __attribute ((packed)) vhost_user_memory_region_t;
86 
87 typedef struct vhost_user_memory
88 {
91  vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
92 } __attribute ((packed)) vhost_user_memory_t;
93 
94 typedef struct
95 {
96  u32 index, num;
97 } __attribute ((packed)) vhost_vring_state_t;
98 
99 typedef struct
100 {
101  u32 index, flags;
102  u64 desc_user_addr, used_user_addr, avail_user_addr, log_guest_addr;
103 } __attribute ((packed)) vhost_vring_addr_t;
104 
105 typedef struct vhost_user_log
106 {
109 } __attribute ((packed)) vhost_user_log_t;
110 
111 typedef enum vhost_user_req
112 {
134 
135 // vring_desc I/O buffer descriptor
136 typedef struct
137 {
138  uint64_t addr; // packet data buffer address
139  uint32_t len; // packet data buffer size
140  uint16_t flags; // (see below)
141  uint16_t next; // optional index next descriptor in chain
142 } __attribute ((packed)) vring_desc_t;
143 
144 typedef struct
145 {
146  uint16_t flags;
147  volatile uint16_t idx;
148  uint16_t ring[VHOST_VRING_MAX_SIZE];
149 } __attribute ((packed)) vring_avail_t;
150 
151 typedef struct
152 {
153  uint16_t flags;
154  uint16_t idx;
155  struct /* vring_used_elem */
156  {
157  uint32_t id;
158  uint32_t len;
159  } ring[VHOST_VRING_MAX_SIZE];
160 } __attribute ((packed)) vring_used_t;
161 
162 typedef struct
163 {
164  u8 flags;
165  u8 gso_type;
166  u16 hdr_len;
167  u16 gso_size;
168  u16 csum_start;
169  u16 csum_offset;
170 } __attribute ((packed)) virtio_net_hdr_t;
171 
172 typedef struct {
173  virtio_net_hdr_t hdr;
174  u16 num_buffers;
175 } __attribute ((packed)) virtio_net_hdr_mrg_rxbuf_t;
176 
177 typedef struct vhost_user_msg {
178  vhost_user_req_t request;
181  union
182  {
184  vhost_vring_state_t state;
185  vhost_vring_addr_t addr;
186  vhost_user_memory_t memory;
187  vhost_user_log_t log;
188  };
189 } __attribute ((packed)) vhost_user_msg_t;
190 /* *INDENT-ON* */
191 
192 typedef struct
193 {
194  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
199  vring_desc_t *desc;
200  vring_avail_t *avail;
201  vring_used_t *used;
206  //Put non-runtime in a different cache line
207  CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
208  int errfd;
212 
213  /* The rx queue policy (interrupt/adaptive/polling) for this queue */
216 
217 #define VHOST_USER_EVENT_START_TIMER 1
218 #define VHOST_USER_EVENT_STOP_TIMER 2
219 
220 typedef struct
221 {
222  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
227  char sock_filename[256];
230  u32 hw_if_index, sw_if_index;
231 
232  //Feature negotiation
236 
237  //Memory region information
239  vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
240  void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS];
241  u64 region_guest_addr_lo[VHOST_MEMORY_MAX_NREGIONS];
242  u64 region_guest_addr_hi[VHOST_MEMORY_MAX_NREGIONS];
244 
245  //Virtual rings
247  volatile u32 *vring_locks[VHOST_VRING_MAX_N];
248 
251 
254 
255  /* Whether to use spinlock or per_cpu_tx_qid assignment */
258 
259  /* Vector of active rx queues for this interface */
262 
263 typedef struct
264 {
268 } vhost_copy_t;
269 
270 typedef struct
271 {
272  u16 qid; /** The interface queue index (Not the virtio vring idx) */
273  u16 device_index; /** The device index */
274  u32 virtio_ring_flags; /** Runtime queue flags **/
275  u16 first_desc_len; /** Length of the first data descriptor **/
276  virtio_net_hdr_mrg_rxbuf_t hdr; /** Virtio header **/
277 } vhost_trace_t;
278 
279 
280 #define VHOST_USER_RX_BUFFERS_N (2 * VLIB_FRAME_SIZE + 2)
281 #define VHOST_USER_COPY_ARRAY_N (4 * VLIB_FRAME_SIZE)
282 
283 typedef struct
284 {
287 
288  virtio_net_hdr_mrg_rxbuf_t tx_headers[VLIB_FRAME_SIZE];
290 
291  /* This is here so it doesn't end-up
292  * using stack or registers. */
294 } vhost_cpu_t;
295 
296 typedef struct
297 {
305 
306  /** Per-CPU data for vhost-user */
308 
309  /** Pseudo random iterator */
311 
312  /* The number of rx interface/queue pairs in interrupt mode */
314 
315  /* debug on or off */
318 
319 typedef struct
320 {
321  u8 if_name[64];
326  u8 sock_filename[256];
330 
332  vhost_user_intf_details_t ** out_vuids);
333 
334 #endif
335 
336 /*
337  * fd.io coding-style-patch-verification: ON
338  *
339  * Local Variables:
340  * eval: (c-set-style "gnu")
341  * End:
342  */
Definition: mhash.h:46
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:68
vring_desc_t * desc
Definition: vhost-user.h:199
vhost_user_log_t log
Definition: vhost-user.h:187
u32 virtio_ring_flags
The device index.
Definition: vhost-user.h:274
virtio_net_hdr_mrg_rxbuf_t hdr
Length of the first data descriptor.
Definition: vhost-user.h:276
vhost_cpu_t * cpus
Per-CPU data for vhost-user.
Definition: vhost-user.h:307
virtio_net_feature_t
Definition: vhost-user.h:60
enum vhost_user_req vhost_user_req_t
vring_avail_t * avail
Definition: vhost-user.h:200
vhost_vring_state_t state
Definition: vhost-user.h:184
vring_used_t * used
Definition: vhost-user.h:201
vhost_trace_t * current_trace
Definition: vhost-user.h:293
vhost_user_req
Definition: vhost-user.h:111
void * log_base_addr
Definition: vhost-user.h:252
unsigned long u64
Definition: types.h:89
#define VHOST_VRING_MAX_SIZE
Definition: vhost-user.h:21
#define foreach_virtio_net_feature
Definition: vhost-user.h:48
u32 random
Pseudo random iterator.
Definition: vhost-user.h:310
#define VLIB_FRAME_SIZE
Definition: node.h:328
vhost_vring_addr_t addr
Definition: vhost-user.h:185
int vhost_user_modify_if(vnet_main_t *vnm, vlib_main_t *vm, const char *sock_filename, u8 is_server, u32 sw_if_index, u64 feature_mask, u8 renumber, u32 custom_dev_instance)
Definition: vhost-user.c:2919
u32 * show_dev_instance_by_real_dev_instance
Definition: vhost-user.h:301
u16 device_index
The interface queue index (Not the virtio vring idx)
Definition: vhost-user.h:273
vhost_user_intf_t * vhost_user_interfaces
Definition: vhost-user.h:300
vlib_main_t * vm
Definition: buffer.c:283
#define VHOST_USER_COPY_ARRAY_N
Definition: vhost-user.h:281
int vhost_user_create_if(vnet_main_t *vnm, vlib_main_t *vm, const char *sock_filename, u8 is_server, u32 *sw_if_index, u64 feature_mask, u8 renumber, u32 custom_dev_instance, u8 *hwaddr)
Definition: vhost-user.c:2861
#define VHOST_MEMORY_MAX_NREGIONS
Definition: vhost-user.h:19
u16 first_desc_len
Runtime queue flags.
Definition: vhost-user.h:275
vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS]
Definition: vhost-user.h:78
int vhost_user_delete_if(vnet_main_t *vnm, vlib_main_t *vm, u32 sw_if_index)
Definition: vhost-user.c:2644
unsigned int u32
Definition: types.h:88
mhash_t if_index_by_sock_name
Definition: vhost-user.h:298
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
double f64
Definition: types.h:142
#define VHOST_USER_RX_BUFFERS_N
Definition: vhost-user.h:280
unsigned char u8
Definition: types.h:56
#define VHOST_VRING_MAX_N
Definition: vhost-user.h:22
u32 rx_buffers_len
Definition: vhost-user.h:285
vhost_vring_addr_t addr
Definition: vhost-user.h:83
int vhost_user_dump_ifs(vnet_main_t *vnm, vlib_main_t *vm, vhost_user_intf_details_t **out_vuids)
Definition: vhost-user.c:3082
u32 flags
Definition: vhost-user.h:77
vhost_user_memory_t memory
Definition: vhost-user.h:186
vhost_user_req_t request
Definition: vhost-user.h:178
int dont_dump_vhost_user_memory
Definition: vhost-user.h:304