1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2020 Red Hat Inc.
3 */
4
5 #include <sys/ioctl.h>
6 #include <sys/types.h>
7 #include <sys/stat.h>
8 #include <fcntl.h>
9 #include <unistd.h>
10
11 #include <rte_memory.h>
12
13 #include "vhost.h"
14 #include "virtio_user_dev.h"
15
16 struct vhost_vdpa_data {
17 int vhostfd;
18 uint64_t protocol_features;
19 };
20
21 #define VHOST_VDPA_SUPPORTED_BACKEND_FEATURES \
22 (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | \
23 1ULL << VHOST_BACKEND_F_IOTLB_BATCH)
24
25 /* vhost kernel & vdpa ioctls */
26 #define VHOST_VIRTIO 0xAF
27 #define VHOST_GET_FEATURES _IOR(VHOST_VIRTIO, 0x00, __u64)
28 #define VHOST_SET_FEATURES _IOW(VHOST_VIRTIO, 0x00, __u64)
29 #define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01)
30 #define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02)
31 #define VHOST_SET_LOG_BASE _IOW(VHOST_VIRTIO, 0x04, __u64)
32 #define VHOST_SET_LOG_FD _IOW(VHOST_VIRTIO, 0x07, int)
33 #define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state)
34 #define VHOST_SET_VRING_ADDR _IOW(VHOST_VIRTIO, 0x11, struct vhost_vring_addr)
35 #define VHOST_SET_VRING_BASE _IOW(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
36 #define VHOST_GET_VRING_BASE _IOWR(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
37 #define VHOST_SET_VRING_KICK _IOW(VHOST_VIRTIO, 0x20, struct vhost_vring_file)
38 #define VHOST_SET_VRING_CALL _IOW(VHOST_VIRTIO, 0x21, struct vhost_vring_file)
39 #define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file)
40 #define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file)
41 #define VHOST_VDPA_GET_DEVICE_ID _IOR(VHOST_VIRTIO, 0x70, __u32)
42 #define VHOST_VDPA_GET_STATUS _IOR(VHOST_VIRTIO, 0x71, __u8)
43 #define VHOST_VDPA_SET_STATUS _IOW(VHOST_VIRTIO, 0x72, __u8)
44 #define VHOST_VDPA_GET_CONFIG _IOR(VHOST_VIRTIO, 0x73, struct vhost_vdpa_config)
45 #define VHOST_VDPA_SET_CONFIG _IOW(VHOST_VIRTIO, 0x74, struct vhost_vdpa_config)
46 #define VHOST_VDPA_SET_VRING_ENABLE _IOW(VHOST_VIRTIO, 0x75, struct vhost_vring_state)
47 #define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
48 #define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
49
50 /* no alignment requirement */
51 struct vhost_iotlb_msg {
52 uint64_t iova;
53 uint64_t size;
54 uint64_t uaddr;
55 #define VHOST_ACCESS_RO 0x1
56 #define VHOST_ACCESS_WO 0x2
57 #define VHOST_ACCESS_RW 0x3
58 uint8_t perm;
59 #define VHOST_IOTLB_MISS 1
60 #define VHOST_IOTLB_UPDATE 2
61 #define VHOST_IOTLB_INVALIDATE 3
62 #define VHOST_IOTLB_ACCESS_FAIL 4
63 #define VHOST_IOTLB_BATCH_BEGIN 5
64 #define VHOST_IOTLB_BATCH_END 6
65 uint8_t type;
66 };
67
68 #define VHOST_IOTLB_MSG_V2 0x2
69
70 struct vhost_vdpa_config {
71 uint32_t off;
72 uint32_t len;
73 uint8_t buf[0];
74 };
75
76 struct vhost_msg {
77 uint32_t type;
78 uint32_t reserved;
79 union {
80 struct vhost_iotlb_msg iotlb;
81 uint8_t padding[64];
82 };
83 };
84
85
86 static int
vhost_vdpa_ioctl(int fd,uint64_t request,void * arg)87 vhost_vdpa_ioctl(int fd, uint64_t request, void *arg)
88 {
89 int ret;
90
91 ret = ioctl(fd, request, arg);
92 if (ret) {
93 PMD_DRV_LOG(ERR, "Vhost-vDPA ioctl %"PRIu64" failed (%s)",
94 request, strerror(errno));
95 return -1;
96 }
97
98 return 0;
99 }
100
101 static int
vhost_vdpa_set_owner(struct virtio_user_dev * dev)102 vhost_vdpa_set_owner(struct virtio_user_dev *dev)
103 {
104 struct vhost_vdpa_data *data = dev->backend_data;
105
106 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_OWNER, NULL);
107 }
108
109 static int
vhost_vdpa_get_protocol_features(struct virtio_user_dev * dev,uint64_t * features)110 vhost_vdpa_get_protocol_features(struct virtio_user_dev *dev, uint64_t *features)
111 {
112 struct vhost_vdpa_data *data = dev->backend_data;
113
114 return vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_BACKEND_FEATURES, features);
115 }
116
117 static int
vhost_vdpa_set_protocol_features(struct virtio_user_dev * dev,uint64_t features)118 vhost_vdpa_set_protocol_features(struct virtio_user_dev *dev, uint64_t features)
119 {
120 struct vhost_vdpa_data *data = dev->backend_data;
121
122 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_BACKEND_FEATURES, &features);
123 }
124
125 static int
vhost_vdpa_get_features(struct virtio_user_dev * dev,uint64_t * features)126 vhost_vdpa_get_features(struct virtio_user_dev *dev, uint64_t *features)
127 {
128 struct vhost_vdpa_data *data = dev->backend_data;
129 int ret;
130
131 ret = vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_FEATURES, features);
132 if (ret) {
133 PMD_DRV_LOG(ERR, "Failed to get features");
134 return -1;
135 }
136
137 /* Multiqueue not supported for now */
138 *features &= ~(1ULL << VIRTIO_NET_F_MQ);
139
140 /* Negotiated vDPA backend features */
141 ret = vhost_vdpa_get_protocol_features(dev, &data->protocol_features);
142 if (ret < 0) {
143 PMD_DRV_LOG(ERR, "Failed to get backend features");
144 return -1;
145 }
146
147 data->protocol_features &= VHOST_VDPA_SUPPORTED_BACKEND_FEATURES;
148
149 ret = vhost_vdpa_set_protocol_features(dev, data->protocol_features);
150 if (ret < 0) {
151 PMD_DRV_LOG(ERR, "Failed to set backend features");
152 return -1;
153 }
154
155 return 0;
156 }
157
158 static int
vhost_vdpa_set_features(struct virtio_user_dev * dev,uint64_t features)159 vhost_vdpa_set_features(struct virtio_user_dev *dev, uint64_t features)
160 {
161 struct vhost_vdpa_data *data = dev->backend_data;
162
163 /* WORKAROUND */
164 features |= 1ULL << VIRTIO_F_IOMMU_PLATFORM;
165
166 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_FEATURES, &features);
167 }
168
169 static int
vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev * dev)170 vhost_vdpa_iotlb_batch_begin(struct virtio_user_dev *dev)
171 {
172 struct vhost_vdpa_data *data = dev->backend_data;
173 struct vhost_msg msg = {};
174
175 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
176 return 0;
177
178 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2))) {
179 PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
180 return -1;
181 }
182
183 msg.type = VHOST_IOTLB_MSG_V2;
184 msg.iotlb.type = VHOST_IOTLB_BATCH_BEGIN;
185
186 if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
187 PMD_DRV_LOG(ERR, "Failed to send IOTLB batch begin (%s)",
188 strerror(errno));
189 return -1;
190 }
191
192 return 0;
193 }
194
195 static int
vhost_vdpa_iotlb_batch_end(struct virtio_user_dev * dev)196 vhost_vdpa_iotlb_batch_end(struct virtio_user_dev *dev)
197 {
198 struct vhost_vdpa_data *data = dev->backend_data;
199 struct vhost_msg msg = {};
200
201 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_BATCH)))
202 return 0;
203
204 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2))) {
205 PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
206 return -1;
207 }
208
209 msg.type = VHOST_IOTLB_MSG_V2;
210 msg.iotlb.type = VHOST_IOTLB_BATCH_END;
211
212 if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
213 PMD_DRV_LOG(ERR, "Failed to send IOTLB batch end (%s)",
214 strerror(errno));
215 return -1;
216 }
217
218 return 0;
219 }
220
221 static int
vhost_vdpa_dma_map(struct virtio_user_dev * dev,void * addr,uint64_t iova,size_t len)222 vhost_vdpa_dma_map(struct virtio_user_dev *dev, void *addr,
223 uint64_t iova, size_t len)
224 {
225 struct vhost_vdpa_data *data = dev->backend_data;
226 struct vhost_msg msg = {};
227
228 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2))) {
229 PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
230 return -1;
231 }
232
233 msg.type = VHOST_IOTLB_MSG_V2;
234 msg.iotlb.type = VHOST_IOTLB_UPDATE;
235 msg.iotlb.iova = iova;
236 msg.iotlb.uaddr = (uint64_t)(uintptr_t)addr;
237 msg.iotlb.size = len;
238 msg.iotlb.perm = VHOST_ACCESS_RW;
239
240 PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", addr: %p, len: 0x%zx",
241 __func__, iova, addr, len);
242
243 if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
244 PMD_DRV_LOG(ERR, "Failed to send IOTLB update (%s)",
245 strerror(errno));
246 return -1;
247 }
248
249 return 0;
250 }
251
252 static int
vhost_vdpa_dma_unmap(struct virtio_user_dev * dev,__rte_unused void * addr,uint64_t iova,size_t len)253 vhost_vdpa_dma_unmap(struct virtio_user_dev *dev, __rte_unused void *addr,
254 uint64_t iova, size_t len)
255 {
256 struct vhost_vdpa_data *data = dev->backend_data;
257 struct vhost_msg msg = {};
258
259 if (!(data->protocol_features & (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2))) {
260 PMD_DRV_LOG(ERR, "IOTLB_MSG_V2 not supported by the backend.");
261 return -1;
262 }
263
264 msg.type = VHOST_IOTLB_MSG_V2;
265 msg.iotlb.type = VHOST_IOTLB_INVALIDATE;
266 msg.iotlb.iova = iova;
267 msg.iotlb.size = len;
268
269 PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", len: 0x%zx",
270 __func__, iova, len);
271
272 if (write(data->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
273 PMD_DRV_LOG(ERR, "Failed to send IOTLB invalidate (%s)",
274 strerror(errno));
275 return -1;
276 }
277
278 return 0;
279 }
280
281 static int
vhost_vdpa_dma_map_batch(struct virtio_user_dev * dev,void * addr,uint64_t iova,size_t len)282 vhost_vdpa_dma_map_batch(struct virtio_user_dev *dev, void *addr,
283 uint64_t iova, size_t len)
284 {
285 int ret;
286
287 if (vhost_vdpa_iotlb_batch_begin(dev) < 0)
288 return -1;
289
290 ret = vhost_vdpa_dma_map(dev, addr, iova, len);
291
292 if (vhost_vdpa_iotlb_batch_end(dev) < 0)
293 return -1;
294
295 return ret;
296 }
297
298 static int
vhost_vdpa_dma_unmap_batch(struct virtio_user_dev * dev,void * addr,uint64_t iova,size_t len)299 vhost_vdpa_dma_unmap_batch(struct virtio_user_dev *dev, void *addr,
300 uint64_t iova, size_t len)
301 {
302 int ret;
303
304 if (vhost_vdpa_iotlb_batch_begin(dev) < 0)
305 return -1;
306
307 ret = vhost_vdpa_dma_unmap(dev, addr, iova, len);
308
309 if (vhost_vdpa_iotlb_batch_end(dev) < 0)
310 return -1;
311
312 return ret;
313 }
314
315 static int
vhost_vdpa_map_contig(const struct rte_memseg_list * msl,const struct rte_memseg * ms,size_t len,void * arg)316 vhost_vdpa_map_contig(const struct rte_memseg_list *msl,
317 const struct rte_memseg *ms, size_t len, void *arg)
318 {
319 struct virtio_user_dev *dev = arg;
320
321 if (msl->external)
322 return 0;
323
324 return vhost_vdpa_dma_map(dev, ms->addr, ms->iova, len);
325 }
326
327 static int
vhost_vdpa_map(const struct rte_memseg_list * msl,const struct rte_memseg * ms,void * arg)328 vhost_vdpa_map(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
329 void *arg)
330 {
331 struct virtio_user_dev *dev = arg;
332
333 /* skip external memory that isn't a heap */
334 if (msl->external && !msl->heap)
335 return 0;
336
337 /* skip any segments with invalid IOVA addresses */
338 if (ms->iova == RTE_BAD_IOVA)
339 return 0;
340
341 /* if IOVA mode is VA, we've already mapped the internal segments */
342 if (!msl->external && rte_eal_iova_mode() == RTE_IOVA_VA)
343 return 0;
344
345 return vhost_vdpa_dma_map(dev, ms->addr, ms->iova, ms->len);
346 }
347
348 static int
vhost_vdpa_set_memory_table(struct virtio_user_dev * dev)349 vhost_vdpa_set_memory_table(struct virtio_user_dev *dev)
350 {
351 int ret;
352
353 if (vhost_vdpa_iotlb_batch_begin(dev) < 0)
354 return -1;
355
356 vhost_vdpa_dma_unmap(dev, NULL, 0, SIZE_MAX);
357
358 if (rte_eal_iova_mode() == RTE_IOVA_VA) {
359 /* with IOVA as VA mode, we can get away with mapping contiguous
360 * chunks rather than going page-by-page.
361 */
362 ret = rte_memseg_contig_walk_thread_unsafe(
363 vhost_vdpa_map_contig, dev);
364 if (ret)
365 goto batch_end;
366 /* we have to continue the walk because we've skipped the
367 * external segments during the config walk.
368 */
369 }
370 ret = rte_memseg_walk_thread_unsafe(vhost_vdpa_map, dev);
371
372 batch_end:
373 if (vhost_vdpa_iotlb_batch_end(dev) < 0)
374 return -1;
375
376 return ret;
377 }
378
379 static int
vhost_vdpa_set_vring_enable(struct virtio_user_dev * dev,struct vhost_vring_state * state)380 vhost_vdpa_set_vring_enable(struct virtio_user_dev *dev, struct vhost_vring_state *state)
381 {
382 struct vhost_vdpa_data *data = dev->backend_data;
383
384 return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_SET_VRING_ENABLE, state);
385 }
386
387 static int
vhost_vdpa_set_vring_num(struct virtio_user_dev * dev,struct vhost_vring_state * state)388 vhost_vdpa_set_vring_num(struct virtio_user_dev *dev, struct vhost_vring_state *state)
389 {
390 struct vhost_vdpa_data *data = dev->backend_data;
391
392 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_NUM, state);
393 }
394
395 static int
vhost_vdpa_set_vring_base(struct virtio_user_dev * dev,struct vhost_vring_state * state)396 vhost_vdpa_set_vring_base(struct virtio_user_dev *dev, struct vhost_vring_state *state)
397 {
398 struct vhost_vdpa_data *data = dev->backend_data;
399
400 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_BASE, state);
401 }
402
403 static int
vhost_vdpa_get_vring_base(struct virtio_user_dev * dev,struct vhost_vring_state * state)404 vhost_vdpa_get_vring_base(struct virtio_user_dev *dev, struct vhost_vring_state *state)
405 {
406 struct vhost_vdpa_data *data = dev->backend_data;
407
408 return vhost_vdpa_ioctl(data->vhostfd, VHOST_GET_VRING_BASE, state);
409 }
410
411 static int
vhost_vdpa_set_vring_call(struct virtio_user_dev * dev,struct vhost_vring_file * file)412 vhost_vdpa_set_vring_call(struct virtio_user_dev *dev, struct vhost_vring_file *file)
413 {
414 struct vhost_vdpa_data *data = dev->backend_data;
415
416 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_CALL, file);
417 }
418
419 static int
vhost_vdpa_set_vring_kick(struct virtio_user_dev * dev,struct vhost_vring_file * file)420 vhost_vdpa_set_vring_kick(struct virtio_user_dev *dev, struct vhost_vring_file *file)
421 {
422 struct vhost_vdpa_data *data = dev->backend_data;
423
424 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_KICK, file);
425 }
426
427 static int
vhost_vdpa_set_vring_addr(struct virtio_user_dev * dev,struct vhost_vring_addr * addr)428 vhost_vdpa_set_vring_addr(struct virtio_user_dev *dev, struct vhost_vring_addr *addr)
429 {
430 struct vhost_vdpa_data *data = dev->backend_data;
431
432 return vhost_vdpa_ioctl(data->vhostfd, VHOST_SET_VRING_ADDR, addr);
433 }
434
435 static int
vhost_vdpa_get_status(struct virtio_user_dev * dev,uint8_t * status)436 vhost_vdpa_get_status(struct virtio_user_dev *dev, uint8_t *status)
437 {
438 struct vhost_vdpa_data *data = dev->backend_data;
439
440 return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_GET_STATUS, status);
441 }
442
443 static int
vhost_vdpa_set_status(struct virtio_user_dev * dev,uint8_t status)444 vhost_vdpa_set_status(struct virtio_user_dev *dev, uint8_t status)
445 {
446 struct vhost_vdpa_data *data = dev->backend_data;
447
448 return vhost_vdpa_ioctl(data->vhostfd, VHOST_VDPA_SET_STATUS, &status);
449 }
450
451 static int
vhost_vdpa_get_config(struct virtio_user_dev * dev,uint8_t * data,uint32_t off,uint32_t len)452 vhost_vdpa_get_config(struct virtio_user_dev *dev, uint8_t *data, uint32_t off, uint32_t len)
453 {
454 struct vhost_vdpa_data *vdpa_data = dev->backend_data;
455 struct vhost_vdpa_config *config;
456 int ret = 0;
457
458 config = malloc(sizeof(*config) + len);
459 if (!config) {
460 PMD_DRV_LOG(ERR, "Failed to allocate vDPA config data");
461 return -1;
462 }
463
464 config->off = off;
465 config->len = len;
466
467 ret = vhost_vdpa_ioctl(vdpa_data->vhostfd, VHOST_VDPA_GET_CONFIG, config);
468 if (ret) {
469 PMD_DRV_LOG(ERR, "Failed to get vDPA config (offset 0x%x, len 0x%x)", off, len);
470 ret = -1;
471 goto out;
472 }
473
474 memcpy(data, config->buf, len);
475 out:
476 free(config);
477
478 return ret;
479 }
480
481 static int
vhost_vdpa_set_config(struct virtio_user_dev * dev,const uint8_t * data,uint32_t off,uint32_t len)482 vhost_vdpa_set_config(struct virtio_user_dev *dev, const uint8_t *data, uint32_t off, uint32_t len)
483 {
484 struct vhost_vdpa_data *vdpa_data = dev->backend_data;
485 struct vhost_vdpa_config *config;
486 int ret = 0;
487
488 config = malloc(sizeof(*config) + len);
489 if (!config) {
490 PMD_DRV_LOG(ERR, "Failed to allocate vDPA config data");
491 return -1;
492 }
493
494 config->off = off;
495 config->len = len;
496
497 memcpy(config->buf, data, len);
498
499 ret = vhost_vdpa_ioctl(vdpa_data->vhostfd, VHOST_VDPA_SET_CONFIG, config);
500 if (ret) {
501 PMD_DRV_LOG(ERR, "Failed to set vDPA config (offset 0x%x, len 0x%x)", off, len);
502 ret = -1;
503 }
504
505 free(config);
506
507 return ret;
508 }
509
510 /**
511 * Set up environment to talk with a vhost vdpa backend.
512 *
513 * @return
514 * - (-1) if fail to set up;
515 * - (>=0) if successful.
516 */
517 static int
vhost_vdpa_setup(struct virtio_user_dev * dev)518 vhost_vdpa_setup(struct virtio_user_dev *dev)
519 {
520 struct vhost_vdpa_data *data;
521 uint32_t did = (uint32_t)-1;
522
523 data = malloc(sizeof(*data));
524 if (!data) {
525 PMD_DRV_LOG(ERR, "(%s) Faidle to allocate backend data", dev->path);
526 return -1;
527 }
528
529 data->vhostfd = open(dev->path, O_RDWR);
530 if (data->vhostfd < 0) {
531 PMD_DRV_LOG(ERR, "Failed to open %s: %s",
532 dev->path, strerror(errno));
533 free(data);
534 return -1;
535 }
536
537 if (ioctl(data->vhostfd, VHOST_VDPA_GET_DEVICE_ID, &did) < 0 ||
538 did != VIRTIO_ID_NETWORK) {
539 PMD_DRV_LOG(ERR, "Invalid vdpa device ID: %u", did);
540 close(data->vhostfd);
541 free(data);
542 return -1;
543 }
544
545 dev->backend_data = data;
546
547 return 0;
548 }
549
550 static int
vhost_vdpa_destroy(struct virtio_user_dev * dev)551 vhost_vdpa_destroy(struct virtio_user_dev *dev)
552 {
553 struct vhost_vdpa_data *data = dev->backend_data;
554
555 if (!data)
556 return 0;
557
558 close(data->vhostfd);
559
560 free(data);
561 dev->backend_data = NULL;
562
563 return 0;
564 }
565
566 static int
vhost_vdpa_enable_queue_pair(struct virtio_user_dev * dev,uint16_t pair_idx,int enable)567 vhost_vdpa_enable_queue_pair(struct virtio_user_dev *dev,
568 uint16_t pair_idx,
569 int enable)
570 {
571 int i;
572
573 if (dev->qp_enabled[pair_idx] == enable)
574 return 0;
575
576 for (i = 0; i < 2; ++i) {
577 struct vhost_vring_state state = {
578 .index = pair_idx * 2 + i,
579 .num = enable,
580 };
581
582 if (vhost_vdpa_set_vring_enable(dev, &state))
583 return -1;
584 }
585
586 dev->qp_enabled[pair_idx] = enable;
587
588 return 0;
589 }
590
591 static int
vhost_vdpa_get_backend_features(uint64_t * features)592 vhost_vdpa_get_backend_features(uint64_t *features)
593 {
594 *features = 0;
595
596 return 0;
597 }
598
599 static int
vhost_vdpa_update_link_state(struct virtio_user_dev * dev __rte_unused)600 vhost_vdpa_update_link_state(struct virtio_user_dev *dev __rte_unused)
601 {
602 /* Nothing to update (for now?) */
603 return 0;
604 }
605
606 static int
vhost_vdpa_get_intr_fd(struct virtio_user_dev * dev __rte_unused)607 vhost_vdpa_get_intr_fd(struct virtio_user_dev *dev __rte_unused)
608 {
609 /* No link state interrupt with Vhost-vDPA */
610 return -1;
611 }
612
613 struct virtio_user_backend_ops virtio_ops_vdpa = {
614 .setup = vhost_vdpa_setup,
615 .destroy = vhost_vdpa_destroy,
616 .get_backend_features = vhost_vdpa_get_backend_features,
617 .set_owner = vhost_vdpa_set_owner,
618 .get_features = vhost_vdpa_get_features,
619 .set_features = vhost_vdpa_set_features,
620 .set_memory_table = vhost_vdpa_set_memory_table,
621 .set_vring_num = vhost_vdpa_set_vring_num,
622 .set_vring_base = vhost_vdpa_set_vring_base,
623 .get_vring_base = vhost_vdpa_get_vring_base,
624 .set_vring_call = vhost_vdpa_set_vring_call,
625 .set_vring_kick = vhost_vdpa_set_vring_kick,
626 .set_vring_addr = vhost_vdpa_set_vring_addr,
627 .get_status = vhost_vdpa_get_status,
628 .set_status = vhost_vdpa_set_status,
629 .get_config = vhost_vdpa_get_config,
630 .set_config = vhost_vdpa_set_config,
631 .enable_qp = vhost_vdpa_enable_queue_pair,
632 .dma_map = vhost_vdpa_dma_map_batch,
633 .dma_unmap = vhost_vdpa_dma_unmap_batch,
634 .update_link_state = vhost_vdpa_update_link_state,
635 .get_intr_fd = vhost_vdpa_get_intr_fd,
636 };
637