]>
Commit | Line | Data |
---|---|---|
1e0a84ea CL |
1 | /* |
2 | * vhost-vdpa.c | |
3 | * | |
4 | * Copyright(c) 2017-2018 Intel Corporation. | |
5 | * Copyright(c) 2020 Red Hat, Inc. | |
6 | * | |
7 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
8 | * See the COPYING file in the top-level directory. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include "qemu/osdep.h" | |
13 | #include "clients.h" | |
bd907ae4 | 14 | #include "hw/virtio/virtio-net.h" |
1e0a84ea CL |
15 | #include "net/vhost_net.h" |
16 | #include "net/vhost-vdpa.h" | |
17 | #include "hw/virtio/vhost-vdpa.h" | |
18 | #include "qemu/config-file.h" | |
19 | #include "qemu/error-report.h" | |
bd907ae4 EP |
20 | #include "qemu/log.h" |
21 | #include "qemu/memalign.h" | |
1e0a84ea CL |
22 | #include "qemu/option.h" |
23 | #include "qapi/error.h" | |
40237840 | 24 | #include <linux/vhost.h> |
1e0a84ea CL |
25 | #include <sys/ioctl.h> |
26 | #include <err.h> | |
27 | #include "standard-headers/linux/virtio_net.h" | |
28 | #include "monitor/monitor.h" | |
69498430 EP |
29 | #include "migration/migration.h" |
30 | #include "migration/misc.h" | |
1e0a84ea CL |
31 | #include "hw/virtio/vhost.h" |
32 | ||
33 | /* Todo:need to add the multiqueue support here */ | |
34 | typedef struct VhostVDPAState { | |
35 | NetClientState nc; | |
36 | struct vhost_vdpa vhost_vdpa; | |
69498430 | 37 | Notifier migration_state; |
1e0a84ea | 38 | VHostNetState *vhost_net; |
2df4dd31 EP |
39 | |
40 | /* Control commands shadow buffers */ | |
17fb889f EP |
41 | void *cvq_cmd_out_buffer; |
42 | virtio_net_ctrl_ack *status; | |
43 | ||
7f211a28 EP |
44 | /* The device always have SVQ enabled */ |
45 | bool always_svq; | |
1e0a84ea CL |
46 | bool started; |
47 | } VhostVDPAState; | |
48 | ||
49 | const int vdpa_feature_bits[] = { | |
50 | VIRTIO_F_NOTIFY_ON_EMPTY, | |
51 | VIRTIO_RING_F_INDIRECT_DESC, | |
52 | VIRTIO_RING_F_EVENT_IDX, | |
53 | VIRTIO_F_ANY_LAYOUT, | |
54 | VIRTIO_F_VERSION_1, | |
55 | VIRTIO_NET_F_CSUM, | |
56 | VIRTIO_NET_F_GUEST_CSUM, | |
57 | VIRTIO_NET_F_GSO, | |
58 | VIRTIO_NET_F_GUEST_TSO4, | |
59 | VIRTIO_NET_F_GUEST_TSO6, | |
60 | VIRTIO_NET_F_GUEST_ECN, | |
61 | VIRTIO_NET_F_GUEST_UFO, | |
62 | VIRTIO_NET_F_HOST_TSO4, | |
63 | VIRTIO_NET_F_HOST_TSO6, | |
64 | VIRTIO_NET_F_HOST_ECN, | |
65 | VIRTIO_NET_F_HOST_UFO, | |
66 | VIRTIO_NET_F_MRG_RXBUF, | |
67 | VIRTIO_NET_F_MTU, | |
40237840 JW |
68 | VIRTIO_NET_F_CTRL_RX, |
69 | VIRTIO_NET_F_CTRL_RX_EXTRA, | |
70 | VIRTIO_NET_F_CTRL_VLAN, | |
40237840 JW |
71 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
72 | VIRTIO_NET_F_RSS, | |
73 | VIRTIO_NET_F_MQ, | |
74 | VIRTIO_NET_F_CTRL_VQ, | |
1e0a84ea CL |
75 | VIRTIO_F_IOMMU_PLATFORM, |
76 | VIRTIO_F_RING_PACKED, | |
562a7d23 | 77 | VIRTIO_F_RING_RESET, |
0145c393 AM |
78 | VIRTIO_NET_F_RSS, |
79 | VIRTIO_NET_F_HASH_REPORT, | |
9aa47edd | 80 | VIRTIO_NET_F_STATUS, |
1e0a84ea CL |
81 | VHOST_INVALID_FEATURE_BIT |
82 | }; | |
83 | ||
1576dbb5 EP |
84 | /** Supported device specific feature bits with SVQ */ |
85 | static const uint64_t vdpa_svq_device_features = | |
86 | BIT_ULL(VIRTIO_NET_F_CSUM) | | |
87 | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | | |
88 | BIT_ULL(VIRTIO_NET_F_MTU) | | |
89 | BIT_ULL(VIRTIO_NET_F_MAC) | | |
90 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | | |
91 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | | |
92 | BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | | |
93 | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | | |
94 | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | | |
95 | BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | | |
96 | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | | |
97 | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | | |
98 | BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | | |
99 | BIT_ULL(VIRTIO_NET_F_STATUS) | | |
100 | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | | |
72b99a87 | 101 | BIT_ULL(VIRTIO_NET_F_MQ) | |
1576dbb5 EP |
102 | BIT_ULL(VIRTIO_F_ANY_LAYOUT) | |
103 | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | | |
609ab4c3 EP |
104 | /* VHOST_F_LOG_ALL is exposed by SVQ */ |
105 | BIT_ULL(VHOST_F_LOG_ALL) | | |
1576dbb5 | 106 | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | |
0d74e2b7 EP |
107 | BIT_ULL(VIRTIO_NET_F_STANDBY) | |
108 | BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); | |
1576dbb5 | 109 | |
c1a10086 EP |
110 | #define VHOST_VDPA_NET_CVQ_ASID 1 |
111 | ||
1e0a84ea CL |
112 | VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) |
113 | { | |
114 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
115 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
116 | return s->vhost_net; | |
117 | } | |
118 | ||
36e46472 EP |
119 | static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) |
120 | { | |
121 | uint64_t invalid_dev_features = | |
122 | features & ~vdpa_svq_device_features & | |
123 | /* Transport are all accepted at this point */ | |
124 | ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, | |
125 | VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); | |
126 | ||
127 | if (invalid_dev_features) { | |
128 | error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, | |
129 | invalid_dev_features); | |
258a0394 | 130 | return false; |
36e46472 EP |
131 | } |
132 | ||
258a0394 | 133 | return vhost_svq_valid_features(features, errp); |
36e46472 EP |
134 | } |
135 | ||
1e0a84ea CL |
136 | static int vhost_vdpa_net_check_device_id(struct vhost_net *net) |
137 | { | |
138 | uint32_t device_id; | |
139 | int ret; | |
140 | struct vhost_dev *hdev; | |
141 | ||
142 | hdev = (struct vhost_dev *)&net->dev; | |
143 | ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); | |
144 | if (device_id != VIRTIO_ID_NET) { | |
145 | return -ENOTSUP; | |
146 | } | |
147 | return ret; | |
148 | } | |
149 | ||
40237840 JW |
150 | static int vhost_vdpa_add(NetClientState *ncs, void *be, |
151 | int queue_pair_index, int nvqs) | |
1e0a84ea CL |
152 | { |
153 | VhostNetOptions options; | |
154 | struct vhost_net *net = NULL; | |
155 | VhostVDPAState *s; | |
156 | int ret; | |
157 | ||
158 | options.backend_type = VHOST_BACKEND_TYPE_VDPA; | |
159 | assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
160 | s = DO_UPCAST(VhostVDPAState, nc, ncs); | |
161 | options.net_backend = ncs; | |
162 | options.opaque = be; | |
163 | options.busyloop_timeout = 0; | |
40237840 | 164 | options.nvqs = nvqs; |
1e0a84ea CL |
165 | |
166 | net = vhost_net_init(&options); | |
167 | if (!net) { | |
168 | error_report("failed to init vhost_net for queue"); | |
a97ef87a | 169 | goto err_init; |
1e0a84ea | 170 | } |
1e0a84ea CL |
171 | s->vhost_net = net; |
172 | ret = vhost_vdpa_net_check_device_id(net); | |
173 | if (ret) { | |
a97ef87a | 174 | goto err_check; |
1e0a84ea CL |
175 | } |
176 | return 0; | |
a97ef87a JW |
177 | err_check: |
178 | vhost_net_cleanup(net); | |
179 | g_free(net); | |
180 | err_init: | |
1e0a84ea CL |
181 | return -1; |
182 | } | |
183 | ||
184 | static void vhost_vdpa_cleanup(NetClientState *nc) | |
185 | { | |
186 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
187 | ||
2df4dd31 | 188 | qemu_vfree(s->cvq_cmd_out_buffer); |
17fb889f | 189 | qemu_vfree(s->status); |
1e0a84ea CL |
190 | if (s->vhost_net) { |
191 | vhost_net_cleanup(s->vhost_net); | |
192 | g_free(s->vhost_net); | |
193 | s->vhost_net = NULL; | |
194 | } | |
57b3a7d8 CL |
195 | if (s->vhost_vdpa.device_fd >= 0) { |
196 | qemu_close(s->vhost_vdpa.device_fd); | |
197 | s->vhost_vdpa.device_fd = -1; | |
198 | } | |
1e0a84ea CL |
199 | } |
200 | ||
201 | static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) | |
202 | { | |
203 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
204 | ||
205 | return true; | |
206 | } | |
207 | ||
208 | static bool vhost_vdpa_has_ufo(NetClientState *nc) | |
209 | { | |
210 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
211 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
212 | uint64_t features = 0; | |
213 | features |= (1ULL << VIRTIO_NET_F_HOST_UFO); | |
214 | features = vhost_net_get_features(s->vhost_net, features); | |
215 | return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); | |
216 | ||
217 | } | |
218 | ||
ee8a1c63 KW |
219 | static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, |
220 | Error **errp) | |
221 | { | |
222 | const char *driver = object_class_get_name(oc); | |
223 | ||
224 | if (!g_str_has_prefix(driver, "virtio-net-")) { | |
225 | error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); | |
226 | return false; | |
227 | } | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
846a1e85 EP |
232 | /** Dummy receive in case qemu falls back to userland tap networking */ |
233 | static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, | |
234 | size_t size) | |
235 | { | |
bc5add1d | 236 | return size; |
846a1e85 EP |
237 | } |
238 | ||
00ef422e EP |
239 | /** From any vdpa net client, get the netclient of the first queue pair */ |
240 | static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) | |
241 | { | |
242 | NICState *nic = qemu_get_nic(s->nc.peer); | |
243 | NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); | |
244 | ||
245 | return DO_UPCAST(VhostVDPAState, nc, nc0); | |
246 | } | |
247 | ||
69498430 EP |
248 | static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) |
249 | { | |
250 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
251 | VirtIONet *n; | |
252 | VirtIODevice *vdev; | |
253 | int data_queue_pairs, cvq, r; | |
254 | ||
255 | /* We are only called on the first data vqs and only if x-svq is not set */ | |
256 | if (s->vhost_vdpa.shadow_vqs_enabled == enable) { | |
257 | return; | |
258 | } | |
259 | ||
260 | vdev = v->dev->vdev; | |
261 | n = VIRTIO_NET(vdev); | |
262 | if (!n->vhost_started) { | |
263 | return; | |
264 | } | |
265 | ||
266 | data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; | |
267 | cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? | |
268 | n->max_ncs - n->max_queue_pairs : 0; | |
269 | /* | |
270 | * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter | |
271 | * in the future and resume the device if read-only operations between | |
272 | * suspend and reset goes wrong. | |
273 | */ | |
274 | vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); | |
275 | ||
276 | /* Start will check migration setup_or_active to configure or not SVQ */ | |
277 | r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); | |
278 | if (unlikely(r < 0)) { | |
279 | error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); | |
280 | } | |
281 | } | |
282 | ||
283 | static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) | |
284 | { | |
285 | MigrationState *migration = data; | |
286 | VhostVDPAState *s = container_of(notifier, VhostVDPAState, | |
287 | migration_state); | |
288 | ||
289 | if (migration_in_setup(migration)) { | |
290 | vhost_vdpa_net_log_global_enable(s, true); | |
291 | } else if (migration_has_failed(migration)) { | |
292 | vhost_vdpa_net_log_global_enable(s, false); | |
293 | } | |
294 | } | |
295 | ||
00ef422e EP |
296 | static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) |
297 | { | |
298 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
299 | ||
69498430 | 300 | add_migration_state_change_notifier(&s->migration_state); |
00ef422e EP |
301 | if (v->shadow_vqs_enabled) { |
302 | v->iova_tree = vhost_iova_tree_new(v->iova_range.first, | |
303 | v->iova_range.last); | |
304 | } | |
305 | } | |
306 | ||
307 | static int vhost_vdpa_net_data_start(NetClientState *nc) | |
308 | { | |
309 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
310 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
311 | ||
312 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
313 | ||
69498430 EP |
314 | if (s->always_svq || |
315 | migration_is_setup_or_active(migrate_get_current()->state)) { | |
316 | v->shadow_vqs_enabled = true; | |
317 | v->shadow_data = true; | |
318 | } else { | |
319 | v->shadow_vqs_enabled = false; | |
320 | v->shadow_data = false; | |
321 | } | |
322 | ||
00ef422e EP |
323 | if (v->index == 0) { |
324 | vhost_vdpa_net_data_start_first(s); | |
325 | return 0; | |
326 | } | |
327 | ||
328 | if (v->shadow_vqs_enabled) { | |
329 | VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); | |
330 | v->iova_tree = s0->vhost_vdpa.iova_tree; | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static void vhost_vdpa_net_client_stop(NetClientState *nc) | |
337 | { | |
338 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
339 | struct vhost_dev *dev; | |
340 | ||
341 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
342 | ||
69498430 EP |
343 | if (s->vhost_vdpa.index == 0) { |
344 | remove_migration_state_change_notifier(&s->migration_state); | |
345 | } | |
346 | ||
00ef422e EP |
347 | dev = s->vhost_vdpa.dev; |
348 | if (dev->vq_index + dev->nvqs == dev->vq_index_end) { | |
349 | g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); | |
350 | } | |
351 | } | |
352 | ||
1e0a84ea CL |
353 | static NetClientInfo net_vhost_vdpa_info = { |
354 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
355 | .size = sizeof(VhostVDPAState), | |
846a1e85 | 356 | .receive = vhost_vdpa_receive, |
00ef422e EP |
357 | .start = vhost_vdpa_net_data_start, |
358 | .stop = vhost_vdpa_net_client_stop, | |
1e0a84ea CL |
359 | .cleanup = vhost_vdpa_cleanup, |
360 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
361 | .has_ufo = vhost_vdpa_has_ufo, | |
ee8a1c63 | 362 | .check_peer_type = vhost_vdpa_check_peer_type, |
1e0a84ea CL |
363 | }; |
364 | ||
c1a10086 EP |
365 | static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index) |
366 | { | |
367 | struct vhost_vring_state state = { | |
368 | .index = vq_index, | |
369 | }; | |
370 | int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); | |
371 | ||
372 | if (unlikely(r < 0)) { | |
373 | error_report("Cannot get VQ %u group: %s", vq_index, | |
374 | g_strerror(errno)); | |
375 | return r; | |
376 | } | |
377 | ||
378 | return state.num; | |
379 | } | |
380 | ||
381 | static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, | |
382 | unsigned vq_group, | |
383 | unsigned asid_num) | |
384 | { | |
385 | struct vhost_vring_state asid = { | |
386 | .index = vq_group, | |
387 | .num = asid_num, | |
388 | }; | |
389 | int r; | |
390 | ||
391 | r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); | |
392 | if (unlikely(r < 0)) { | |
393 | error_report("Can't set vq group %u asid %u, errno=%d (%s)", | |
394 | asid.index, asid.num, errno, g_strerror(errno)); | |
395 | } | |
396 | return r; | |
397 | } | |
398 | ||
2df4dd31 EP |
399 | static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) |
400 | { | |
401 | VhostIOVATree *tree = v->iova_tree; | |
402 | DMAMap needle = { | |
403 | /* | |
404 | * No need to specify size or to look for more translations since | |
405 | * this contiguous chunk was allocated by us. | |
406 | */ | |
407 | .translated_addr = (hwaddr)(uintptr_t)addr, | |
408 | }; | |
409 | const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); | |
410 | int r; | |
411 | ||
412 | if (unlikely(!map)) { | |
413 | error_report("Cannot locate expected map"); | |
414 | return; | |
415 | } | |
416 | ||
cd831ed5 | 417 | r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); |
2df4dd31 EP |
418 | if (unlikely(r != 0)) { |
419 | error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); | |
420 | } | |
421 | ||
69292a8e | 422 | vhost_iova_tree_remove(tree, *map); |
2df4dd31 EP |
423 | } |
424 | ||
425 | static size_t vhost_vdpa_net_cvq_cmd_len(void) | |
426 | { | |
427 | /* | |
428 | * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. | |
429 | * In buffer is always 1 byte, so it should fit here | |
430 | */ | |
431 | return sizeof(struct virtio_net_ctrl_hdr) + | |
432 | 2 * sizeof(struct virtio_net_ctrl_mac) + | |
433 | MAC_TABLE_ENTRIES * ETH_ALEN; | |
434 | } | |
435 | ||
436 | static size_t vhost_vdpa_net_cvq_cmd_page_len(void) | |
437 | { | |
438 | return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); | |
439 | } | |
440 | ||
7a7f87e9 EP |
441 | /** Map CVQ buffer. */ |
442 | static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, | |
443 | bool write) | |
2df4dd31 EP |
444 | { |
445 | DMAMap map = {}; | |
446 | int r; | |
447 | ||
2df4dd31 | 448 | map.translated_addr = (hwaddr)(uintptr_t)buf; |
7a7f87e9 | 449 | map.size = size - 1; |
2df4dd31 EP |
450 | map.perm = write ? IOMMU_RW : IOMMU_RO, |
451 | r = vhost_iova_tree_map_alloc(v->iova_tree, &map); | |
452 | if (unlikely(r != IOVA_OK)) { | |
453 | error_report("Cannot map injected element"); | |
7a7f87e9 | 454 | return r; |
2df4dd31 EP |
455 | } |
456 | ||
cd831ed5 EP |
457 | r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, |
458 | vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); | |
2df4dd31 EP |
459 | if (unlikely(r < 0)) { |
460 | goto dma_map_err; | |
461 | } | |
462 | ||
7a7f87e9 | 463 | return 0; |
2df4dd31 EP |
464 | |
465 | dma_map_err: | |
69292a8e | 466 | vhost_iova_tree_remove(v->iova_tree, map); |
7a7f87e9 | 467 | return r; |
2df4dd31 EP |
468 | } |
469 | ||
7a7f87e9 | 470 | static int vhost_vdpa_net_cvq_start(NetClientState *nc) |
2df4dd31 | 471 | { |
00ef422e | 472 | VhostVDPAState *s, *s0; |
c1a10086 EP |
473 | struct vhost_vdpa *v; |
474 | uint64_t backend_features; | |
475 | int64_t cvq_group; | |
476 | int cvq_index, r; | |
2df4dd31 | 477 | |
7a7f87e9 EP |
478 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); |
479 | ||
480 | s = DO_UPCAST(VhostVDPAState, nc, nc); | |
c1a10086 EP |
481 | v = &s->vhost_vdpa; |
482 | ||
69498430 EP |
483 | s0 = vhost_vdpa_net_first_nc_vdpa(s); |
484 | v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; | |
c1a10086 EP |
485 | v->shadow_vqs_enabled = s->always_svq; |
486 | s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; | |
487 | ||
69498430 | 488 | if (s->vhost_vdpa.shadow_data) { |
c1a10086 EP |
489 | /* SVQ is already configured for all virtqueues */ |
490 | goto out; | |
491 | } | |
492 | ||
493 | /* | |
494 | * If we early return in these cases SVQ will not be enabled. The migration | |
495 | * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. | |
496 | * | |
497 | * Calling VHOST_GET_BACKEND_FEATURES as they are not available in v->dev | |
498 | * yet. | |
499 | */ | |
500 | r = ioctl(v->device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); | |
501 | if (unlikely(r < 0)) { | |
502 | error_report("Cannot get vdpa backend_features: %s(%d)", | |
503 | g_strerror(errno), errno); | |
504 | return -1; | |
505 | } | |
525ae115 | 506 | if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID)) || |
c1a10086 EP |
507 | !vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { |
508 | return 0; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Check if all the virtqueues of the virtio device are in a different vq | |
513 | * than the last vq. VQ group of last group passed in cvq_group. | |
514 | */ | |
515 | cvq_index = v->dev->vq_index_end - 1; | |
516 | cvq_group = vhost_vdpa_get_vring_group(v->device_fd, cvq_index); | |
517 | if (unlikely(cvq_group < 0)) { | |
518 | return cvq_group; | |
519 | } | |
520 | for (int i = 0; i < cvq_index; ++i) { | |
521 | int64_t group = vhost_vdpa_get_vring_group(v->device_fd, i); | |
522 | ||
523 | if (unlikely(group < 0)) { | |
524 | return group; | |
525 | } | |
526 | ||
527 | if (group == cvq_group) { | |
528 | return 0; | |
529 | } | |
530 | } | |
531 | ||
532 | r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); | |
533 | if (unlikely(r < 0)) { | |
534 | return r; | |
535 | } | |
536 | ||
c1a10086 EP |
537 | v->shadow_vqs_enabled = true; |
538 | s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; | |
539 | ||
540 | out: | |
7a7f87e9 EP |
541 | if (!s->vhost_vdpa.shadow_vqs_enabled) { |
542 | return 0; | |
2df4dd31 EP |
543 | } |
544 | ||
00ef422e EP |
545 | if (s0->vhost_vdpa.iova_tree) { |
546 | /* | |
547 | * SVQ is already configured for all virtqueues. Reuse IOVA tree for | |
548 | * simplicity, whether CVQ shares ASID with guest or not, because: | |
549 | * - Memory listener need access to guest's memory addresses allocated | |
550 | * in the IOVA tree. | |
551 | * - There should be plenty of IOVA address space for both ASID not to | |
552 | * worry about collisions between them. Guest's translations are | |
553 | * still validated with virtio virtqueue_pop so there is no risk for | |
554 | * the guest to access memory that it shouldn't. | |
555 | * | |
556 | * To allocate a iova tree per ASID is doable but it complicates the | |
557 | * code and it is not worth it for the moment. | |
558 | */ | |
559 | v->iova_tree = s0->vhost_vdpa.iova_tree; | |
560 | } else { | |
561 | v->iova_tree = vhost_iova_tree_new(v->iova_range.first, | |
562 | v->iova_range.last); | |
563 | } | |
564 | ||
7a7f87e9 EP |
565 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, |
566 | vhost_vdpa_net_cvq_cmd_page_len(), false); | |
567 | if (unlikely(r < 0)) { | |
568 | return r; | |
569 | } | |
570 | ||
17fb889f | 571 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, |
7a7f87e9 EP |
572 | vhost_vdpa_net_cvq_cmd_page_len(), true); |
573 | if (unlikely(r < 0)) { | |
2df4dd31 | 574 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); |
2df4dd31 EP |
575 | } |
576 | ||
7a7f87e9 EP |
577 | return r; |
578 | } | |
579 | ||
580 | static void vhost_vdpa_net_cvq_stop(NetClientState *nc) | |
581 | { | |
582 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
583 | ||
584 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
585 | ||
586 | if (s->vhost_vdpa.shadow_vqs_enabled) { | |
587 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); | |
17fb889f | 588 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); |
7a7f87e9 | 589 | } |
00ef422e EP |
590 | |
591 | vhost_vdpa_net_client_stop(nc); | |
2df4dd31 EP |
592 | } |
593 | ||
be4278b6 EP |
594 | static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, |
595 | size_t in_len) | |
596 | { | |
597 | /* Buffers for the device */ | |
598 | const struct iovec out = { | |
599 | .iov_base = s->cvq_cmd_out_buffer, | |
600 | .iov_len = out_len, | |
601 | }; | |
602 | const struct iovec in = { | |
17fb889f | 603 | .iov_base = s->status, |
be4278b6 EP |
604 | .iov_len = sizeof(virtio_net_ctrl_ack), |
605 | }; | |
606 | VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); | |
607 | int r; | |
608 | ||
609 | r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); | |
610 | if (unlikely(r != 0)) { | |
611 | if (unlikely(r == -ENOSPC)) { | |
612 | qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", | |
613 | __func__); | |
614 | } | |
615 | return r; | |
616 | } | |
617 | ||
618 | /* | |
619 | * We can poll here since we've had BQL from the time we sent the | |
620 | * descriptor. Also, we need to take the answer before SVQ pulls by itself, | |
621 | * when BQL is released | |
622 | */ | |
623 | return vhost_svq_poll(svq); | |
624 | } | |
625 | ||
f73c0c43 EP |
626 | static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, |
627 | uint8_t cmd, const void *data, | |
628 | size_t data_size) | |
629 | { | |
630 | const struct virtio_net_ctrl_hdr ctrl = { | |
631 | .class = class, | |
632 | .cmd = cmd, | |
633 | }; | |
634 | ||
635 | assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); | |
636 | ||
637 | memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); | |
638 | memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); | |
639 | ||
640 | return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, | |
641 | sizeof(virtio_net_ctrl_ack)); | |
642 | } | |
643 | ||
644 | static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) | |
645 | { | |
646 | uint64_t features = n->parent_obj.guest_features; | |
647 | if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { | |
648 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, | |
649 | VIRTIO_NET_CTRL_MAC_ADDR_SET, | |
650 | n->mac, sizeof(n->mac)); | |
651 | if (unlikely(dev_written < 0)) { | |
652 | return dev_written; | |
653 | } | |
654 | ||
655 | return *s->status != VIRTIO_NET_OK; | |
656 | } | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
f64c7cda EP |
661 | static int vhost_vdpa_net_load_mq(VhostVDPAState *s, |
662 | const VirtIONet *n) | |
663 | { | |
664 | struct virtio_net_ctrl_mq mq; | |
665 | uint64_t features = n->parent_obj.guest_features; | |
666 | ssize_t dev_written; | |
667 | ||
668 | if (!(features & BIT_ULL(VIRTIO_NET_F_MQ))) { | |
669 | return 0; | |
670 | } | |
671 | ||
672 | mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); | |
673 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, | |
674 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, | |
675 | sizeof(mq)); | |
676 | if (unlikely(dev_written < 0)) { | |
677 | return dev_written; | |
678 | } | |
679 | ||
680 | return *s->status != VIRTIO_NET_OK; | |
681 | } | |
682 | ||
dd036d8d EP |
683 | static int vhost_vdpa_net_load(NetClientState *nc) |
684 | { | |
685 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
f73c0c43 | 686 | struct vhost_vdpa *v = &s->vhost_vdpa; |
dd036d8d | 687 | const VirtIONet *n; |
f73c0c43 | 688 | int r; |
dd036d8d EP |
689 | |
690 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
691 | ||
692 | if (!v->shadow_vqs_enabled) { | |
693 | return 0; | |
694 | } | |
695 | ||
696 | n = VIRTIO_NET(v->dev->vdev); | |
f73c0c43 EP |
697 | r = vhost_vdpa_net_load_mac(s, n); |
698 | if (unlikely(r < 0)) { | |
699 | return r; | |
dd036d8d | 700 | } |
f64c7cda EP |
701 | r = vhost_vdpa_net_load_mq(s, n); |
702 | if (unlikely(r)) { | |
703 | return r; | |
704 | } | |
dd036d8d EP |
705 | |
706 | return 0; | |
707 | } | |
708 | ||
f8972b56 EP |
709 | static NetClientInfo net_vhost_vdpa_cvq_info = { |
710 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
711 | .size = sizeof(VhostVDPAState), | |
712 | .receive = vhost_vdpa_receive, | |
7a7f87e9 | 713 | .start = vhost_vdpa_net_cvq_start, |
dd036d8d | 714 | .load = vhost_vdpa_net_load, |
7a7f87e9 | 715 | .stop = vhost_vdpa_net_cvq_stop, |
f8972b56 EP |
716 | .cleanup = vhost_vdpa_cleanup, |
717 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
718 | .has_ufo = vhost_vdpa_has_ufo, | |
719 | .check_peer_type = vhost_vdpa_check_peer_type, | |
720 | }; | |
721 | ||
2df4dd31 EP |
722 | /** |
723 | * Validate and copy control virtqueue commands. | |
724 | * | |
725 | * Following QEMU guidelines, we offer a copy of the buffers to the device to | |
726 | * prevent TOCTOU bugs. | |
bd907ae4 EP |
727 | */ |
728 | static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, | |
729 | VirtQueueElement *elem, | |
730 | void *opaque) | |
731 | { | |
2df4dd31 | 732 | VhostVDPAState *s = opaque; |
be4278b6 | 733 | size_t in_len; |
bd907ae4 | 734 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
7a7f87e9 EP |
735 | /* Out buffer sent to both the vdpa device and the device model */ |
736 | struct iovec out = { | |
737 | .iov_base = s->cvq_cmd_out_buffer, | |
738 | }; | |
2df4dd31 EP |
739 | /* in buffer used for device model */ |
740 | const struct iovec in = { | |
741 | .iov_base = &status, | |
742 | .iov_len = sizeof(status), | |
743 | }; | |
be4278b6 | 744 | ssize_t dev_written = -EINVAL; |
2df4dd31 | 745 | |
7a7f87e9 EP |
746 | out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, |
747 | s->cvq_cmd_out_buffer, | |
748 | vhost_vdpa_net_cvq_cmd_len()); | |
3f9a3eeb EP |
749 | if (*(uint8_t *)s->cvq_cmd_out_buffer == VIRTIO_NET_CTRL_ANNOUNCE) { |
750 | /* | |
751 | * Guest announce capability is emulated by qemu, so don't forward to | |
752 | * the device. | |
753 | */ | |
754 | dev_written = sizeof(status); | |
755 | *s->status = VIRTIO_NET_OK; | |
756 | } else { | |
757 | dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); | |
758 | if (unlikely(dev_written < 0)) { | |
759 | goto out; | |
760 | } | |
bd907ae4 EP |
761 | } |
762 | ||
bd907ae4 EP |
763 | if (unlikely(dev_written < sizeof(status))) { |
764 | error_report("Insufficient written data (%zu)", dev_written); | |
2df4dd31 EP |
765 | goto out; |
766 | } | |
767 | ||
17fb889f | 768 | if (*s->status != VIRTIO_NET_OK) { |
be4278b6 | 769 | return VIRTIO_NET_ERR; |
2df4dd31 EP |
770 | } |
771 | ||
772 | status = VIRTIO_NET_ERR; | |
7a7f87e9 | 773 | virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); |
2df4dd31 EP |
774 | if (status != VIRTIO_NET_OK) { |
775 | error_report("Bad CVQ processing in model"); | |
bd907ae4 EP |
776 | } |
777 | ||
778 | out: | |
779 | in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, | |
780 | sizeof(status)); | |
781 | if (unlikely(in_len < sizeof(status))) { | |
782 | error_report("Bad device CVQ written length"); | |
783 | } | |
784 | vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); | |
785 | g_free(elem); | |
be4278b6 | 786 | return dev_written < 0 ? dev_written : 0; |
bd907ae4 EP |
787 | } |
788 | ||
789 | static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { | |
790 | .avail_handler = vhost_vdpa_net_handle_ctrl_avail, | |
791 | }; | |
792 | ||
654790b6 | 793 | static NetClientState *net_vhost_vdpa_init(NetClientState *peer, |
a585fad2 EP |
794 | const char *device, |
795 | const char *name, | |
796 | int vdpa_device_fd, | |
797 | int queue_pair_index, | |
798 | int nvqs, | |
799 | bool is_datapath, | |
800 | bool svq, | |
5c1ebd4c EP |
801 | struct vhost_vdpa_iova_range iova_range, |
802 | uint64_t features) | |
1e0a84ea CL |
803 | { |
804 | NetClientState *nc = NULL; | |
805 | VhostVDPAState *s; | |
1e0a84ea CL |
806 | int ret = 0; |
807 | assert(name); | |
40237840 JW |
808 | if (is_datapath) { |
809 | nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, | |
810 | name); | |
811 | } else { | |
f8972b56 | 812 | nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, |
40237840 JW |
813 | device, name); |
814 | } | |
53b85d95 | 815 | qemu_set_info_str(nc, TYPE_VHOST_VDPA); |
1e0a84ea | 816 | s = DO_UPCAST(VhostVDPAState, nc, nc); |
7327813d | 817 | |
1e0a84ea | 818 | s->vhost_vdpa.device_fd = vdpa_device_fd; |
40237840 | 819 | s->vhost_vdpa.index = queue_pair_index; |
7f211a28 | 820 | s->always_svq = svq; |
69498430 | 821 | s->migration_state.notify = vdpa_net_migration_state_notifier; |
1576dbb5 | 822 | s->vhost_vdpa.shadow_vqs_enabled = svq; |
a585fad2 | 823 | s->vhost_vdpa.iova_range = iova_range; |
6188d78a | 824 | s->vhost_vdpa.shadow_data = svq; |
5c1ebd4c EP |
825 | if (queue_pair_index == 0) { |
826 | vhost_vdpa_net_valid_svq_features(features, | |
827 | &s->vhost_vdpa.migration_blocker); | |
828 | } else if (!is_datapath) { | |
2df4dd31 EP |
829 | s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(), |
830 | vhost_vdpa_net_cvq_cmd_page_len()); | |
831 | memset(s->cvq_cmd_out_buffer, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
17fb889f EP |
832 | s->status = qemu_memalign(qemu_real_host_page_size(), |
833 | vhost_vdpa_net_cvq_cmd_page_len()); | |
834 | memset(s->status, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
2df4dd31 | 835 | |
bd907ae4 EP |
836 | s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; |
837 | s->vhost_vdpa.shadow_vq_ops_opaque = s; | |
9c363cf6 EP |
838 | |
839 | /* | |
840 | * TODO: We cannot migrate devices with CVQ as there is no way to set | |
841 | * the device state (MAC, MQ, etc) before starting the datapath. | |
842 | * | |
843 | * Migration blocker ownership now belongs to s->vhost_vdpa. | |
844 | */ | |
845 | error_setg(&s->vhost_vdpa.migration_blocker, | |
846 | "net vdpa cannot migrate with CVQ feature"); | |
bd907ae4 | 847 | } |
40237840 | 848 | ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); |
74af5eec | 849 | if (ret) { |
74af5eec | 850 | qemu_del_net_client(nc); |
654790b6 | 851 | return NULL; |
74af5eec | 852 | } |
654790b6 | 853 | return nc; |
1e0a84ea CL |
854 | } |
855 | ||
8170ab3f EP |
856 | static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) |
857 | { | |
858 | int ret = ioctl(fd, VHOST_GET_FEATURES, features); | |
859 | if (unlikely(ret < 0)) { | |
860 | error_setg_errno(errp, errno, | |
861 | "Fail to query features from vhost-vDPA device"); | |
862 | } | |
863 | return ret; | |
864 | } | |
865 | ||
866 | static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, | |
867 | int *has_cvq, Error **errp) | |
40237840 JW |
868 | { |
869 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); | |
cd523a41 | 870 | g_autofree struct vhost_vdpa_config *config = NULL; |
40237840 | 871 | __virtio16 *max_queue_pairs; |
40237840 JW |
872 | int ret; |
873 | ||
40237840 JW |
874 | if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { |
875 | *has_cvq = 1; | |
876 | } else { | |
877 | *has_cvq = 0; | |
878 | } | |
879 | ||
880 | if (features & (1 << VIRTIO_NET_F_MQ)) { | |
881 | config = g_malloc0(config_size + sizeof(*max_queue_pairs)); | |
882 | config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); | |
883 | config->len = sizeof(*max_queue_pairs); | |
884 | ||
885 | ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); | |
886 | if (ret) { | |
887 | error_setg(errp, "Fail to get config from vhost-vDPA device"); | |
888 | return -ret; | |
889 | } | |
890 | ||
891 | max_queue_pairs = (__virtio16 *)&config->buf; | |
892 | ||
893 | return lduw_le_p(max_queue_pairs); | |
894 | } | |
895 | ||
896 | return 1; | |
897 | } | |
898 | ||
1e0a84ea CL |
899 | int net_init_vhost_vdpa(const Netdev *netdev, const char *name, |
900 | NetClientState *peer, Error **errp) | |
901 | { | |
902 | const NetdevVhostVDPAOptions *opts; | |
8170ab3f | 903 | uint64_t features; |
654790b6 | 904 | int vdpa_device_fd; |
eb3cb751 | 905 | g_autofree NetClientState **ncs = NULL; |
a585fad2 | 906 | struct vhost_vdpa_iova_range iova_range; |
eb3cb751 | 907 | NetClientState *nc; |
aed5da45 | 908 | int queue_pairs, r, i = 0, has_cvq = 0; |
1e0a84ea CL |
909 | |
910 | assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
911 | opts = &netdev->u.vhost_vdpa; | |
7480874a | 912 | if (!opts->vhostdev && !opts->vhostfd) { |
8801ccd0 SWL |
913 | error_setg(errp, |
914 | "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); | |
c8295404 EP |
915 | return -1; |
916 | } | |
7327813d | 917 | |
7480874a | 918 | if (opts->vhostdev && opts->vhostfd) { |
8801ccd0 SWL |
919 | error_setg(errp, |
920 | "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); | |
921 | return -1; | |
922 | } | |
923 | ||
7480874a | 924 | if (opts->vhostdev) { |
8801ccd0 SWL |
925 | vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); |
926 | if (vdpa_device_fd == -1) { | |
927 | return -errno; | |
928 | } | |
5107fd3e PM |
929 | } else { |
930 | /* has_vhostfd */ | |
8801ccd0 SWL |
931 | vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); |
932 | if (vdpa_device_fd == -1) { | |
933 | error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); | |
934 | return -1; | |
935 | } | |
7327813d JW |
936 | } |
937 | ||
8170ab3f EP |
938 | r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); |
939 | if (unlikely(r < 0)) { | |
aed5da45 | 940 | goto err; |
8170ab3f EP |
941 | } |
942 | ||
943 | queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, | |
40237840 JW |
944 | &has_cvq, errp); |
945 | if (queue_pairs < 0) { | |
7327813d | 946 | qemu_close(vdpa_device_fd); |
40237840 JW |
947 | return queue_pairs; |
948 | } | |
949 | ||
bf7a2ad8 LM |
950 | r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); |
951 | if (unlikely(r < 0)) { | |
952 | error_setg(errp, "vhost-vdpa: get iova range failed: %s", | |
953 | strerror(-r)); | |
954 | goto err; | |
955 | } | |
956 | ||
00ef422e EP |
957 | if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { |
958 | goto err; | |
1576dbb5 EP |
959 | } |
960 | ||
40237840 JW |
961 | ncs = g_malloc0(sizeof(*ncs) * queue_pairs); |
962 | ||
963 | for (i = 0; i < queue_pairs; i++) { | |
964 | ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 965 | vdpa_device_fd, i, 2, true, opts->x_svq, |
5c1ebd4c | 966 | iova_range, features); |
40237840 JW |
967 | if (!ncs[i]) |
968 | goto err; | |
7327813d JW |
969 | } |
970 | ||
40237840 JW |
971 | if (has_cvq) { |
972 | nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 973 | vdpa_device_fd, i, 1, false, |
5c1ebd4c | 974 | opts->x_svq, iova_range, features); |
40237840 JW |
975 | if (!nc) |
976 | goto err; | |
977 | } | |
978 | ||
654790b6 | 979 | return 0; |
40237840 JW |
980 | |
981 | err: | |
982 | if (i) { | |
9bd05507 SWL |
983 | for (i--; i >= 0; i--) { |
984 | qemu_del_net_client(ncs[i]); | |
985 | } | |
40237840 | 986 | } |
1576dbb5 | 987 | |
40237840 | 988 | qemu_close(vdpa_device_fd); |
40237840 JW |
989 | |
990 | return -1; | |
1e0a84ea | 991 | } |