]>
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; | |
152128d6 EP |
46 | |
47 | /* The device can isolate CVQ in its own ASID */ | |
48 | bool cvq_isolated; | |
49 | ||
1e0a84ea CL |
50 | bool started; |
51 | } VhostVDPAState; | |
52 | ||
2875a0ca HJ |
53 | /* |
54 | * The array is sorted alphabetically in ascending order, | |
55 | * with the exception of VHOST_INVALID_FEATURE_BIT, | |
56 | * which should always be the last entry. | |
57 | */ | |
1e0a84ea | 58 | const int vdpa_feature_bits[] = { |
1e0a84ea | 59 | VIRTIO_F_ANY_LAYOUT, |
2875a0ca HJ |
60 | VIRTIO_F_IOMMU_PLATFORM, |
61 | VIRTIO_F_NOTIFY_ON_EMPTY, | |
62 | VIRTIO_F_RING_PACKED, | |
63 | VIRTIO_F_RING_RESET, | |
1e0a84ea CL |
64 | VIRTIO_F_VERSION_1, |
65 | VIRTIO_NET_F_CSUM, | |
51e84244 | 66 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, |
2875a0ca HJ |
67 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
68 | VIRTIO_NET_F_CTRL_RX, | |
69 | VIRTIO_NET_F_CTRL_RX_EXTRA, | |
70 | VIRTIO_NET_F_CTRL_VLAN, | |
71 | VIRTIO_NET_F_CTRL_VQ, | |
1e0a84ea | 72 | VIRTIO_NET_F_GSO, |
2875a0ca HJ |
73 | VIRTIO_NET_F_GUEST_CSUM, |
74 | VIRTIO_NET_F_GUEST_ECN, | |
1e0a84ea CL |
75 | VIRTIO_NET_F_GUEST_TSO4, |
76 | VIRTIO_NET_F_GUEST_TSO6, | |
1e0a84ea | 77 | VIRTIO_NET_F_GUEST_UFO, |
2875a0ca HJ |
78 | VIRTIO_NET_F_HASH_REPORT, |
79 | VIRTIO_NET_F_HOST_ECN, | |
1e0a84ea CL |
80 | VIRTIO_NET_F_HOST_TSO4, |
81 | VIRTIO_NET_F_HOST_TSO6, | |
1e0a84ea | 82 | VIRTIO_NET_F_HOST_UFO, |
2875a0ca | 83 | VIRTIO_NET_F_MQ, |
1e0a84ea CL |
84 | VIRTIO_NET_F_MRG_RXBUF, |
85 | VIRTIO_NET_F_MTU, | |
0145c393 | 86 | VIRTIO_NET_F_RSS, |
9aa47edd | 87 | VIRTIO_NET_F_STATUS, |
2875a0ca HJ |
88 | VIRTIO_RING_F_EVENT_IDX, |
89 | VIRTIO_RING_F_INDIRECT_DESC, | |
90 | ||
91 | /* VHOST_INVALID_FEATURE_BIT should always be the last entry */ | |
1e0a84ea CL |
92 | VHOST_INVALID_FEATURE_BIT |
93 | }; | |
94 | ||
1576dbb5 EP |
95 | /** Supported device specific feature bits with SVQ */ |
96 | static const uint64_t vdpa_svq_device_features = | |
97 | BIT_ULL(VIRTIO_NET_F_CSUM) | | |
98 | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | | |
4b4a1378 | 99 | BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | |
1576dbb5 EP |
100 | BIT_ULL(VIRTIO_NET_F_MTU) | |
101 | BIT_ULL(VIRTIO_NET_F_MAC) | | |
102 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | | |
103 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | | |
104 | BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | | |
105 | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | | |
106 | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | | |
107 | BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | | |
108 | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | | |
109 | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | | |
110 | BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | | |
111 | BIT_ULL(VIRTIO_NET_F_STATUS) | | |
112 | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | | |
ea6eec49 | 113 | BIT_ULL(VIRTIO_NET_F_CTRL_RX) | |
d669b7bb | 114 | BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA) | |
72b99a87 | 115 | BIT_ULL(VIRTIO_NET_F_MQ) | |
1576dbb5 EP |
116 | BIT_ULL(VIRTIO_F_ANY_LAYOUT) | |
117 | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | | |
609ab4c3 EP |
118 | /* VHOST_F_LOG_ALL is exposed by SVQ */ |
119 | BIT_ULL(VHOST_F_LOG_ALL) | | |
1576dbb5 | 120 | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | |
0d74e2b7 EP |
121 | BIT_ULL(VIRTIO_NET_F_STANDBY) | |
122 | BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); | |
1576dbb5 | 123 | |
c1a10086 EP |
124 | #define VHOST_VDPA_NET_CVQ_ASID 1 |
125 | ||
1e0a84ea CL |
126 | VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) |
127 | { | |
128 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
129 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
130 | return s->vhost_net; | |
131 | } | |
132 | ||
915bf6cc EP |
133 | static size_t vhost_vdpa_net_cvq_cmd_len(void) |
134 | { | |
135 | /* | |
136 | * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. | |
137 | * In buffer is always 1 byte, so it should fit here | |
138 | */ | |
139 | return sizeof(struct virtio_net_ctrl_hdr) + | |
140 | 2 * sizeof(struct virtio_net_ctrl_mac) + | |
141 | MAC_TABLE_ENTRIES * ETH_ALEN; | |
142 | } | |
143 | ||
144 | static size_t vhost_vdpa_net_cvq_cmd_page_len(void) | |
145 | { | |
146 | return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); | |
147 | } | |
148 | ||
36e46472 EP |
149 | static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) |
150 | { | |
151 | uint64_t invalid_dev_features = | |
152 | features & ~vdpa_svq_device_features & | |
153 | /* Transport are all accepted at this point */ | |
154 | ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, | |
155 | VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); | |
156 | ||
157 | if (invalid_dev_features) { | |
158 | error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, | |
159 | invalid_dev_features); | |
258a0394 | 160 | return false; |
36e46472 EP |
161 | } |
162 | ||
258a0394 | 163 | return vhost_svq_valid_features(features, errp); |
36e46472 EP |
164 | } |
165 | ||
1e0a84ea CL |
166 | static int vhost_vdpa_net_check_device_id(struct vhost_net *net) |
167 | { | |
168 | uint32_t device_id; | |
169 | int ret; | |
170 | struct vhost_dev *hdev; | |
171 | ||
172 | hdev = (struct vhost_dev *)&net->dev; | |
173 | ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); | |
174 | if (device_id != VIRTIO_ID_NET) { | |
175 | return -ENOTSUP; | |
176 | } | |
177 | return ret; | |
178 | } | |
179 | ||
40237840 JW |
180 | static int vhost_vdpa_add(NetClientState *ncs, void *be, |
181 | int queue_pair_index, int nvqs) | |
1e0a84ea CL |
182 | { |
183 | VhostNetOptions options; | |
184 | struct vhost_net *net = NULL; | |
185 | VhostVDPAState *s; | |
186 | int ret; | |
187 | ||
188 | options.backend_type = VHOST_BACKEND_TYPE_VDPA; | |
189 | assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
190 | s = DO_UPCAST(VhostVDPAState, nc, ncs); | |
191 | options.net_backend = ncs; | |
192 | options.opaque = be; | |
193 | options.busyloop_timeout = 0; | |
40237840 | 194 | options.nvqs = nvqs; |
1e0a84ea CL |
195 | |
196 | net = vhost_net_init(&options); | |
197 | if (!net) { | |
198 | error_report("failed to init vhost_net for queue"); | |
a97ef87a | 199 | goto err_init; |
1e0a84ea | 200 | } |
1e0a84ea CL |
201 | s->vhost_net = net; |
202 | ret = vhost_vdpa_net_check_device_id(net); | |
203 | if (ret) { | |
a97ef87a | 204 | goto err_check; |
1e0a84ea CL |
205 | } |
206 | return 0; | |
a97ef87a JW |
207 | err_check: |
208 | vhost_net_cleanup(net); | |
209 | g_free(net); | |
210 | err_init: | |
1e0a84ea CL |
211 | return -1; |
212 | } | |
213 | ||
214 | static void vhost_vdpa_cleanup(NetClientState *nc) | |
215 | { | |
216 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
217 | ||
a0d7215e AS |
218 | /* |
219 | * If a peer NIC is attached, do not cleanup anything. | |
220 | * Cleanup will happen as a part of qemu_cleanup() -> net_cleanup() | |
221 | * when the guest is shutting down. | |
222 | */ | |
223 | if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { | |
224 | return; | |
225 | } | |
babf8b87 EP |
226 | munmap(s->cvq_cmd_out_buffer, vhost_vdpa_net_cvq_cmd_page_len()); |
227 | munmap(s->status, vhost_vdpa_net_cvq_cmd_page_len()); | |
1e0a84ea CL |
228 | if (s->vhost_net) { |
229 | vhost_net_cleanup(s->vhost_net); | |
230 | g_free(s->vhost_net); | |
231 | s->vhost_net = NULL; | |
232 | } | |
57b3a7d8 CL |
233 | if (s->vhost_vdpa.device_fd >= 0) { |
234 | qemu_close(s->vhost_vdpa.device_fd); | |
235 | s->vhost_vdpa.device_fd = -1; | |
236 | } | |
1e0a84ea CL |
237 | } |
238 | ||
239 | static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) | |
240 | { | |
241 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
242 | ||
243 | return true; | |
244 | } | |
245 | ||
246 | static bool vhost_vdpa_has_ufo(NetClientState *nc) | |
247 | { | |
248 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
249 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
250 | uint64_t features = 0; | |
251 | features |= (1ULL << VIRTIO_NET_F_HOST_UFO); | |
252 | features = vhost_net_get_features(s->vhost_net, features); | |
253 | return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); | |
254 | ||
255 | } | |
256 | ||
ee8a1c63 KW |
257 | static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, |
258 | Error **errp) | |
259 | { | |
260 | const char *driver = object_class_get_name(oc); | |
261 | ||
262 | if (!g_str_has_prefix(driver, "virtio-net-")) { | |
263 | error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); | |
264 | return false; | |
265 | } | |
266 | ||
267 | return true; | |
268 | } | |
269 | ||
846a1e85 EP |
270 | /** Dummy receive in case qemu falls back to userland tap networking */ |
271 | static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, | |
272 | size_t size) | |
273 | { | |
bc5add1d | 274 | return size; |
846a1e85 EP |
275 | } |
276 | ||
00ef422e EP |
277 | /** From any vdpa net client, get the netclient of the first queue pair */ |
278 | static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) | |
279 | { | |
280 | NICState *nic = qemu_get_nic(s->nc.peer); | |
281 | NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); | |
282 | ||
283 | return DO_UPCAST(VhostVDPAState, nc, nc0); | |
284 | } | |
285 | ||
69498430 EP |
286 | static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) |
287 | { | |
288 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
289 | VirtIONet *n; | |
290 | VirtIODevice *vdev; | |
291 | int data_queue_pairs, cvq, r; | |
292 | ||
293 | /* We are only called on the first data vqs and only if x-svq is not set */ | |
294 | if (s->vhost_vdpa.shadow_vqs_enabled == enable) { | |
295 | return; | |
296 | } | |
297 | ||
298 | vdev = v->dev->vdev; | |
299 | n = VIRTIO_NET(vdev); | |
300 | if (!n->vhost_started) { | |
301 | return; | |
302 | } | |
303 | ||
304 | data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; | |
305 | cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? | |
306 | n->max_ncs - n->max_queue_pairs : 0; | |
307 | /* | |
308 | * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter | |
309 | * in the future and resume the device if read-only operations between | |
310 | * suspend and reset goes wrong. | |
311 | */ | |
312 | vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); | |
313 | ||
314 | /* Start will check migration setup_or_active to configure or not SVQ */ | |
315 | r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); | |
316 | if (unlikely(r < 0)) { | |
317 | error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); | |
318 | } | |
319 | } | |
320 | ||
321 | static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) | |
322 | { | |
323 | MigrationState *migration = data; | |
324 | VhostVDPAState *s = container_of(notifier, VhostVDPAState, | |
325 | migration_state); | |
326 | ||
327 | if (migration_in_setup(migration)) { | |
328 | vhost_vdpa_net_log_global_enable(s, true); | |
329 | } else if (migration_has_failed(migration)) { | |
330 | vhost_vdpa_net_log_global_enable(s, false); | |
331 | } | |
332 | } | |
333 | ||
00ef422e EP |
334 | static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) |
335 | { | |
336 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
337 | ||
69498430 | 338 | add_migration_state_change_notifier(&s->migration_state); |
00ef422e EP |
339 | if (v->shadow_vqs_enabled) { |
340 | v->iova_tree = vhost_iova_tree_new(v->iova_range.first, | |
341 | v->iova_range.last); | |
342 | } | |
343 | } | |
344 | ||
345 | static int vhost_vdpa_net_data_start(NetClientState *nc) | |
346 | { | |
347 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
348 | struct vhost_vdpa *v = &s->vhost_vdpa; | |
349 | ||
350 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
351 | ||
69498430 EP |
352 | if (s->always_svq || |
353 | migration_is_setup_or_active(migrate_get_current()->state)) { | |
354 | v->shadow_vqs_enabled = true; | |
355 | v->shadow_data = true; | |
356 | } else { | |
357 | v->shadow_vqs_enabled = false; | |
358 | v->shadow_data = false; | |
359 | } | |
360 | ||
00ef422e EP |
361 | if (v->index == 0) { |
362 | vhost_vdpa_net_data_start_first(s); | |
363 | return 0; | |
364 | } | |
365 | ||
366 | if (v->shadow_vqs_enabled) { | |
367 | VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); | |
368 | v->iova_tree = s0->vhost_vdpa.iova_tree; | |
369 | } | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static void vhost_vdpa_net_client_stop(NetClientState *nc) | |
375 | { | |
376 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
377 | struct vhost_dev *dev; | |
378 | ||
379 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
380 | ||
69498430 EP |
381 | if (s->vhost_vdpa.index == 0) { |
382 | remove_migration_state_change_notifier(&s->migration_state); | |
383 | } | |
384 | ||
00ef422e EP |
385 | dev = s->vhost_vdpa.dev; |
386 | if (dev->vq_index + dev->nvqs == dev->vq_index_end) { | |
387 | g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); | |
388 | } | |
389 | } | |
390 | ||
1e0a84ea CL |
391 | static NetClientInfo net_vhost_vdpa_info = { |
392 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
393 | .size = sizeof(VhostVDPAState), | |
846a1e85 | 394 | .receive = vhost_vdpa_receive, |
00ef422e EP |
395 | .start = vhost_vdpa_net_data_start, |
396 | .stop = vhost_vdpa_net_client_stop, | |
1e0a84ea CL |
397 | .cleanup = vhost_vdpa_cleanup, |
398 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
399 | .has_ufo = vhost_vdpa_has_ufo, | |
ee8a1c63 | 400 | .check_peer_type = vhost_vdpa_check_peer_type, |
1e0a84ea CL |
401 | }; |
402 | ||
152128d6 EP |
403 | static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, |
404 | Error **errp) | |
c1a10086 EP |
405 | { |
406 | struct vhost_vring_state state = { | |
407 | .index = vq_index, | |
408 | }; | |
409 | int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); | |
410 | ||
411 | if (unlikely(r < 0)) { | |
0f2bb0bf | 412 | r = -errno; |
152128d6 | 413 | error_setg_errno(errp, errno, "Cannot get VQ %u group", vq_index); |
c1a10086 EP |
414 | return r; |
415 | } | |
416 | ||
417 | return state.num; | |
418 | } | |
419 | ||
420 | static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, | |
421 | unsigned vq_group, | |
422 | unsigned asid_num) | |
423 | { | |
424 | struct vhost_vring_state asid = { | |
425 | .index = vq_group, | |
426 | .num = asid_num, | |
427 | }; | |
428 | int r; | |
429 | ||
430 | r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); | |
431 | if (unlikely(r < 0)) { | |
432 | error_report("Can't set vq group %u asid %u, errno=%d (%s)", | |
433 | asid.index, asid.num, errno, g_strerror(errno)); | |
434 | } | |
435 | return r; | |
436 | } | |
437 | ||
2df4dd31 EP |
438 | static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) |
439 | { | |
440 | VhostIOVATree *tree = v->iova_tree; | |
441 | DMAMap needle = { | |
442 | /* | |
443 | * No need to specify size or to look for more translations since | |
444 | * this contiguous chunk was allocated by us. | |
445 | */ | |
446 | .translated_addr = (hwaddr)(uintptr_t)addr, | |
447 | }; | |
448 | const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); | |
449 | int r; | |
450 | ||
451 | if (unlikely(!map)) { | |
452 | error_report("Cannot locate expected map"); | |
453 | return; | |
454 | } | |
455 | ||
cd831ed5 | 456 | r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); |
2df4dd31 EP |
457 | if (unlikely(r != 0)) { |
458 | error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); | |
459 | } | |
460 | ||
69292a8e | 461 | vhost_iova_tree_remove(tree, *map); |
2df4dd31 EP |
462 | } |
463 | ||
7a7f87e9 EP |
464 | /** Map CVQ buffer. */ |
465 | static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, | |
466 | bool write) | |
2df4dd31 EP |
467 | { |
468 | DMAMap map = {}; | |
469 | int r; | |
470 | ||
2df4dd31 | 471 | map.translated_addr = (hwaddr)(uintptr_t)buf; |
7a7f87e9 | 472 | map.size = size - 1; |
2df4dd31 EP |
473 | map.perm = write ? IOMMU_RW : IOMMU_RO, |
474 | r = vhost_iova_tree_map_alloc(v->iova_tree, &map); | |
475 | if (unlikely(r != IOVA_OK)) { | |
476 | error_report("Cannot map injected element"); | |
7a7f87e9 | 477 | return r; |
2df4dd31 EP |
478 | } |
479 | ||
cd831ed5 EP |
480 | r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, |
481 | vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); | |
2df4dd31 EP |
482 | if (unlikely(r < 0)) { |
483 | goto dma_map_err; | |
484 | } | |
485 | ||
7a7f87e9 | 486 | return 0; |
2df4dd31 EP |
487 | |
488 | dma_map_err: | |
69292a8e | 489 | vhost_iova_tree_remove(v->iova_tree, map); |
7a7f87e9 | 490 | return r; |
2df4dd31 EP |
491 | } |
492 | ||
7a7f87e9 | 493 | static int vhost_vdpa_net_cvq_start(NetClientState *nc) |
2df4dd31 | 494 | { |
00ef422e | 495 | VhostVDPAState *s, *s0; |
c1a10086 | 496 | struct vhost_vdpa *v; |
c1a10086 | 497 | int64_t cvq_group; |
152128d6 EP |
498 | int r; |
499 | Error *err = NULL; | |
2df4dd31 | 500 | |
7a7f87e9 EP |
501 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); |
502 | ||
503 | s = DO_UPCAST(VhostVDPAState, nc, nc); | |
c1a10086 EP |
504 | v = &s->vhost_vdpa; |
505 | ||
69498430 EP |
506 | s0 = vhost_vdpa_net_first_nc_vdpa(s); |
507 | v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; | |
c1a10086 EP |
508 | v->shadow_vqs_enabled = s->always_svq; |
509 | s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; | |
510 | ||
69498430 | 511 | if (s->vhost_vdpa.shadow_data) { |
c1a10086 EP |
512 | /* SVQ is already configured for all virtqueues */ |
513 | goto out; | |
514 | } | |
515 | ||
516 | /* | |
517 | * If we early return in these cases SVQ will not be enabled. The migration | |
518 | * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. | |
c1a10086 | 519 | */ |
152128d6 EP |
520 | if (!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { |
521 | return 0; | |
c1a10086 | 522 | } |
152128d6 EP |
523 | |
524 | if (!s->cvq_isolated) { | |
c1a10086 EP |
525 | return 0; |
526 | } | |
527 | ||
152128d6 EP |
528 | cvq_group = vhost_vdpa_get_vring_group(v->device_fd, |
529 | v->dev->vq_index_end - 1, | |
530 | &err); | |
c1a10086 | 531 | if (unlikely(cvq_group < 0)) { |
152128d6 | 532 | error_report_err(err); |
c1a10086 EP |
533 | return cvq_group; |
534 | } | |
c1a10086 EP |
535 | |
536 | r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); | |
537 | if (unlikely(r < 0)) { | |
538 | return r; | |
539 | } | |
540 | ||
c1a10086 EP |
541 | v->shadow_vqs_enabled = true; |
542 | s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; | |
543 | ||
544 | out: | |
7a7f87e9 EP |
545 | if (!s->vhost_vdpa.shadow_vqs_enabled) { |
546 | return 0; | |
2df4dd31 EP |
547 | } |
548 | ||
00ef422e EP |
549 | if (s0->vhost_vdpa.iova_tree) { |
550 | /* | |
551 | * SVQ is already configured for all virtqueues. Reuse IOVA tree for | |
552 | * simplicity, whether CVQ shares ASID with guest or not, because: | |
553 | * - Memory listener need access to guest's memory addresses allocated | |
554 | * in the IOVA tree. | |
555 | * - There should be plenty of IOVA address space for both ASID not to | |
556 | * worry about collisions between them. Guest's translations are | |
557 | * still validated with virtio virtqueue_pop so there is no risk for | |
558 | * the guest to access memory that it shouldn't. | |
559 | * | |
560 | * To allocate a iova tree per ASID is doable but it complicates the | |
561 | * code and it is not worth it for the moment. | |
562 | */ | |
563 | v->iova_tree = s0->vhost_vdpa.iova_tree; | |
564 | } else { | |
565 | v->iova_tree = vhost_iova_tree_new(v->iova_range.first, | |
566 | v->iova_range.last); | |
567 | } | |
568 | ||
7a7f87e9 EP |
569 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, |
570 | vhost_vdpa_net_cvq_cmd_page_len(), false); | |
571 | if (unlikely(r < 0)) { | |
572 | return r; | |
573 | } | |
574 | ||
17fb889f | 575 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, |
7a7f87e9 EP |
576 | vhost_vdpa_net_cvq_cmd_page_len(), true); |
577 | if (unlikely(r < 0)) { | |
2df4dd31 | 578 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); |
2df4dd31 EP |
579 | } |
580 | ||
7a7f87e9 EP |
581 | return r; |
582 | } | |
583 | ||
584 | static void vhost_vdpa_net_cvq_stop(NetClientState *nc) | |
585 | { | |
586 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
587 | ||
588 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
589 | ||
590 | if (s->vhost_vdpa.shadow_vqs_enabled) { | |
591 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); | |
17fb889f | 592 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); |
7a7f87e9 | 593 | } |
00ef422e EP |
594 | |
595 | vhost_vdpa_net_client_stop(nc); | |
2df4dd31 EP |
596 | } |
597 | ||
be4278b6 EP |
598 | static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, |
599 | size_t in_len) | |
600 | { | |
601 | /* Buffers for the device */ | |
602 | const struct iovec out = { | |
603 | .iov_base = s->cvq_cmd_out_buffer, | |
604 | .iov_len = out_len, | |
605 | }; | |
606 | const struct iovec in = { | |
17fb889f | 607 | .iov_base = s->status, |
be4278b6 EP |
608 | .iov_len = sizeof(virtio_net_ctrl_ack), |
609 | }; | |
610 | VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); | |
611 | int r; | |
612 | ||
613 | r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); | |
614 | if (unlikely(r != 0)) { | |
615 | if (unlikely(r == -ENOSPC)) { | |
616 | qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", | |
617 | __func__); | |
618 | } | |
619 | return r; | |
620 | } | |
621 | ||
622 | /* | |
623 | * We can poll here since we've had BQL from the time we sent the | |
624 | * descriptor. Also, we need to take the answer before SVQ pulls by itself, | |
625 | * when BQL is released | |
626 | */ | |
627 | return vhost_svq_poll(svq); | |
628 | } | |
629 | ||
f73c0c43 | 630 | static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, |
2848c6aa HJ |
631 | uint8_t cmd, const struct iovec *data_sg, |
632 | size_t data_num) | |
f73c0c43 EP |
633 | { |
634 | const struct virtio_net_ctrl_hdr ctrl = { | |
635 | .class = class, | |
636 | .cmd = cmd, | |
637 | }; | |
2848c6aa | 638 | size_t data_size = iov_size(data_sg, data_num); |
f73c0c43 EP |
639 | |
640 | assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); | |
641 | ||
2848c6aa | 642 | /* pack the CVQ command header */ |
f73c0c43 | 643 | memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); |
f73c0c43 | 644 | |
2848c6aa HJ |
645 | /* pack the CVQ command command-specific-data */ |
646 | iov_to_buf(data_sg, data_num, 0, | |
647 | s->cvq_cmd_out_buffer + sizeof(ctrl), data_size); | |
648 | ||
649 | return vhost_vdpa_net_cvq_add(s, data_size + sizeof(ctrl), | |
f73c0c43 EP |
650 | sizeof(virtio_net_ctrl_ack)); |
651 | } | |
652 | ||
653 | static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) | |
654 | { | |
02d3bf09 | 655 | if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_MAC_ADDR)) { |
2848c6aa HJ |
656 | const struct iovec data = { |
657 | .iov_base = (void *)n->mac, | |
658 | .iov_len = sizeof(n->mac), | |
659 | }; | |
f73c0c43 EP |
660 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, |
661 | VIRTIO_NET_CTRL_MAC_ADDR_SET, | |
2848c6aa | 662 | &data, 1); |
f73c0c43 EP |
663 | if (unlikely(dev_written < 0)) { |
664 | return dev_written; | |
665 | } | |
b479bc3c HJ |
666 | if (*s->status != VIRTIO_NET_OK) { |
667 | return -EIO; | |
668 | } | |
f73c0c43 EP |
669 | } |
670 | ||
0ddcecb8 HJ |
671 | /* |
672 | * According to VirtIO standard, "The device MUST have an | |
673 | * empty MAC filtering table on reset.". | |
674 | * | |
675 | * Therefore, there is no need to send this CVQ command if the | |
676 | * driver also sets an empty MAC filter table, which aligns with | |
677 | * the device's defaults. | |
678 | * | |
679 | * Note that the device's defaults can mismatch the driver's | |
680 | * configuration only at live migration. | |
681 | */ | |
682 | if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX) || | |
683 | n->mac_table.in_use == 0) { | |
684 | return 0; | |
685 | } | |
686 | ||
687 | uint32_t uni_entries = n->mac_table.first_multi, | |
688 | uni_macs_size = uni_entries * ETH_ALEN, | |
689 | mul_entries = n->mac_table.in_use - uni_entries, | |
690 | mul_macs_size = mul_entries * ETH_ALEN; | |
691 | struct virtio_net_ctrl_mac uni = { | |
692 | .entries = cpu_to_le32(uni_entries), | |
693 | }; | |
694 | struct virtio_net_ctrl_mac mul = { | |
695 | .entries = cpu_to_le32(mul_entries), | |
696 | }; | |
697 | const struct iovec data[] = { | |
698 | { | |
699 | .iov_base = &uni, | |
700 | .iov_len = sizeof(uni), | |
701 | }, { | |
702 | .iov_base = n->mac_table.macs, | |
703 | .iov_len = uni_macs_size, | |
704 | }, { | |
705 | .iov_base = &mul, | |
706 | .iov_len = sizeof(mul), | |
707 | }, { | |
708 | .iov_base = &n->mac_table.macs[uni_macs_size], | |
709 | .iov_len = mul_macs_size, | |
710 | }, | |
711 | }; | |
712 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, | |
713 | VIRTIO_NET_CTRL_MAC, | |
714 | VIRTIO_NET_CTRL_MAC_TABLE_SET, | |
715 | data, ARRAY_SIZE(data)); | |
716 | if (unlikely(dev_written < 0)) { | |
717 | return dev_written; | |
718 | } | |
719 | if (*s->status != VIRTIO_NET_OK) { | |
720 | return -EIO; | |
721 | } | |
722 | ||
f73c0c43 EP |
723 | return 0; |
724 | } | |
725 | ||
f64c7cda EP |
726 | static int vhost_vdpa_net_load_mq(VhostVDPAState *s, |
727 | const VirtIONet *n) | |
728 | { | |
729 | struct virtio_net_ctrl_mq mq; | |
f64c7cda EP |
730 | ssize_t dev_written; |
731 | ||
02d3bf09 | 732 | if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_MQ)) { |
f64c7cda EP |
733 | return 0; |
734 | } | |
735 | ||
736 | mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); | |
2848c6aa HJ |
737 | const struct iovec data = { |
738 | .iov_base = &mq, | |
739 | .iov_len = sizeof(mq), | |
740 | }; | |
f64c7cda | 741 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, |
2848c6aa HJ |
742 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, |
743 | &data, 1); | |
f64c7cda EP |
744 | if (unlikely(dev_written < 0)) { |
745 | return dev_written; | |
746 | } | |
f45fd95e HJ |
747 | if (*s->status != VIRTIO_NET_OK) { |
748 | return -EIO; | |
749 | } | |
f64c7cda | 750 | |
f45fd95e | 751 | return 0; |
f64c7cda EP |
752 | } |
753 | ||
0b58d368 HJ |
754 | static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, |
755 | const VirtIONet *n) | |
756 | { | |
757 | uint64_t offloads; | |
758 | ssize_t dev_written; | |
759 | ||
760 | if (!virtio_vdev_has_feature(&n->parent_obj, | |
761 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { | |
762 | return 0; | |
763 | } | |
764 | ||
765 | if (n->curr_guest_offloads == virtio_net_supported_guest_offloads(n)) { | |
766 | /* | |
767 | * According to VirtIO standard, "Upon feature negotiation | |
768 | * corresponding offload gets enabled to preserve | |
769 | * backward compatibility.". | |
770 | * | |
771 | * Therefore, there is no need to send this CVQ command if the | |
772 | * driver also enables all supported offloads, which aligns with | |
773 | * the device's defaults. | |
774 | * | |
775 | * Note that the device's defaults can mismatch the driver's | |
776 | * configuration only at live migration. | |
777 | */ | |
778 | return 0; | |
779 | } | |
780 | ||
781 | offloads = cpu_to_le64(n->curr_guest_offloads); | |
2848c6aa HJ |
782 | const struct iovec data = { |
783 | .iov_base = &offloads, | |
784 | .iov_len = sizeof(offloads), | |
785 | }; | |
0b58d368 HJ |
786 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS, |
787 | VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, | |
2848c6aa | 788 | &data, 1); |
0b58d368 HJ |
789 | if (unlikely(dev_written < 0)) { |
790 | return dev_written; | |
791 | } | |
6f348071 HJ |
792 | if (*s->status != VIRTIO_NET_OK) { |
793 | return -EIO; | |
794 | } | |
0b58d368 | 795 | |
6f348071 | 796 | return 0; |
0b58d368 HJ |
797 | } |
798 | ||
b12f907e HJ |
799 | static int vhost_vdpa_net_load_rx_mode(VhostVDPAState *s, |
800 | uint8_t cmd, | |
801 | uint8_t on) | |
802 | { | |
803 | const struct iovec data = { | |
804 | .iov_base = &on, | |
805 | .iov_len = sizeof(on), | |
806 | }; | |
807 | return vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_RX, | |
808 | cmd, &data, 1); | |
809 | } | |
810 | ||
811 | static int vhost_vdpa_net_load_rx(VhostVDPAState *s, | |
812 | const VirtIONet *n) | |
813 | { | |
814 | ssize_t dev_written; | |
815 | ||
816 | if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX)) { | |
817 | return 0; | |
818 | } | |
819 | ||
820 | /* | |
821 | * According to virtio_net_reset(), device turns promiscuous mode | |
822 | * on by default. | |
823 | * | |
0a19d879 | 824 | * Additionally, according to VirtIO standard, "Since there are |
b12f907e HJ |
825 | * no guarantees, it can use a hash filter or silently switch to |
826 | * allmulti or promiscuous mode if it is given too many addresses.". | |
827 | * QEMU marks `n->mac_table.uni_overflow` if guest sets too many | |
828 | * non-multicast MAC addresses, indicating that promiscuous mode | |
829 | * should be enabled. | |
830 | * | |
831 | * Therefore, QEMU should only send this CVQ command if the | |
832 | * `n->mac_table.uni_overflow` is not marked and `n->promisc` is off, | |
833 | * which sets promiscuous mode on, different from the device's defaults. | |
834 | * | |
835 | * Note that the device's defaults can mismatch the driver's | |
836 | * configuration only at live migration. | |
837 | */ | |
838 | if (!n->mac_table.uni_overflow && !n->promisc) { | |
839 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
840 | VIRTIO_NET_CTRL_RX_PROMISC, 0); | |
841 | if (unlikely(dev_written < 0)) { | |
842 | return dev_written; | |
843 | } | |
844 | if (*s->status != VIRTIO_NET_OK) { | |
845 | return -EIO; | |
846 | } | |
847 | } | |
848 | ||
849 | /* | |
850 | * According to virtio_net_reset(), device turns all-multicast mode | |
851 | * off by default. | |
852 | * | |
853 | * According to VirtIO standard, "Since there are no guarantees, | |
854 | * it can use a hash filter or silently switch to allmulti or | |
855 | * promiscuous mode if it is given too many addresses.". QEMU marks | |
856 | * `n->mac_table.multi_overflow` if guest sets too many | |
857 | * non-multicast MAC addresses. | |
858 | * | |
859 | * Therefore, QEMU should only send this CVQ command if the | |
860 | * `n->mac_table.multi_overflow` is marked or `n->allmulti` is on, | |
861 | * which sets all-multicast mode on, different from the device's defaults. | |
862 | * | |
863 | * Note that the device's defaults can mismatch the driver's | |
864 | * configuration only at live migration. | |
865 | */ | |
866 | if (n->mac_table.multi_overflow || n->allmulti) { | |
867 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
868 | VIRTIO_NET_CTRL_RX_ALLMULTI, 1); | |
869 | if (unlikely(dev_written < 0)) { | |
870 | return dev_written; | |
871 | } | |
872 | if (*s->status != VIRTIO_NET_OK) { | |
873 | return -EIO; | |
874 | } | |
875 | } | |
876 | ||
4fd180c7 HJ |
877 | if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX_EXTRA)) { |
878 | return 0; | |
879 | } | |
880 | ||
881 | /* | |
882 | * According to virtio_net_reset(), device turns all-unicast mode | |
883 | * off by default. | |
884 | * | |
885 | * Therefore, QEMU should only send this CVQ command if the driver | |
886 | * sets all-unicast mode on, different from the device's defaults. | |
887 | * | |
888 | * Note that the device's defaults can mismatch the driver's | |
889 | * configuration only at live migration. | |
890 | */ | |
891 | if (n->alluni) { | |
892 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
893 | VIRTIO_NET_CTRL_RX_ALLUNI, 1); | |
894 | if (dev_written < 0) { | |
895 | return dev_written; | |
896 | } | |
897 | if (*s->status != VIRTIO_NET_OK) { | |
898 | return -EIO; | |
899 | } | |
900 | } | |
901 | ||
902 | /* | |
903 | * According to virtio_net_reset(), device turns non-multicast mode | |
904 | * off by default. | |
905 | * | |
906 | * Therefore, QEMU should only send this CVQ command if the driver | |
907 | * sets non-multicast mode on, different from the device's defaults. | |
908 | * | |
909 | * Note that the device's defaults can mismatch the driver's | |
910 | * configuration only at live migration. | |
911 | */ | |
912 | if (n->nomulti) { | |
913 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
914 | VIRTIO_NET_CTRL_RX_NOMULTI, 1); | |
915 | if (dev_written < 0) { | |
916 | return dev_written; | |
917 | } | |
918 | if (*s->status != VIRTIO_NET_OK) { | |
919 | return -EIO; | |
920 | } | |
921 | } | |
922 | ||
923 | /* | |
924 | * According to virtio_net_reset(), device turns non-unicast mode | |
925 | * off by default. | |
926 | * | |
927 | * Therefore, QEMU should only send this CVQ command if the driver | |
928 | * sets non-unicast mode on, different from the device's defaults. | |
929 | * | |
930 | * Note that the device's defaults can mismatch the driver's | |
931 | * configuration only at live migration. | |
932 | */ | |
933 | if (n->nouni) { | |
934 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
935 | VIRTIO_NET_CTRL_RX_NOUNI, 1); | |
936 | if (dev_written < 0) { | |
937 | return dev_written; | |
938 | } | |
939 | if (*s->status != VIRTIO_NET_OK) { | |
940 | return -EIO; | |
941 | } | |
942 | } | |
943 | ||
944 | /* | |
945 | * According to virtio_net_reset(), device turns non-broadcast mode | |
946 | * off by default. | |
947 | * | |
948 | * Therefore, QEMU should only send this CVQ command if the driver | |
949 | * sets non-broadcast mode on, different from the device's defaults. | |
950 | * | |
951 | * Note that the device's defaults can mismatch the driver's | |
952 | * configuration only at live migration. | |
953 | */ | |
954 | if (n->nobcast) { | |
955 | dev_written = vhost_vdpa_net_load_rx_mode(s, | |
956 | VIRTIO_NET_CTRL_RX_NOBCAST, 1); | |
957 | if (dev_written < 0) { | |
958 | return dev_written; | |
959 | } | |
960 | if (*s->status != VIRTIO_NET_OK) { | |
961 | return -EIO; | |
962 | } | |
963 | } | |
964 | ||
b12f907e HJ |
965 | return 0; |
966 | } | |
967 | ||
dd036d8d EP |
968 | static int vhost_vdpa_net_load(NetClientState *nc) |
969 | { | |
970 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
f73c0c43 | 971 | struct vhost_vdpa *v = &s->vhost_vdpa; |
dd036d8d | 972 | const VirtIONet *n; |
f73c0c43 | 973 | int r; |
dd036d8d EP |
974 | |
975 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
976 | ||
977 | if (!v->shadow_vqs_enabled) { | |
978 | return 0; | |
979 | } | |
980 | ||
981 | n = VIRTIO_NET(v->dev->vdev); | |
f73c0c43 EP |
982 | r = vhost_vdpa_net_load_mac(s, n); |
983 | if (unlikely(r < 0)) { | |
984 | return r; | |
dd036d8d | 985 | } |
f64c7cda EP |
986 | r = vhost_vdpa_net_load_mq(s, n); |
987 | if (unlikely(r)) { | |
988 | return r; | |
989 | } | |
0b58d368 HJ |
990 | r = vhost_vdpa_net_load_offloads(s, n); |
991 | if (unlikely(r)) { | |
992 | return r; | |
993 | } | |
b12f907e HJ |
994 | r = vhost_vdpa_net_load_rx(s, n); |
995 | if (unlikely(r)) { | |
996 | return r; | |
997 | } | |
dd036d8d EP |
998 | |
999 | return 0; | |
1000 | } | |
1001 | ||
f8972b56 EP |
1002 | static NetClientInfo net_vhost_vdpa_cvq_info = { |
1003 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
1004 | .size = sizeof(VhostVDPAState), | |
1005 | .receive = vhost_vdpa_receive, | |
7a7f87e9 | 1006 | .start = vhost_vdpa_net_cvq_start, |
dd036d8d | 1007 | .load = vhost_vdpa_net_load, |
7a7f87e9 | 1008 | .stop = vhost_vdpa_net_cvq_stop, |
f8972b56 EP |
1009 | .cleanup = vhost_vdpa_cleanup, |
1010 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
1011 | .has_ufo = vhost_vdpa_has_ufo, | |
1012 | .check_peer_type = vhost_vdpa_check_peer_type, | |
1013 | }; | |
1014 | ||
fee364e4 HJ |
1015 | /* |
1016 | * Forward the excessive VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command to | |
1017 | * vdpa device. | |
1018 | * | |
1019 | * Considering that QEMU cannot send the entire filter table to the | |
1020 | * vdpa device, it should send the VIRTIO_NET_CTRL_RX_PROMISC CVQ | |
1021 | * command to enable promiscuous mode to receive all packets, | |
1022 | * according to VirtIO standard, "Since there are no guarantees, | |
1023 | * it can use a hash filter or silently switch to allmulti or | |
1024 | * promiscuous mode if it is given too many addresses.". | |
1025 | * | |
1026 | * Since QEMU ignores MAC addresses beyond `MAC_TABLE_ENTRIES` and | |
1027 | * marks `n->mac_table.x_overflow` accordingly, it should have | |
1028 | * the same effect on the device model to receive | |
1029 | * (`MAC_TABLE_ENTRIES` + 1) or more non-multicast MAC addresses. | |
1030 | * The same applies to multicast MAC addresses. | |
1031 | * | |
1032 | * Therefore, QEMU can provide the device model with a fake | |
1033 | * VIRTIO_NET_CTRL_MAC_TABLE_SET command with (`MAC_TABLE_ENTRIES` + 1) | |
1034 | * non-multicast MAC addresses and (`MAC_TABLE_ENTRIES` + 1) multicast | |
1035 | * MAC addresses. This ensures that the device model marks | |
1036 | * `n->mac_table.uni_overflow` and `n->mac_table.multi_overflow`, | |
1037 | * allowing all packets to be received, which aligns with the | |
1038 | * state of the vdpa device. | |
1039 | */ | |
1040 | static int vhost_vdpa_net_excessive_mac_filter_cvq_add(VhostVDPAState *s, | |
1041 | VirtQueueElement *elem, | |
1042 | struct iovec *out) | |
1043 | { | |
1044 | struct virtio_net_ctrl_mac mac_data, *mac_ptr; | |
1045 | struct virtio_net_ctrl_hdr *hdr_ptr; | |
1046 | uint32_t cursor; | |
1047 | ssize_t r; | |
1048 | ||
1049 | /* parse the non-multicast MAC address entries from CVQ command */ | |
1050 | cursor = sizeof(*hdr_ptr); | |
1051 | r = iov_to_buf(elem->out_sg, elem->out_num, cursor, | |
1052 | &mac_data, sizeof(mac_data)); | |
1053 | if (unlikely(r != sizeof(mac_data))) { | |
1054 | /* | |
1055 | * If the CVQ command is invalid, we should simulate the vdpa device | |
1056 | * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command | |
1057 | */ | |
1058 | *s->status = VIRTIO_NET_ERR; | |
1059 | return sizeof(*s->status); | |
1060 | } | |
1061 | cursor += sizeof(mac_data) + le32_to_cpu(mac_data.entries) * ETH_ALEN; | |
1062 | ||
1063 | /* parse the multicast MAC address entries from CVQ command */ | |
1064 | r = iov_to_buf(elem->out_sg, elem->out_num, cursor, | |
1065 | &mac_data, sizeof(mac_data)); | |
1066 | if (r != sizeof(mac_data)) { | |
1067 | /* | |
1068 | * If the CVQ command is invalid, we should simulate the vdpa device | |
1069 | * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command | |
1070 | */ | |
1071 | *s->status = VIRTIO_NET_ERR; | |
1072 | return sizeof(*s->status); | |
1073 | } | |
1074 | cursor += sizeof(mac_data) + le32_to_cpu(mac_data.entries) * ETH_ALEN; | |
1075 | ||
1076 | /* validate the CVQ command */ | |
1077 | if (iov_size(elem->out_sg, elem->out_num) != cursor) { | |
1078 | /* | |
1079 | * If the CVQ command is invalid, we should simulate the vdpa device | |
1080 | * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command | |
1081 | */ | |
1082 | *s->status = VIRTIO_NET_ERR; | |
1083 | return sizeof(*s->status); | |
1084 | } | |
1085 | ||
1086 | /* | |
1087 | * According to VirtIO standard, "Since there are no guarantees, | |
1088 | * it can use a hash filter or silently switch to allmulti or | |
1089 | * promiscuous mode if it is given too many addresses.". | |
1090 | * | |
1091 | * Therefore, considering that QEMU is unable to send the entire | |
1092 | * filter table to the vdpa device, it should send the | |
1093 | * VIRTIO_NET_CTRL_RX_PROMISC CVQ command to enable promiscuous mode | |
1094 | */ | |
1095 | r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_PROMISC, 1); | |
1096 | if (unlikely(r < 0)) { | |
1097 | return r; | |
1098 | } | |
1099 | if (*s->status != VIRTIO_NET_OK) { | |
1100 | return sizeof(*s->status); | |
1101 | } | |
1102 | ||
1103 | /* | |
1104 | * QEMU should also send a fake VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ | |
1105 | * command to the device model, including (`MAC_TABLE_ENTRIES` + 1) | |
1106 | * non-multicast MAC addresses and (`MAC_TABLE_ENTRIES` + 1) | |
1107 | * multicast MAC addresses. | |
1108 | * | |
1109 | * By doing so, the device model can mark `n->mac_table.uni_overflow` | |
1110 | * and `n->mac_table.multi_overflow`, enabling all packets to be | |
1111 | * received, which aligns with the state of the vdpa device. | |
1112 | */ | |
1113 | cursor = 0; | |
1114 | uint32_t fake_uni_entries = MAC_TABLE_ENTRIES + 1, | |
1115 | fake_mul_entries = MAC_TABLE_ENTRIES + 1, | |
1116 | fake_cvq_size = sizeof(struct virtio_net_ctrl_hdr) + | |
1117 | sizeof(mac_data) + fake_uni_entries * ETH_ALEN + | |
1118 | sizeof(mac_data) + fake_mul_entries * ETH_ALEN; | |
1119 | ||
1120 | assert(fake_cvq_size < vhost_vdpa_net_cvq_cmd_page_len()); | |
1121 | out->iov_len = fake_cvq_size; | |
1122 | ||
1123 | /* pack the header for fake CVQ command */ | |
1124 | hdr_ptr = out->iov_base + cursor; | |
1125 | hdr_ptr->class = VIRTIO_NET_CTRL_MAC; | |
1126 | hdr_ptr->cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; | |
1127 | cursor += sizeof(*hdr_ptr); | |
1128 | ||
1129 | /* | |
1130 | * Pack the non-multicast MAC addresses part for fake CVQ command. | |
1131 | * | |
1132 | * According to virtio_net_handle_mac(), QEMU doesn't verify the MAC | |
0a19d879 | 1133 | * addresses provided in CVQ command. Therefore, only the entries |
fee364e4 HJ |
1134 | * field need to be prepared in the CVQ command. |
1135 | */ | |
1136 | mac_ptr = out->iov_base + cursor; | |
1137 | mac_ptr->entries = cpu_to_le32(fake_uni_entries); | |
1138 | cursor += sizeof(*mac_ptr) + fake_uni_entries * ETH_ALEN; | |
1139 | ||
1140 | /* | |
1141 | * Pack the multicast MAC addresses part for fake CVQ command. | |
1142 | * | |
1143 | * According to virtio_net_handle_mac(), QEMU doesn't verify the MAC | |
0a19d879 | 1144 | * addresses provided in CVQ command. Therefore, only the entries |
fee364e4 HJ |
1145 | * field need to be prepared in the CVQ command. |
1146 | */ | |
1147 | mac_ptr = out->iov_base + cursor; | |
1148 | mac_ptr->entries = cpu_to_le32(fake_mul_entries); | |
1149 | ||
1150 | /* | |
1151 | * Simulating QEMU poll a vdpa device used buffer | |
1152 | * for VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command | |
1153 | */ | |
1154 | return sizeof(*s->status); | |
1155 | } | |
1156 | ||
2df4dd31 EP |
1157 | /** |
1158 | * Validate and copy control virtqueue commands. | |
1159 | * | |
1160 | * Following QEMU guidelines, we offer a copy of the buffers to the device to | |
1161 | * prevent TOCTOU bugs. | |
bd907ae4 EP |
1162 | */ |
1163 | static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, | |
1164 | VirtQueueElement *elem, | |
1165 | void *opaque) | |
1166 | { | |
2df4dd31 | 1167 | VhostVDPAState *s = opaque; |
be4278b6 | 1168 | size_t in_len; |
45c41018 | 1169 | const struct virtio_net_ctrl_hdr *ctrl; |
bd907ae4 | 1170 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
7a7f87e9 EP |
1171 | /* Out buffer sent to both the vdpa device and the device model */ |
1172 | struct iovec out = { | |
1173 | .iov_base = s->cvq_cmd_out_buffer, | |
1174 | }; | |
2df4dd31 EP |
1175 | /* in buffer used for device model */ |
1176 | const struct iovec in = { | |
1177 | .iov_base = &status, | |
1178 | .iov_len = sizeof(status), | |
1179 | }; | |
be4278b6 | 1180 | ssize_t dev_written = -EINVAL; |
2df4dd31 | 1181 | |
7a7f87e9 EP |
1182 | out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, |
1183 | s->cvq_cmd_out_buffer, | |
fee364e4 | 1184 | vhost_vdpa_net_cvq_cmd_page_len()); |
45c41018 HJ |
1185 | |
1186 | ctrl = s->cvq_cmd_out_buffer; | |
1187 | if (ctrl->class == VIRTIO_NET_CTRL_ANNOUNCE) { | |
3f9a3eeb EP |
1188 | /* |
1189 | * Guest announce capability is emulated by qemu, so don't forward to | |
1190 | * the device. | |
1191 | */ | |
1192 | dev_written = sizeof(status); | |
1193 | *s->status = VIRTIO_NET_OK; | |
fee364e4 HJ |
1194 | } else if (unlikely(ctrl->class == VIRTIO_NET_CTRL_MAC && |
1195 | ctrl->cmd == VIRTIO_NET_CTRL_MAC_TABLE_SET && | |
1196 | iov_size(elem->out_sg, elem->out_num) > out.iov_len)) { | |
1197 | /* | |
1198 | * Due to the size limitation of the out buffer sent to the vdpa device, | |
1199 | * which is determined by vhost_vdpa_net_cvq_cmd_page_len(), excessive | |
1200 | * MAC addresses set by the driver for the filter table can cause | |
1201 | * truncation of the CVQ command in QEMU. As a result, the vdpa device | |
1202 | * rejects the flawed CVQ command. | |
1203 | * | |
1204 | * Therefore, QEMU must handle this situation instead of sending | |
0a19d879 | 1205 | * the CVQ command directly. |
fee364e4 HJ |
1206 | */ |
1207 | dev_written = vhost_vdpa_net_excessive_mac_filter_cvq_add(s, elem, | |
1208 | &out); | |
1209 | if (unlikely(dev_written < 0)) { | |
1210 | goto out; | |
1211 | } | |
3f9a3eeb EP |
1212 | } else { |
1213 | dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); | |
1214 | if (unlikely(dev_written < 0)) { | |
1215 | goto out; | |
1216 | } | |
bd907ae4 EP |
1217 | } |
1218 | ||
bd907ae4 EP |
1219 | if (unlikely(dev_written < sizeof(status))) { |
1220 | error_report("Insufficient written data (%zu)", dev_written); | |
2df4dd31 EP |
1221 | goto out; |
1222 | } | |
1223 | ||
17fb889f | 1224 | if (*s->status != VIRTIO_NET_OK) { |
d45243bc | 1225 | goto out; |
2df4dd31 EP |
1226 | } |
1227 | ||
1228 | status = VIRTIO_NET_ERR; | |
7a7f87e9 | 1229 | virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); |
2df4dd31 EP |
1230 | if (status != VIRTIO_NET_OK) { |
1231 | error_report("Bad CVQ processing in model"); | |
bd907ae4 EP |
1232 | } |
1233 | ||
1234 | out: | |
1235 | in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, | |
1236 | sizeof(status)); | |
1237 | if (unlikely(in_len < sizeof(status))) { | |
1238 | error_report("Bad device CVQ written length"); | |
1239 | } | |
1240 | vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); | |
031b1aba HJ |
1241 | /* |
1242 | * `elem` belongs to vhost_vdpa_net_handle_ctrl_avail() only when | |
1243 | * the function successfully forwards the CVQ command, indicated | |
1244 | * by a non-negative value of `dev_written`. Otherwise, it still | |
1245 | * belongs to SVQ. | |
1246 | * This function should only free the `elem` when it owns. | |
1247 | */ | |
1248 | if (dev_written >= 0) { | |
1249 | g_free(elem); | |
1250 | } | |
be4278b6 | 1251 | return dev_written < 0 ? dev_written : 0; |
bd907ae4 EP |
1252 | } |
1253 | ||
1254 | static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { | |
1255 | .avail_handler = vhost_vdpa_net_handle_ctrl_avail, | |
1256 | }; | |
1257 | ||
152128d6 EP |
1258 | /** |
1259 | * Probe if CVQ is isolated | |
1260 | * | |
1261 | * @device_fd The vdpa device fd | |
1262 | * @features Features offered by the device. | |
1263 | * @cvq_index The control vq pair index | |
1264 | * | |
1265 | * Returns <0 in case of failure, 0 if false and 1 if true. | |
1266 | */ | |
1267 | static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features, | |
1268 | int cvq_index, Error **errp) | |
1269 | { | |
1270 | uint64_t backend_features; | |
1271 | int64_t cvq_group; | |
1272 | uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE | | |
1273 | VIRTIO_CONFIG_S_DRIVER | | |
1274 | VIRTIO_CONFIG_S_FEATURES_OK; | |
1275 | int r; | |
1276 | ||
1277 | ERRP_GUARD(); | |
1278 | ||
1279 | r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); | |
1280 | if (unlikely(r < 0)) { | |
1281 | error_setg_errno(errp, errno, "Cannot get vdpa backend_features"); | |
1282 | return r; | |
1283 | } | |
1284 | ||
1285 | if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID))) { | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | r = ioctl(device_fd, VHOST_SET_FEATURES, &features); | |
1290 | if (unlikely(r)) { | |
1291 | error_setg_errno(errp, errno, "Cannot set features"); | |
1292 | } | |
1293 | ||
1294 | r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); | |
1295 | if (unlikely(r)) { | |
1296 | error_setg_errno(errp, -r, "Cannot set device features"); | |
1297 | goto out; | |
1298 | } | |
1299 | ||
1300 | cvq_group = vhost_vdpa_get_vring_group(device_fd, cvq_index, errp); | |
1301 | if (unlikely(cvq_group < 0)) { | |
1302 | if (cvq_group != -ENOTSUP) { | |
1303 | r = cvq_group; | |
1304 | goto out; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * The kernel report VHOST_BACKEND_F_IOTLB_ASID if the vdpa frontend | |
1309 | * support ASID even if the parent driver does not. The CVQ cannot be | |
1310 | * isolated in this case. | |
1311 | */ | |
1312 | error_free(*errp); | |
1313 | *errp = NULL; | |
1314 | r = 0; | |
1315 | goto out; | |
1316 | } | |
1317 | ||
1318 | for (int i = 0; i < cvq_index; ++i) { | |
1319 | int64_t group = vhost_vdpa_get_vring_group(device_fd, i, errp); | |
1320 | if (unlikely(group < 0)) { | |
1321 | r = group; | |
1322 | goto out; | |
1323 | } | |
1324 | ||
1325 | if (group == (int64_t)cvq_group) { | |
1326 | r = 0; | |
1327 | goto out; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | r = 1; | |
1332 | ||
1333 | out: | |
1334 | status = 0; | |
1335 | ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); | |
1336 | return r; | |
1337 | } | |
1338 | ||
654790b6 | 1339 | static NetClientState *net_vhost_vdpa_init(NetClientState *peer, |
a585fad2 EP |
1340 | const char *device, |
1341 | const char *name, | |
1342 | int vdpa_device_fd, | |
1343 | int queue_pair_index, | |
1344 | int nvqs, | |
1345 | bool is_datapath, | |
1346 | bool svq, | |
5c1ebd4c | 1347 | struct vhost_vdpa_iova_range iova_range, |
152128d6 EP |
1348 | uint64_t features, |
1349 | Error **errp) | |
1e0a84ea CL |
1350 | { |
1351 | NetClientState *nc = NULL; | |
1352 | VhostVDPAState *s; | |
1e0a84ea CL |
1353 | int ret = 0; |
1354 | assert(name); | |
152128d6 EP |
1355 | int cvq_isolated; |
1356 | ||
40237840 JW |
1357 | if (is_datapath) { |
1358 | nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, | |
1359 | name); | |
1360 | } else { | |
152128d6 EP |
1361 | cvq_isolated = vhost_vdpa_probe_cvq_isolation(vdpa_device_fd, features, |
1362 | queue_pair_index * 2, | |
1363 | errp); | |
1364 | if (unlikely(cvq_isolated < 0)) { | |
1365 | return NULL; | |
1366 | } | |
1367 | ||
f8972b56 | 1368 | nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, |
40237840 JW |
1369 | device, name); |
1370 | } | |
53b85d95 | 1371 | qemu_set_info_str(nc, TYPE_VHOST_VDPA); |
1e0a84ea | 1372 | s = DO_UPCAST(VhostVDPAState, nc, nc); |
7327813d | 1373 | |
1e0a84ea | 1374 | s->vhost_vdpa.device_fd = vdpa_device_fd; |
40237840 | 1375 | s->vhost_vdpa.index = queue_pair_index; |
7f211a28 | 1376 | s->always_svq = svq; |
69498430 | 1377 | s->migration_state.notify = vdpa_net_migration_state_notifier; |
1576dbb5 | 1378 | s->vhost_vdpa.shadow_vqs_enabled = svq; |
a585fad2 | 1379 | s->vhost_vdpa.iova_range = iova_range; |
6188d78a | 1380 | s->vhost_vdpa.shadow_data = svq; |
5c1ebd4c EP |
1381 | if (queue_pair_index == 0) { |
1382 | vhost_vdpa_net_valid_svq_features(features, | |
1383 | &s->vhost_vdpa.migration_blocker); | |
1384 | } else if (!is_datapath) { | |
babf8b87 EP |
1385 | s->cvq_cmd_out_buffer = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), |
1386 | PROT_READ | PROT_WRITE, | |
1387 | MAP_SHARED | MAP_ANONYMOUS, -1, 0); | |
1388 | s->status = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), | |
1389 | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, | |
1390 | -1, 0); | |
2df4dd31 | 1391 | |
bd907ae4 EP |
1392 | s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; |
1393 | s->vhost_vdpa.shadow_vq_ops_opaque = s; | |
152128d6 | 1394 | s->cvq_isolated = cvq_isolated; |
9c363cf6 EP |
1395 | |
1396 | /* | |
8bc0049e EP |
1397 | * TODO: We cannot migrate devices with CVQ and no x-svq enabled as |
1398 | * there is no way to set the device state (MAC, MQ, etc) before | |
1399 | * starting the datapath. | |
9c363cf6 EP |
1400 | * |
1401 | * Migration blocker ownership now belongs to s->vhost_vdpa. | |
1402 | */ | |
8bc0049e EP |
1403 | if (!svq) { |
1404 | error_setg(&s->vhost_vdpa.migration_blocker, | |
1405 | "net vdpa cannot migrate with CVQ feature"); | |
1406 | } | |
bd907ae4 | 1407 | } |
40237840 | 1408 | ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); |
74af5eec | 1409 | if (ret) { |
74af5eec | 1410 | qemu_del_net_client(nc); |
654790b6 | 1411 | return NULL; |
74af5eec | 1412 | } |
654790b6 | 1413 | return nc; |
1e0a84ea CL |
1414 | } |
1415 | ||
8170ab3f EP |
1416 | static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) |
1417 | { | |
1418 | int ret = ioctl(fd, VHOST_GET_FEATURES, features); | |
1419 | if (unlikely(ret < 0)) { | |
1420 | error_setg_errno(errp, errno, | |
1421 | "Fail to query features from vhost-vDPA device"); | |
1422 | } | |
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, | |
1427 | int *has_cvq, Error **errp) | |
40237840 JW |
1428 | { |
1429 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); | |
cd523a41 | 1430 | g_autofree struct vhost_vdpa_config *config = NULL; |
40237840 | 1431 | __virtio16 *max_queue_pairs; |
40237840 JW |
1432 | int ret; |
1433 | ||
40237840 JW |
1434 | if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { |
1435 | *has_cvq = 1; | |
1436 | } else { | |
1437 | *has_cvq = 0; | |
1438 | } | |
1439 | ||
1440 | if (features & (1 << VIRTIO_NET_F_MQ)) { | |
1441 | config = g_malloc0(config_size + sizeof(*max_queue_pairs)); | |
1442 | config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); | |
1443 | config->len = sizeof(*max_queue_pairs); | |
1444 | ||
1445 | ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); | |
1446 | if (ret) { | |
1447 | error_setg(errp, "Fail to get config from vhost-vDPA device"); | |
1448 | return -ret; | |
1449 | } | |
1450 | ||
1451 | max_queue_pairs = (__virtio16 *)&config->buf; | |
1452 | ||
1453 | return lduw_le_p(max_queue_pairs); | |
1454 | } | |
1455 | ||
1456 | return 1; | |
1457 | } | |
1458 | ||
1e0a84ea CL |
1459 | int net_init_vhost_vdpa(const Netdev *netdev, const char *name, |
1460 | NetClientState *peer, Error **errp) | |
1461 | { | |
1462 | const NetdevVhostVDPAOptions *opts; | |
8170ab3f | 1463 | uint64_t features; |
654790b6 | 1464 | int vdpa_device_fd; |
eb3cb751 | 1465 | g_autofree NetClientState **ncs = NULL; |
a585fad2 | 1466 | struct vhost_vdpa_iova_range iova_range; |
eb3cb751 | 1467 | NetClientState *nc; |
aed5da45 | 1468 | int queue_pairs, r, i = 0, has_cvq = 0; |
1e0a84ea CL |
1469 | |
1470 | assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
1471 | opts = &netdev->u.vhost_vdpa; | |
7480874a | 1472 | if (!opts->vhostdev && !opts->vhostfd) { |
8801ccd0 SWL |
1473 | error_setg(errp, |
1474 | "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); | |
c8295404 EP |
1475 | return -1; |
1476 | } | |
7327813d | 1477 | |
7480874a | 1478 | if (opts->vhostdev && opts->vhostfd) { |
8801ccd0 SWL |
1479 | error_setg(errp, |
1480 | "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); | |
1481 | return -1; | |
1482 | } | |
1483 | ||
7480874a | 1484 | if (opts->vhostdev) { |
8801ccd0 SWL |
1485 | vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); |
1486 | if (vdpa_device_fd == -1) { | |
1487 | return -errno; | |
1488 | } | |
5107fd3e PM |
1489 | } else { |
1490 | /* has_vhostfd */ | |
8801ccd0 SWL |
1491 | vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); |
1492 | if (vdpa_device_fd == -1) { | |
1493 | error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); | |
1494 | return -1; | |
1495 | } | |
7327813d JW |
1496 | } |
1497 | ||
8170ab3f EP |
1498 | r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); |
1499 | if (unlikely(r < 0)) { | |
aed5da45 | 1500 | goto err; |
8170ab3f EP |
1501 | } |
1502 | ||
1503 | queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, | |
40237840 JW |
1504 | &has_cvq, errp); |
1505 | if (queue_pairs < 0) { | |
7327813d | 1506 | qemu_close(vdpa_device_fd); |
40237840 JW |
1507 | return queue_pairs; |
1508 | } | |
1509 | ||
bf7a2ad8 LM |
1510 | r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); |
1511 | if (unlikely(r < 0)) { | |
1512 | error_setg(errp, "vhost-vdpa: get iova range failed: %s", | |
1513 | strerror(-r)); | |
1514 | goto err; | |
1515 | } | |
1516 | ||
00ef422e EP |
1517 | if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { |
1518 | goto err; | |
1576dbb5 EP |
1519 | } |
1520 | ||
40237840 JW |
1521 | ncs = g_malloc0(sizeof(*ncs) * queue_pairs); |
1522 | ||
1523 | for (i = 0; i < queue_pairs; i++) { | |
1524 | ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 1525 | vdpa_device_fd, i, 2, true, opts->x_svq, |
152128d6 | 1526 | iova_range, features, errp); |
40237840 JW |
1527 | if (!ncs[i]) |
1528 | goto err; | |
7327813d JW |
1529 | } |
1530 | ||
40237840 JW |
1531 | if (has_cvq) { |
1532 | nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 1533 | vdpa_device_fd, i, 1, false, |
152128d6 | 1534 | opts->x_svq, iova_range, features, errp); |
40237840 JW |
1535 | if (!nc) |
1536 | goto err; | |
1537 | } | |
1538 | ||
654790b6 | 1539 | return 0; |
40237840 JW |
1540 | |
1541 | err: | |
1542 | if (i) { | |
9bd05507 SWL |
1543 | for (i--; i >= 0; i--) { |
1544 | qemu_del_net_client(ncs[i]); | |
1545 | } | |
40237840 | 1546 | } |
1576dbb5 | 1547 | |
40237840 | 1548 | qemu_close(vdpa_device_fd); |
40237840 JW |
1549 | |
1550 | return -1; | |
1e0a84ea | 1551 | } |