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Commit | Line | Data |
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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" | |
29 | #include "hw/virtio/vhost.h" | |
30 | ||
31 | /* Todo:need to add the multiqueue support here */ | |
32 | typedef struct VhostVDPAState { | |
33 | NetClientState nc; | |
34 | struct vhost_vdpa vhost_vdpa; | |
35 | VHostNetState *vhost_net; | |
2df4dd31 EP |
36 | |
37 | /* Control commands shadow buffers */ | |
17fb889f EP |
38 | void *cvq_cmd_out_buffer; |
39 | virtio_net_ctrl_ack *status; | |
40 | ||
1e0a84ea CL |
41 | bool started; |
42 | } VhostVDPAState; | |
43 | ||
44 | const int vdpa_feature_bits[] = { | |
45 | VIRTIO_F_NOTIFY_ON_EMPTY, | |
46 | VIRTIO_RING_F_INDIRECT_DESC, | |
47 | VIRTIO_RING_F_EVENT_IDX, | |
48 | VIRTIO_F_ANY_LAYOUT, | |
49 | VIRTIO_F_VERSION_1, | |
50 | VIRTIO_NET_F_CSUM, | |
51 | VIRTIO_NET_F_GUEST_CSUM, | |
52 | VIRTIO_NET_F_GSO, | |
53 | VIRTIO_NET_F_GUEST_TSO4, | |
54 | VIRTIO_NET_F_GUEST_TSO6, | |
55 | VIRTIO_NET_F_GUEST_ECN, | |
56 | VIRTIO_NET_F_GUEST_UFO, | |
57 | VIRTIO_NET_F_HOST_TSO4, | |
58 | VIRTIO_NET_F_HOST_TSO6, | |
59 | VIRTIO_NET_F_HOST_ECN, | |
60 | VIRTIO_NET_F_HOST_UFO, | |
61 | VIRTIO_NET_F_MRG_RXBUF, | |
62 | VIRTIO_NET_F_MTU, | |
40237840 JW |
63 | VIRTIO_NET_F_CTRL_RX, |
64 | VIRTIO_NET_F_CTRL_RX_EXTRA, | |
65 | VIRTIO_NET_F_CTRL_VLAN, | |
40237840 JW |
66 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
67 | VIRTIO_NET_F_RSS, | |
68 | VIRTIO_NET_F_MQ, | |
69 | VIRTIO_NET_F_CTRL_VQ, | |
1e0a84ea CL |
70 | VIRTIO_F_IOMMU_PLATFORM, |
71 | VIRTIO_F_RING_PACKED, | |
562a7d23 | 72 | VIRTIO_F_RING_RESET, |
0145c393 AM |
73 | VIRTIO_NET_F_RSS, |
74 | VIRTIO_NET_F_HASH_REPORT, | |
1e0a84ea | 75 | VIRTIO_NET_F_GUEST_ANNOUNCE, |
9aa47edd | 76 | VIRTIO_NET_F_STATUS, |
1e0a84ea CL |
77 | VHOST_INVALID_FEATURE_BIT |
78 | }; | |
79 | ||
1576dbb5 EP |
80 | /** Supported device specific feature bits with SVQ */ |
81 | static const uint64_t vdpa_svq_device_features = | |
82 | BIT_ULL(VIRTIO_NET_F_CSUM) | | |
83 | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | | |
84 | BIT_ULL(VIRTIO_NET_F_MTU) | | |
85 | BIT_ULL(VIRTIO_NET_F_MAC) | | |
86 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | | |
87 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | | |
88 | BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | | |
89 | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | | |
90 | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | | |
91 | BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | | |
92 | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | | |
93 | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | | |
94 | BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | | |
95 | BIT_ULL(VIRTIO_NET_F_STATUS) | | |
96 | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | | |
72b99a87 | 97 | BIT_ULL(VIRTIO_NET_F_MQ) | |
1576dbb5 EP |
98 | BIT_ULL(VIRTIO_F_ANY_LAYOUT) | |
99 | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | | |
100 | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | | |
101 | BIT_ULL(VIRTIO_NET_F_STANDBY); | |
102 | ||
1e0a84ea CL |
103 | VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) |
104 | { | |
105 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
106 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
107 | return s->vhost_net; | |
108 | } | |
109 | ||
36e46472 EP |
110 | static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) |
111 | { | |
112 | uint64_t invalid_dev_features = | |
113 | features & ~vdpa_svq_device_features & | |
114 | /* Transport are all accepted at this point */ | |
115 | ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, | |
116 | VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); | |
117 | ||
118 | if (invalid_dev_features) { | |
119 | error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, | |
120 | invalid_dev_features); | |
121 | } | |
122 | ||
123 | return !invalid_dev_features; | |
124 | } | |
125 | ||
1e0a84ea CL |
126 | static int vhost_vdpa_net_check_device_id(struct vhost_net *net) |
127 | { | |
128 | uint32_t device_id; | |
129 | int ret; | |
130 | struct vhost_dev *hdev; | |
131 | ||
132 | hdev = (struct vhost_dev *)&net->dev; | |
133 | ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); | |
134 | if (device_id != VIRTIO_ID_NET) { | |
135 | return -ENOTSUP; | |
136 | } | |
137 | return ret; | |
138 | } | |
139 | ||
40237840 JW |
140 | static int vhost_vdpa_add(NetClientState *ncs, void *be, |
141 | int queue_pair_index, int nvqs) | |
1e0a84ea CL |
142 | { |
143 | VhostNetOptions options; | |
144 | struct vhost_net *net = NULL; | |
145 | VhostVDPAState *s; | |
146 | int ret; | |
147 | ||
148 | options.backend_type = VHOST_BACKEND_TYPE_VDPA; | |
149 | assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
150 | s = DO_UPCAST(VhostVDPAState, nc, ncs); | |
151 | options.net_backend = ncs; | |
152 | options.opaque = be; | |
153 | options.busyloop_timeout = 0; | |
40237840 | 154 | options.nvqs = nvqs; |
1e0a84ea CL |
155 | |
156 | net = vhost_net_init(&options); | |
157 | if (!net) { | |
158 | error_report("failed to init vhost_net for queue"); | |
a97ef87a | 159 | goto err_init; |
1e0a84ea | 160 | } |
1e0a84ea CL |
161 | s->vhost_net = net; |
162 | ret = vhost_vdpa_net_check_device_id(net); | |
163 | if (ret) { | |
a97ef87a | 164 | goto err_check; |
1e0a84ea CL |
165 | } |
166 | return 0; | |
a97ef87a JW |
167 | err_check: |
168 | vhost_net_cleanup(net); | |
169 | g_free(net); | |
170 | err_init: | |
1e0a84ea CL |
171 | return -1; |
172 | } | |
173 | ||
174 | static void vhost_vdpa_cleanup(NetClientState *nc) | |
175 | { | |
176 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
1576dbb5 | 177 | struct vhost_dev *dev = &s->vhost_net->dev; |
1e0a84ea | 178 | |
2df4dd31 | 179 | qemu_vfree(s->cvq_cmd_out_buffer); |
17fb889f | 180 | qemu_vfree(s->status); |
1576dbb5 EP |
181 | if (dev->vq_index + dev->nvqs == dev->vq_index_end) { |
182 | g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); | |
183 | } | |
1e0a84ea CL |
184 | if (s->vhost_net) { |
185 | vhost_net_cleanup(s->vhost_net); | |
186 | g_free(s->vhost_net); | |
187 | s->vhost_net = NULL; | |
188 | } | |
57b3a7d8 CL |
189 | if (s->vhost_vdpa.device_fd >= 0) { |
190 | qemu_close(s->vhost_vdpa.device_fd); | |
191 | s->vhost_vdpa.device_fd = -1; | |
192 | } | |
1e0a84ea CL |
193 | } |
194 | ||
195 | static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) | |
196 | { | |
197 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
198 | ||
199 | return true; | |
200 | } | |
201 | ||
202 | static bool vhost_vdpa_has_ufo(NetClientState *nc) | |
203 | { | |
204 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
205 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
206 | uint64_t features = 0; | |
207 | features |= (1ULL << VIRTIO_NET_F_HOST_UFO); | |
208 | features = vhost_net_get_features(s->vhost_net, features); | |
209 | return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); | |
210 | ||
211 | } | |
212 | ||
ee8a1c63 KW |
213 | static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, |
214 | Error **errp) | |
215 | { | |
216 | const char *driver = object_class_get_name(oc); | |
217 | ||
218 | if (!g_str_has_prefix(driver, "virtio-net-")) { | |
219 | error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); | |
220 | return false; | |
221 | } | |
222 | ||
223 | return true; | |
224 | } | |
225 | ||
846a1e85 EP |
226 | /** Dummy receive in case qemu falls back to userland tap networking */ |
227 | static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, | |
228 | size_t size) | |
229 | { | |
bc5add1d | 230 | return size; |
846a1e85 EP |
231 | } |
232 | ||
1e0a84ea CL |
233 | static NetClientInfo net_vhost_vdpa_info = { |
234 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
235 | .size = sizeof(VhostVDPAState), | |
846a1e85 | 236 | .receive = vhost_vdpa_receive, |
1e0a84ea CL |
237 | .cleanup = vhost_vdpa_cleanup, |
238 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
239 | .has_ufo = vhost_vdpa_has_ufo, | |
ee8a1c63 | 240 | .check_peer_type = vhost_vdpa_check_peer_type, |
1e0a84ea CL |
241 | }; |
242 | ||
2df4dd31 EP |
243 | static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) |
244 | { | |
245 | VhostIOVATree *tree = v->iova_tree; | |
246 | DMAMap needle = { | |
247 | /* | |
248 | * No need to specify size or to look for more translations since | |
249 | * this contiguous chunk was allocated by us. | |
250 | */ | |
251 | .translated_addr = (hwaddr)(uintptr_t)addr, | |
252 | }; | |
253 | const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); | |
254 | int r; | |
255 | ||
256 | if (unlikely(!map)) { | |
257 | error_report("Cannot locate expected map"); | |
258 | return; | |
259 | } | |
260 | ||
261 | r = vhost_vdpa_dma_unmap(v, map->iova, map->size + 1); | |
262 | if (unlikely(r != 0)) { | |
263 | error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); | |
264 | } | |
265 | ||
69292a8e | 266 | vhost_iova_tree_remove(tree, *map); |
2df4dd31 EP |
267 | } |
268 | ||
269 | static size_t vhost_vdpa_net_cvq_cmd_len(void) | |
270 | { | |
271 | /* | |
272 | * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. | |
273 | * In buffer is always 1 byte, so it should fit here | |
274 | */ | |
275 | return sizeof(struct virtio_net_ctrl_hdr) + | |
276 | 2 * sizeof(struct virtio_net_ctrl_mac) + | |
277 | MAC_TABLE_ENTRIES * ETH_ALEN; | |
278 | } | |
279 | ||
280 | static size_t vhost_vdpa_net_cvq_cmd_page_len(void) | |
281 | { | |
282 | return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); | |
283 | } | |
284 | ||
7a7f87e9 EP |
285 | /** Map CVQ buffer. */ |
286 | static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, | |
287 | bool write) | |
2df4dd31 EP |
288 | { |
289 | DMAMap map = {}; | |
290 | int r; | |
291 | ||
2df4dd31 | 292 | map.translated_addr = (hwaddr)(uintptr_t)buf; |
7a7f87e9 | 293 | map.size = size - 1; |
2df4dd31 EP |
294 | map.perm = write ? IOMMU_RW : IOMMU_RO, |
295 | r = vhost_iova_tree_map_alloc(v->iova_tree, &map); | |
296 | if (unlikely(r != IOVA_OK)) { | |
297 | error_report("Cannot map injected element"); | |
7a7f87e9 | 298 | return r; |
2df4dd31 EP |
299 | } |
300 | ||
301 | r = vhost_vdpa_dma_map(v, map.iova, vhost_vdpa_net_cvq_cmd_page_len(), buf, | |
302 | !write); | |
303 | if (unlikely(r < 0)) { | |
304 | goto dma_map_err; | |
305 | } | |
306 | ||
7a7f87e9 | 307 | return 0; |
2df4dd31 EP |
308 | |
309 | dma_map_err: | |
69292a8e | 310 | vhost_iova_tree_remove(v->iova_tree, map); |
7a7f87e9 | 311 | return r; |
2df4dd31 EP |
312 | } |
313 | ||
7a7f87e9 | 314 | static int vhost_vdpa_net_cvq_start(NetClientState *nc) |
2df4dd31 | 315 | { |
7a7f87e9 EP |
316 | VhostVDPAState *s; |
317 | int r; | |
2df4dd31 | 318 | |
7a7f87e9 EP |
319 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); |
320 | ||
321 | s = DO_UPCAST(VhostVDPAState, nc, nc); | |
322 | if (!s->vhost_vdpa.shadow_vqs_enabled) { | |
323 | return 0; | |
2df4dd31 EP |
324 | } |
325 | ||
7a7f87e9 EP |
326 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, |
327 | vhost_vdpa_net_cvq_cmd_page_len(), false); | |
328 | if (unlikely(r < 0)) { | |
329 | return r; | |
330 | } | |
331 | ||
17fb889f | 332 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, |
7a7f87e9 EP |
333 | vhost_vdpa_net_cvq_cmd_page_len(), true); |
334 | if (unlikely(r < 0)) { | |
2df4dd31 | 335 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); |
2df4dd31 EP |
336 | } |
337 | ||
7a7f87e9 EP |
338 | return r; |
339 | } | |
340 | ||
341 | static void vhost_vdpa_net_cvq_stop(NetClientState *nc) | |
342 | { | |
343 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
344 | ||
345 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
346 | ||
347 | if (s->vhost_vdpa.shadow_vqs_enabled) { | |
348 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); | |
17fb889f | 349 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); |
7a7f87e9 | 350 | } |
2df4dd31 EP |
351 | } |
352 | ||
be4278b6 EP |
353 | static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, |
354 | size_t in_len) | |
355 | { | |
356 | /* Buffers for the device */ | |
357 | const struct iovec out = { | |
358 | .iov_base = s->cvq_cmd_out_buffer, | |
359 | .iov_len = out_len, | |
360 | }; | |
361 | const struct iovec in = { | |
17fb889f | 362 | .iov_base = s->status, |
be4278b6 EP |
363 | .iov_len = sizeof(virtio_net_ctrl_ack), |
364 | }; | |
365 | VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); | |
366 | int r; | |
367 | ||
368 | r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); | |
369 | if (unlikely(r != 0)) { | |
370 | if (unlikely(r == -ENOSPC)) { | |
371 | qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", | |
372 | __func__); | |
373 | } | |
374 | return r; | |
375 | } | |
376 | ||
377 | /* | |
378 | * We can poll here since we've had BQL from the time we sent the | |
379 | * descriptor. Also, we need to take the answer before SVQ pulls by itself, | |
380 | * when BQL is released | |
381 | */ | |
382 | return vhost_svq_poll(svq); | |
383 | } | |
384 | ||
f73c0c43 EP |
385 | static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, |
386 | uint8_t cmd, const void *data, | |
387 | size_t data_size) | |
388 | { | |
389 | const struct virtio_net_ctrl_hdr ctrl = { | |
390 | .class = class, | |
391 | .cmd = cmd, | |
392 | }; | |
393 | ||
394 | assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); | |
395 | ||
396 | memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); | |
397 | memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); | |
398 | ||
399 | return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, | |
400 | sizeof(virtio_net_ctrl_ack)); | |
401 | } | |
402 | ||
403 | static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) | |
404 | { | |
405 | uint64_t features = n->parent_obj.guest_features; | |
406 | if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { | |
407 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, | |
408 | VIRTIO_NET_CTRL_MAC_ADDR_SET, | |
409 | n->mac, sizeof(n->mac)); | |
410 | if (unlikely(dev_written < 0)) { | |
411 | return dev_written; | |
412 | } | |
413 | ||
414 | return *s->status != VIRTIO_NET_OK; | |
415 | } | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
f64c7cda EP |
420 | static int vhost_vdpa_net_load_mq(VhostVDPAState *s, |
421 | const VirtIONet *n) | |
422 | { | |
423 | struct virtio_net_ctrl_mq mq; | |
424 | uint64_t features = n->parent_obj.guest_features; | |
425 | ssize_t dev_written; | |
426 | ||
427 | if (!(features & BIT_ULL(VIRTIO_NET_F_MQ))) { | |
428 | return 0; | |
429 | } | |
430 | ||
431 | mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); | |
432 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, | |
433 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, | |
434 | sizeof(mq)); | |
435 | if (unlikely(dev_written < 0)) { | |
436 | return dev_written; | |
437 | } | |
438 | ||
439 | return *s->status != VIRTIO_NET_OK; | |
440 | } | |
441 | ||
dd036d8d EP |
442 | static int vhost_vdpa_net_load(NetClientState *nc) |
443 | { | |
444 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
f73c0c43 | 445 | struct vhost_vdpa *v = &s->vhost_vdpa; |
dd036d8d | 446 | const VirtIONet *n; |
f73c0c43 | 447 | int r; |
dd036d8d EP |
448 | |
449 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
450 | ||
451 | if (!v->shadow_vqs_enabled) { | |
452 | return 0; | |
453 | } | |
454 | ||
455 | n = VIRTIO_NET(v->dev->vdev); | |
f73c0c43 EP |
456 | r = vhost_vdpa_net_load_mac(s, n); |
457 | if (unlikely(r < 0)) { | |
458 | return r; | |
dd036d8d | 459 | } |
f64c7cda EP |
460 | r = vhost_vdpa_net_load_mq(s, n); |
461 | if (unlikely(r)) { | |
462 | return r; | |
463 | } | |
dd036d8d EP |
464 | |
465 | return 0; | |
466 | } | |
467 | ||
f8972b56 EP |
468 | static NetClientInfo net_vhost_vdpa_cvq_info = { |
469 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
470 | .size = sizeof(VhostVDPAState), | |
471 | .receive = vhost_vdpa_receive, | |
7a7f87e9 | 472 | .start = vhost_vdpa_net_cvq_start, |
dd036d8d | 473 | .load = vhost_vdpa_net_load, |
7a7f87e9 | 474 | .stop = vhost_vdpa_net_cvq_stop, |
f8972b56 EP |
475 | .cleanup = vhost_vdpa_cleanup, |
476 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
477 | .has_ufo = vhost_vdpa_has_ufo, | |
478 | .check_peer_type = vhost_vdpa_check_peer_type, | |
479 | }; | |
480 | ||
2df4dd31 EP |
481 | /** |
482 | * Validate and copy control virtqueue commands. | |
483 | * | |
484 | * Following QEMU guidelines, we offer a copy of the buffers to the device to | |
485 | * prevent TOCTOU bugs. | |
bd907ae4 EP |
486 | */ |
487 | static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, | |
488 | VirtQueueElement *elem, | |
489 | void *opaque) | |
490 | { | |
2df4dd31 | 491 | VhostVDPAState *s = opaque; |
be4278b6 | 492 | size_t in_len; |
bd907ae4 | 493 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
7a7f87e9 EP |
494 | /* Out buffer sent to both the vdpa device and the device model */ |
495 | struct iovec out = { | |
496 | .iov_base = s->cvq_cmd_out_buffer, | |
497 | }; | |
2df4dd31 EP |
498 | /* in buffer used for device model */ |
499 | const struct iovec in = { | |
500 | .iov_base = &status, | |
501 | .iov_len = sizeof(status), | |
502 | }; | |
be4278b6 | 503 | ssize_t dev_written = -EINVAL; |
2df4dd31 | 504 | |
7a7f87e9 EP |
505 | out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, |
506 | s->cvq_cmd_out_buffer, | |
507 | vhost_vdpa_net_cvq_cmd_len()); | |
be4278b6 EP |
508 | dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); |
509 | if (unlikely(dev_written < 0)) { | |
bd907ae4 EP |
510 | goto out; |
511 | } | |
512 | ||
bd907ae4 EP |
513 | if (unlikely(dev_written < sizeof(status))) { |
514 | error_report("Insufficient written data (%zu)", dev_written); | |
2df4dd31 EP |
515 | goto out; |
516 | } | |
517 | ||
17fb889f | 518 | if (*s->status != VIRTIO_NET_OK) { |
be4278b6 | 519 | return VIRTIO_NET_ERR; |
2df4dd31 EP |
520 | } |
521 | ||
522 | status = VIRTIO_NET_ERR; | |
7a7f87e9 | 523 | virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); |
2df4dd31 EP |
524 | if (status != VIRTIO_NET_OK) { |
525 | error_report("Bad CVQ processing in model"); | |
bd907ae4 EP |
526 | } |
527 | ||
528 | out: | |
529 | in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, | |
530 | sizeof(status)); | |
531 | if (unlikely(in_len < sizeof(status))) { | |
532 | error_report("Bad device CVQ written length"); | |
533 | } | |
534 | vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); | |
535 | g_free(elem); | |
be4278b6 | 536 | return dev_written < 0 ? dev_written : 0; |
bd907ae4 EP |
537 | } |
538 | ||
539 | static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { | |
540 | .avail_handler = vhost_vdpa_net_handle_ctrl_avail, | |
541 | }; | |
542 | ||
654790b6 JW |
543 | static NetClientState *net_vhost_vdpa_init(NetClientState *peer, |
544 | const char *device, | |
545 | const char *name, | |
40237840 JW |
546 | int vdpa_device_fd, |
547 | int queue_pair_index, | |
548 | int nvqs, | |
1576dbb5 EP |
549 | bool is_datapath, |
550 | bool svq, | |
551 | VhostIOVATree *iova_tree) | |
1e0a84ea CL |
552 | { |
553 | NetClientState *nc = NULL; | |
554 | VhostVDPAState *s; | |
1e0a84ea CL |
555 | int ret = 0; |
556 | assert(name); | |
40237840 JW |
557 | if (is_datapath) { |
558 | nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, | |
559 | name); | |
560 | } else { | |
f8972b56 | 561 | nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, |
40237840 JW |
562 | device, name); |
563 | } | |
53b85d95 | 564 | qemu_set_info_str(nc, TYPE_VHOST_VDPA); |
1e0a84ea | 565 | s = DO_UPCAST(VhostVDPAState, nc, nc); |
7327813d | 566 | |
1e0a84ea | 567 | s->vhost_vdpa.device_fd = vdpa_device_fd; |
40237840 | 568 | s->vhost_vdpa.index = queue_pair_index; |
1576dbb5 EP |
569 | s->vhost_vdpa.shadow_vqs_enabled = svq; |
570 | s->vhost_vdpa.iova_tree = iova_tree; | |
bd907ae4 | 571 | if (!is_datapath) { |
2df4dd31 EP |
572 | s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(), |
573 | vhost_vdpa_net_cvq_cmd_page_len()); | |
574 | memset(s->cvq_cmd_out_buffer, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
17fb889f EP |
575 | s->status = qemu_memalign(qemu_real_host_page_size(), |
576 | vhost_vdpa_net_cvq_cmd_page_len()); | |
577 | memset(s->status, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
2df4dd31 | 578 | |
bd907ae4 EP |
579 | s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; |
580 | s->vhost_vdpa.shadow_vq_ops_opaque = s; | |
581 | } | |
40237840 | 582 | ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); |
74af5eec | 583 | if (ret) { |
74af5eec | 584 | qemu_del_net_client(nc); |
654790b6 | 585 | return NULL; |
74af5eec | 586 | } |
654790b6 | 587 | return nc; |
1e0a84ea CL |
588 | } |
589 | ||
1576dbb5 EP |
590 | static int vhost_vdpa_get_iova_range(int fd, |
591 | struct vhost_vdpa_iova_range *iova_range) | |
592 | { | |
593 | int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range); | |
594 | ||
595 | return ret < 0 ? -errno : 0; | |
596 | } | |
597 | ||
8170ab3f EP |
598 | static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) |
599 | { | |
600 | int ret = ioctl(fd, VHOST_GET_FEATURES, features); | |
601 | if (unlikely(ret < 0)) { | |
602 | error_setg_errno(errp, errno, | |
603 | "Fail to query features from vhost-vDPA device"); | |
604 | } | |
605 | return ret; | |
606 | } | |
607 | ||
608 | static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, | |
609 | int *has_cvq, Error **errp) | |
40237840 JW |
610 | { |
611 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); | |
cd523a41 | 612 | g_autofree struct vhost_vdpa_config *config = NULL; |
40237840 | 613 | __virtio16 *max_queue_pairs; |
40237840 JW |
614 | int ret; |
615 | ||
40237840 JW |
616 | if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { |
617 | *has_cvq = 1; | |
618 | } else { | |
619 | *has_cvq = 0; | |
620 | } | |
621 | ||
622 | if (features & (1 << VIRTIO_NET_F_MQ)) { | |
623 | config = g_malloc0(config_size + sizeof(*max_queue_pairs)); | |
624 | config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); | |
625 | config->len = sizeof(*max_queue_pairs); | |
626 | ||
627 | ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); | |
628 | if (ret) { | |
629 | error_setg(errp, "Fail to get config from vhost-vDPA device"); | |
630 | return -ret; | |
631 | } | |
632 | ||
633 | max_queue_pairs = (__virtio16 *)&config->buf; | |
634 | ||
635 | return lduw_le_p(max_queue_pairs); | |
636 | } | |
637 | ||
638 | return 1; | |
639 | } | |
640 | ||
1e0a84ea CL |
641 | int net_init_vhost_vdpa(const Netdev *netdev, const char *name, |
642 | NetClientState *peer, Error **errp) | |
643 | { | |
644 | const NetdevVhostVDPAOptions *opts; | |
8170ab3f | 645 | uint64_t features; |
654790b6 | 646 | int vdpa_device_fd; |
eb3cb751 | 647 | g_autofree NetClientState **ncs = NULL; |
1576dbb5 | 648 | g_autoptr(VhostIOVATree) iova_tree = NULL; |
eb3cb751 | 649 | NetClientState *nc; |
aed5da45 | 650 | int queue_pairs, r, i = 0, has_cvq = 0; |
1e0a84ea CL |
651 | |
652 | assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
653 | opts = &netdev->u.vhost_vdpa; | |
7480874a | 654 | if (!opts->vhostdev && !opts->vhostfd) { |
8801ccd0 SWL |
655 | error_setg(errp, |
656 | "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); | |
c8295404 EP |
657 | return -1; |
658 | } | |
7327813d | 659 | |
7480874a | 660 | if (opts->vhostdev && opts->vhostfd) { |
8801ccd0 SWL |
661 | error_setg(errp, |
662 | "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); | |
663 | return -1; | |
664 | } | |
665 | ||
7480874a | 666 | if (opts->vhostdev) { |
8801ccd0 SWL |
667 | vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); |
668 | if (vdpa_device_fd == -1) { | |
669 | return -errno; | |
670 | } | |
5107fd3e PM |
671 | } else { |
672 | /* has_vhostfd */ | |
8801ccd0 SWL |
673 | vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); |
674 | if (vdpa_device_fd == -1) { | |
675 | error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); | |
676 | return -1; | |
677 | } | |
7327813d JW |
678 | } |
679 | ||
8170ab3f EP |
680 | r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); |
681 | if (unlikely(r < 0)) { | |
aed5da45 | 682 | goto err; |
8170ab3f EP |
683 | } |
684 | ||
685 | queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, | |
40237840 JW |
686 | &has_cvq, errp); |
687 | if (queue_pairs < 0) { | |
7327813d | 688 | qemu_close(vdpa_device_fd); |
40237840 JW |
689 | return queue_pairs; |
690 | } | |
691 | ||
1576dbb5 EP |
692 | if (opts->x_svq) { |
693 | struct vhost_vdpa_iova_range iova_range; | |
694 | ||
36e46472 | 695 | if (!vhost_vdpa_net_valid_svq_features(features, errp)) { |
1576dbb5 EP |
696 | goto err_svq; |
697 | } | |
698 | ||
699 | vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); | |
700 | iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last); | |
701 | } | |
702 | ||
40237840 JW |
703 | ncs = g_malloc0(sizeof(*ncs) * queue_pairs); |
704 | ||
705 | for (i = 0; i < queue_pairs; i++) { | |
706 | ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 EP |
707 | vdpa_device_fd, i, 2, true, opts->x_svq, |
708 | iova_tree); | |
40237840 JW |
709 | if (!ncs[i]) |
710 | goto err; | |
7327813d JW |
711 | } |
712 | ||
40237840 JW |
713 | if (has_cvq) { |
714 | nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 EP |
715 | vdpa_device_fd, i, 1, false, |
716 | opts->x_svq, iova_tree); | |
40237840 JW |
717 | if (!nc) |
718 | goto err; | |
719 | } | |
720 | ||
1576dbb5 EP |
721 | /* iova_tree ownership belongs to last NetClientState */ |
722 | g_steal_pointer(&iova_tree); | |
654790b6 | 723 | return 0; |
40237840 JW |
724 | |
725 | err: | |
726 | if (i) { | |
9bd05507 SWL |
727 | for (i--; i >= 0; i--) { |
728 | qemu_del_net_client(ncs[i]); | |
729 | } | |
40237840 | 730 | } |
1576dbb5 EP |
731 | |
732 | err_svq: | |
40237840 | 733 | qemu_close(vdpa_device_fd); |
40237840 JW |
734 | |
735 | return -1; | |
1e0a84ea | 736 | } |