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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); | |
258a0394 | 121 | return false; |
36e46472 EP |
122 | } |
123 | ||
258a0394 | 124 | return vhost_svq_valid_features(features, errp); |
36e46472 EP |
125 | } |
126 | ||
1e0a84ea CL |
127 | static int vhost_vdpa_net_check_device_id(struct vhost_net *net) |
128 | { | |
129 | uint32_t device_id; | |
130 | int ret; | |
131 | struct vhost_dev *hdev; | |
132 | ||
133 | hdev = (struct vhost_dev *)&net->dev; | |
134 | ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); | |
135 | if (device_id != VIRTIO_ID_NET) { | |
136 | return -ENOTSUP; | |
137 | } | |
138 | return ret; | |
139 | } | |
140 | ||
40237840 JW |
141 | static int vhost_vdpa_add(NetClientState *ncs, void *be, |
142 | int queue_pair_index, int nvqs) | |
1e0a84ea CL |
143 | { |
144 | VhostNetOptions options; | |
145 | struct vhost_net *net = NULL; | |
146 | VhostVDPAState *s; | |
147 | int ret; | |
148 | ||
149 | options.backend_type = VHOST_BACKEND_TYPE_VDPA; | |
150 | assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
151 | s = DO_UPCAST(VhostVDPAState, nc, ncs); | |
152 | options.net_backend = ncs; | |
153 | options.opaque = be; | |
154 | options.busyloop_timeout = 0; | |
40237840 | 155 | options.nvqs = nvqs; |
1e0a84ea CL |
156 | |
157 | net = vhost_net_init(&options); | |
158 | if (!net) { | |
159 | error_report("failed to init vhost_net for queue"); | |
a97ef87a | 160 | goto err_init; |
1e0a84ea | 161 | } |
1e0a84ea CL |
162 | s->vhost_net = net; |
163 | ret = vhost_vdpa_net_check_device_id(net); | |
164 | if (ret) { | |
a97ef87a | 165 | goto err_check; |
1e0a84ea CL |
166 | } |
167 | return 0; | |
a97ef87a JW |
168 | err_check: |
169 | vhost_net_cleanup(net); | |
170 | g_free(net); | |
171 | err_init: | |
1e0a84ea CL |
172 | return -1; |
173 | } | |
174 | ||
175 | static void vhost_vdpa_cleanup(NetClientState *nc) | |
176 | { | |
177 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
1576dbb5 | 178 | struct vhost_dev *dev = &s->vhost_net->dev; |
1e0a84ea | 179 | |
2df4dd31 | 180 | qemu_vfree(s->cvq_cmd_out_buffer); |
17fb889f | 181 | qemu_vfree(s->status); |
1576dbb5 EP |
182 | if (dev->vq_index + dev->nvqs == dev->vq_index_end) { |
183 | g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); | |
184 | } | |
1e0a84ea CL |
185 | if (s->vhost_net) { |
186 | vhost_net_cleanup(s->vhost_net); | |
187 | g_free(s->vhost_net); | |
188 | s->vhost_net = NULL; | |
189 | } | |
57b3a7d8 CL |
190 | if (s->vhost_vdpa.device_fd >= 0) { |
191 | qemu_close(s->vhost_vdpa.device_fd); | |
192 | s->vhost_vdpa.device_fd = -1; | |
193 | } | |
1e0a84ea CL |
194 | } |
195 | ||
196 | static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) | |
197 | { | |
198 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
199 | ||
200 | return true; | |
201 | } | |
202 | ||
203 | static bool vhost_vdpa_has_ufo(NetClientState *nc) | |
204 | { | |
205 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
206 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
207 | uint64_t features = 0; | |
208 | features |= (1ULL << VIRTIO_NET_F_HOST_UFO); | |
209 | features = vhost_net_get_features(s->vhost_net, features); | |
210 | return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); | |
211 | ||
212 | } | |
213 | ||
ee8a1c63 KW |
214 | static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, |
215 | Error **errp) | |
216 | { | |
217 | const char *driver = object_class_get_name(oc); | |
218 | ||
219 | if (!g_str_has_prefix(driver, "virtio-net-")) { | |
220 | error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); | |
221 | return false; | |
222 | } | |
223 | ||
224 | return true; | |
225 | } | |
226 | ||
846a1e85 EP |
227 | /** Dummy receive in case qemu falls back to userland tap networking */ |
228 | static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, | |
229 | size_t size) | |
230 | { | |
bc5add1d | 231 | return size; |
846a1e85 EP |
232 | } |
233 | ||
1e0a84ea CL |
234 | static NetClientInfo net_vhost_vdpa_info = { |
235 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
236 | .size = sizeof(VhostVDPAState), | |
846a1e85 | 237 | .receive = vhost_vdpa_receive, |
1e0a84ea CL |
238 | .cleanup = vhost_vdpa_cleanup, |
239 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
240 | .has_ufo = vhost_vdpa_has_ufo, | |
ee8a1c63 | 241 | .check_peer_type = vhost_vdpa_check_peer_type, |
1e0a84ea CL |
242 | }; |
243 | ||
2df4dd31 EP |
244 | static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) |
245 | { | |
246 | VhostIOVATree *tree = v->iova_tree; | |
247 | DMAMap needle = { | |
248 | /* | |
249 | * No need to specify size or to look for more translations since | |
250 | * this contiguous chunk was allocated by us. | |
251 | */ | |
252 | .translated_addr = (hwaddr)(uintptr_t)addr, | |
253 | }; | |
254 | const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); | |
255 | int r; | |
256 | ||
257 | if (unlikely(!map)) { | |
258 | error_report("Cannot locate expected map"); | |
259 | return; | |
260 | } | |
261 | ||
262 | r = vhost_vdpa_dma_unmap(v, map->iova, map->size + 1); | |
263 | if (unlikely(r != 0)) { | |
264 | error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); | |
265 | } | |
266 | ||
69292a8e | 267 | vhost_iova_tree_remove(tree, *map); |
2df4dd31 EP |
268 | } |
269 | ||
270 | static size_t vhost_vdpa_net_cvq_cmd_len(void) | |
271 | { | |
272 | /* | |
273 | * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. | |
274 | * In buffer is always 1 byte, so it should fit here | |
275 | */ | |
276 | return sizeof(struct virtio_net_ctrl_hdr) + | |
277 | 2 * sizeof(struct virtio_net_ctrl_mac) + | |
278 | MAC_TABLE_ENTRIES * ETH_ALEN; | |
279 | } | |
280 | ||
281 | static size_t vhost_vdpa_net_cvq_cmd_page_len(void) | |
282 | { | |
283 | return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); | |
284 | } | |
285 | ||
7a7f87e9 EP |
286 | /** Map CVQ buffer. */ |
287 | static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, | |
288 | bool write) | |
2df4dd31 EP |
289 | { |
290 | DMAMap map = {}; | |
291 | int r; | |
292 | ||
2df4dd31 | 293 | map.translated_addr = (hwaddr)(uintptr_t)buf; |
7a7f87e9 | 294 | map.size = size - 1; |
2df4dd31 EP |
295 | map.perm = write ? IOMMU_RW : IOMMU_RO, |
296 | r = vhost_iova_tree_map_alloc(v->iova_tree, &map); | |
297 | if (unlikely(r != IOVA_OK)) { | |
298 | error_report("Cannot map injected element"); | |
7a7f87e9 | 299 | return r; |
2df4dd31 EP |
300 | } |
301 | ||
302 | r = vhost_vdpa_dma_map(v, map.iova, vhost_vdpa_net_cvq_cmd_page_len(), buf, | |
303 | !write); | |
304 | if (unlikely(r < 0)) { | |
305 | goto dma_map_err; | |
306 | } | |
307 | ||
7a7f87e9 | 308 | return 0; |
2df4dd31 EP |
309 | |
310 | dma_map_err: | |
69292a8e | 311 | vhost_iova_tree_remove(v->iova_tree, map); |
7a7f87e9 | 312 | return r; |
2df4dd31 EP |
313 | } |
314 | ||
7a7f87e9 | 315 | static int vhost_vdpa_net_cvq_start(NetClientState *nc) |
2df4dd31 | 316 | { |
7a7f87e9 EP |
317 | VhostVDPAState *s; |
318 | int r; | |
2df4dd31 | 319 | |
7a7f87e9 EP |
320 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); |
321 | ||
322 | s = DO_UPCAST(VhostVDPAState, nc, nc); | |
323 | if (!s->vhost_vdpa.shadow_vqs_enabled) { | |
324 | return 0; | |
2df4dd31 EP |
325 | } |
326 | ||
7a7f87e9 EP |
327 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, |
328 | vhost_vdpa_net_cvq_cmd_page_len(), false); | |
329 | if (unlikely(r < 0)) { | |
330 | return r; | |
331 | } | |
332 | ||
17fb889f | 333 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, |
7a7f87e9 EP |
334 | vhost_vdpa_net_cvq_cmd_page_len(), true); |
335 | if (unlikely(r < 0)) { | |
2df4dd31 | 336 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); |
2df4dd31 EP |
337 | } |
338 | ||
7a7f87e9 EP |
339 | return r; |
340 | } | |
341 | ||
342 | static void vhost_vdpa_net_cvq_stop(NetClientState *nc) | |
343 | { | |
344 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
345 | ||
346 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
347 | ||
348 | if (s->vhost_vdpa.shadow_vqs_enabled) { | |
349 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); | |
17fb889f | 350 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); |
7a7f87e9 | 351 | } |
2df4dd31 EP |
352 | } |
353 | ||
be4278b6 EP |
354 | static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, |
355 | size_t in_len) | |
356 | { | |
357 | /* Buffers for the device */ | |
358 | const struct iovec out = { | |
359 | .iov_base = s->cvq_cmd_out_buffer, | |
360 | .iov_len = out_len, | |
361 | }; | |
362 | const struct iovec in = { | |
17fb889f | 363 | .iov_base = s->status, |
be4278b6 EP |
364 | .iov_len = sizeof(virtio_net_ctrl_ack), |
365 | }; | |
366 | VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); | |
367 | int r; | |
368 | ||
369 | r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); | |
370 | if (unlikely(r != 0)) { | |
371 | if (unlikely(r == -ENOSPC)) { | |
372 | qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", | |
373 | __func__); | |
374 | } | |
375 | return r; | |
376 | } | |
377 | ||
378 | /* | |
379 | * We can poll here since we've had BQL from the time we sent the | |
380 | * descriptor. Also, we need to take the answer before SVQ pulls by itself, | |
381 | * when BQL is released | |
382 | */ | |
383 | return vhost_svq_poll(svq); | |
384 | } | |
385 | ||
f73c0c43 EP |
386 | static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, |
387 | uint8_t cmd, const void *data, | |
388 | size_t data_size) | |
389 | { | |
390 | const struct virtio_net_ctrl_hdr ctrl = { | |
391 | .class = class, | |
392 | .cmd = cmd, | |
393 | }; | |
394 | ||
395 | assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); | |
396 | ||
397 | memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); | |
398 | memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); | |
399 | ||
400 | return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, | |
401 | sizeof(virtio_net_ctrl_ack)); | |
402 | } | |
403 | ||
404 | static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) | |
405 | { | |
406 | uint64_t features = n->parent_obj.guest_features; | |
407 | if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { | |
408 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, | |
409 | VIRTIO_NET_CTRL_MAC_ADDR_SET, | |
410 | n->mac, sizeof(n->mac)); | |
411 | if (unlikely(dev_written < 0)) { | |
412 | return dev_written; | |
413 | } | |
414 | ||
415 | return *s->status != VIRTIO_NET_OK; | |
416 | } | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
f64c7cda EP |
421 | static int vhost_vdpa_net_load_mq(VhostVDPAState *s, |
422 | const VirtIONet *n) | |
423 | { | |
424 | struct virtio_net_ctrl_mq mq; | |
425 | uint64_t features = n->parent_obj.guest_features; | |
426 | ssize_t dev_written; | |
427 | ||
428 | if (!(features & BIT_ULL(VIRTIO_NET_F_MQ))) { | |
429 | return 0; | |
430 | } | |
431 | ||
432 | mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); | |
433 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, | |
434 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, | |
435 | sizeof(mq)); | |
436 | if (unlikely(dev_written < 0)) { | |
437 | return dev_written; | |
438 | } | |
439 | ||
440 | return *s->status != VIRTIO_NET_OK; | |
441 | } | |
442 | ||
dd036d8d EP |
443 | static int vhost_vdpa_net_load(NetClientState *nc) |
444 | { | |
445 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
f73c0c43 | 446 | struct vhost_vdpa *v = &s->vhost_vdpa; |
dd036d8d | 447 | const VirtIONet *n; |
f73c0c43 | 448 | int r; |
dd036d8d EP |
449 | |
450 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
451 | ||
452 | if (!v->shadow_vqs_enabled) { | |
453 | return 0; | |
454 | } | |
455 | ||
456 | n = VIRTIO_NET(v->dev->vdev); | |
f73c0c43 EP |
457 | r = vhost_vdpa_net_load_mac(s, n); |
458 | if (unlikely(r < 0)) { | |
459 | return r; | |
dd036d8d | 460 | } |
f64c7cda EP |
461 | r = vhost_vdpa_net_load_mq(s, n); |
462 | if (unlikely(r)) { | |
463 | return r; | |
464 | } | |
dd036d8d EP |
465 | |
466 | return 0; | |
467 | } | |
468 | ||
f8972b56 EP |
469 | static NetClientInfo net_vhost_vdpa_cvq_info = { |
470 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
471 | .size = sizeof(VhostVDPAState), | |
472 | .receive = vhost_vdpa_receive, | |
7a7f87e9 | 473 | .start = vhost_vdpa_net_cvq_start, |
dd036d8d | 474 | .load = vhost_vdpa_net_load, |
7a7f87e9 | 475 | .stop = vhost_vdpa_net_cvq_stop, |
f8972b56 EP |
476 | .cleanup = vhost_vdpa_cleanup, |
477 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
478 | .has_ufo = vhost_vdpa_has_ufo, | |
479 | .check_peer_type = vhost_vdpa_check_peer_type, | |
480 | }; | |
481 | ||
2df4dd31 EP |
482 | /** |
483 | * Validate and copy control virtqueue commands. | |
484 | * | |
485 | * Following QEMU guidelines, we offer a copy of the buffers to the device to | |
486 | * prevent TOCTOU bugs. | |
bd907ae4 EP |
487 | */ |
488 | static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, | |
489 | VirtQueueElement *elem, | |
490 | void *opaque) | |
491 | { | |
2df4dd31 | 492 | VhostVDPAState *s = opaque; |
be4278b6 | 493 | size_t in_len; |
bd907ae4 | 494 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
7a7f87e9 EP |
495 | /* Out buffer sent to both the vdpa device and the device model */ |
496 | struct iovec out = { | |
497 | .iov_base = s->cvq_cmd_out_buffer, | |
498 | }; | |
2df4dd31 EP |
499 | /* in buffer used for device model */ |
500 | const struct iovec in = { | |
501 | .iov_base = &status, | |
502 | .iov_len = sizeof(status), | |
503 | }; | |
be4278b6 | 504 | ssize_t dev_written = -EINVAL; |
2df4dd31 | 505 | |
7a7f87e9 EP |
506 | out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, |
507 | s->cvq_cmd_out_buffer, | |
508 | vhost_vdpa_net_cvq_cmd_len()); | |
be4278b6 EP |
509 | dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); |
510 | if (unlikely(dev_written < 0)) { | |
bd907ae4 EP |
511 | goto out; |
512 | } | |
513 | ||
bd907ae4 EP |
514 | if (unlikely(dev_written < sizeof(status))) { |
515 | error_report("Insufficient written data (%zu)", dev_written); | |
2df4dd31 EP |
516 | goto out; |
517 | } | |
518 | ||
17fb889f | 519 | if (*s->status != VIRTIO_NET_OK) { |
be4278b6 | 520 | return VIRTIO_NET_ERR; |
2df4dd31 EP |
521 | } |
522 | ||
523 | status = VIRTIO_NET_ERR; | |
7a7f87e9 | 524 | virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); |
2df4dd31 EP |
525 | if (status != VIRTIO_NET_OK) { |
526 | error_report("Bad CVQ processing in model"); | |
bd907ae4 EP |
527 | } |
528 | ||
529 | out: | |
530 | in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, | |
531 | sizeof(status)); | |
532 | if (unlikely(in_len < sizeof(status))) { | |
533 | error_report("Bad device CVQ written length"); | |
534 | } | |
535 | vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); | |
536 | g_free(elem); | |
be4278b6 | 537 | return dev_written < 0 ? dev_written : 0; |
bd907ae4 EP |
538 | } |
539 | ||
540 | static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { | |
541 | .avail_handler = vhost_vdpa_net_handle_ctrl_avail, | |
542 | }; | |
543 | ||
654790b6 | 544 | static NetClientState *net_vhost_vdpa_init(NetClientState *peer, |
a585fad2 EP |
545 | const char *device, |
546 | const char *name, | |
547 | int vdpa_device_fd, | |
548 | int queue_pair_index, | |
549 | int nvqs, | |
550 | bool is_datapath, | |
551 | bool svq, | |
552 | struct vhost_vdpa_iova_range iova_range, | |
553 | VhostIOVATree *iova_tree) | |
1e0a84ea CL |
554 | { |
555 | NetClientState *nc = NULL; | |
556 | VhostVDPAState *s; | |
1e0a84ea CL |
557 | int ret = 0; |
558 | assert(name); | |
40237840 JW |
559 | if (is_datapath) { |
560 | nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, | |
561 | name); | |
562 | } else { | |
f8972b56 | 563 | nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, |
40237840 JW |
564 | device, name); |
565 | } | |
53b85d95 | 566 | qemu_set_info_str(nc, TYPE_VHOST_VDPA); |
1e0a84ea | 567 | s = DO_UPCAST(VhostVDPAState, nc, nc); |
7327813d | 568 | |
1e0a84ea | 569 | s->vhost_vdpa.device_fd = vdpa_device_fd; |
40237840 | 570 | s->vhost_vdpa.index = queue_pair_index; |
1576dbb5 | 571 | s->vhost_vdpa.shadow_vqs_enabled = svq; |
a585fad2 | 572 | s->vhost_vdpa.iova_range = iova_range; |
1576dbb5 | 573 | s->vhost_vdpa.iova_tree = iova_tree; |
bd907ae4 | 574 | if (!is_datapath) { |
2df4dd31 EP |
575 | s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(), |
576 | vhost_vdpa_net_cvq_cmd_page_len()); | |
577 | memset(s->cvq_cmd_out_buffer, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
17fb889f EP |
578 | s->status = qemu_memalign(qemu_real_host_page_size(), |
579 | vhost_vdpa_net_cvq_cmd_page_len()); | |
580 | memset(s->status, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
2df4dd31 | 581 | |
bd907ae4 EP |
582 | s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; |
583 | s->vhost_vdpa.shadow_vq_ops_opaque = s; | |
584 | } | |
40237840 | 585 | ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); |
74af5eec | 586 | if (ret) { |
74af5eec | 587 | qemu_del_net_client(nc); |
654790b6 | 588 | return NULL; |
74af5eec | 589 | } |
654790b6 | 590 | return nc; |
1e0a84ea CL |
591 | } |
592 | ||
1576dbb5 EP |
593 | static int vhost_vdpa_get_iova_range(int fd, |
594 | struct vhost_vdpa_iova_range *iova_range) | |
595 | { | |
596 | int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range); | |
597 | ||
598 | return ret < 0 ? -errno : 0; | |
599 | } | |
600 | ||
8170ab3f EP |
601 | static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) |
602 | { | |
603 | int ret = ioctl(fd, VHOST_GET_FEATURES, features); | |
604 | if (unlikely(ret < 0)) { | |
605 | error_setg_errno(errp, errno, | |
606 | "Fail to query features from vhost-vDPA device"); | |
607 | } | |
608 | return ret; | |
609 | } | |
610 | ||
611 | static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, | |
612 | int *has_cvq, Error **errp) | |
40237840 JW |
613 | { |
614 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); | |
cd523a41 | 615 | g_autofree struct vhost_vdpa_config *config = NULL; |
40237840 | 616 | __virtio16 *max_queue_pairs; |
40237840 JW |
617 | int ret; |
618 | ||
40237840 JW |
619 | if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { |
620 | *has_cvq = 1; | |
621 | } else { | |
622 | *has_cvq = 0; | |
623 | } | |
624 | ||
625 | if (features & (1 << VIRTIO_NET_F_MQ)) { | |
626 | config = g_malloc0(config_size + sizeof(*max_queue_pairs)); | |
627 | config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); | |
628 | config->len = sizeof(*max_queue_pairs); | |
629 | ||
630 | ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); | |
631 | if (ret) { | |
632 | error_setg(errp, "Fail to get config from vhost-vDPA device"); | |
633 | return -ret; | |
634 | } | |
635 | ||
636 | max_queue_pairs = (__virtio16 *)&config->buf; | |
637 | ||
638 | return lduw_le_p(max_queue_pairs); | |
639 | } | |
640 | ||
641 | return 1; | |
642 | } | |
643 | ||
1e0a84ea CL |
644 | int net_init_vhost_vdpa(const Netdev *netdev, const char *name, |
645 | NetClientState *peer, Error **errp) | |
646 | { | |
647 | const NetdevVhostVDPAOptions *opts; | |
8170ab3f | 648 | uint64_t features; |
654790b6 | 649 | int vdpa_device_fd; |
eb3cb751 | 650 | g_autofree NetClientState **ncs = NULL; |
1576dbb5 | 651 | g_autoptr(VhostIOVATree) iova_tree = NULL; |
a585fad2 | 652 | struct vhost_vdpa_iova_range iova_range; |
eb3cb751 | 653 | NetClientState *nc; |
aed5da45 | 654 | int queue_pairs, r, i = 0, has_cvq = 0; |
1e0a84ea CL |
655 | |
656 | assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
657 | opts = &netdev->u.vhost_vdpa; | |
7480874a | 658 | if (!opts->vhostdev && !opts->vhostfd) { |
8801ccd0 SWL |
659 | error_setg(errp, |
660 | "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); | |
c8295404 EP |
661 | return -1; |
662 | } | |
7327813d | 663 | |
7480874a | 664 | if (opts->vhostdev && opts->vhostfd) { |
8801ccd0 SWL |
665 | error_setg(errp, |
666 | "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); | |
667 | return -1; | |
668 | } | |
669 | ||
7480874a | 670 | if (opts->vhostdev) { |
8801ccd0 SWL |
671 | vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); |
672 | if (vdpa_device_fd == -1) { | |
673 | return -errno; | |
674 | } | |
5107fd3e PM |
675 | } else { |
676 | /* has_vhostfd */ | |
8801ccd0 SWL |
677 | vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); |
678 | if (vdpa_device_fd == -1) { | |
679 | error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); | |
680 | return -1; | |
681 | } | |
7327813d JW |
682 | } |
683 | ||
8170ab3f EP |
684 | r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); |
685 | if (unlikely(r < 0)) { | |
aed5da45 | 686 | goto err; |
8170ab3f EP |
687 | } |
688 | ||
689 | queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, | |
40237840 JW |
690 | &has_cvq, errp); |
691 | if (queue_pairs < 0) { | |
7327813d | 692 | qemu_close(vdpa_device_fd); |
40237840 JW |
693 | return queue_pairs; |
694 | } | |
695 | ||
a585fad2 | 696 | vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); |
1576dbb5 | 697 | if (opts->x_svq) { |
36e46472 | 698 | if (!vhost_vdpa_net_valid_svq_features(features, errp)) { |
1576dbb5 EP |
699 | goto err_svq; |
700 | } | |
701 | ||
1576dbb5 EP |
702 | iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last); |
703 | } | |
704 | ||
40237840 JW |
705 | ncs = g_malloc0(sizeof(*ncs) * queue_pairs); |
706 | ||
707 | for (i = 0; i < queue_pairs; i++) { | |
708 | ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 709 | vdpa_device_fd, i, 2, true, opts->x_svq, |
a585fad2 | 710 | iova_range, iova_tree); |
40237840 JW |
711 | if (!ncs[i]) |
712 | goto err; | |
7327813d JW |
713 | } |
714 | ||
40237840 JW |
715 | if (has_cvq) { |
716 | nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 717 | vdpa_device_fd, i, 1, false, |
a585fad2 | 718 | opts->x_svq, iova_range, iova_tree); |
40237840 JW |
719 | if (!nc) |
720 | goto err; | |
721 | } | |
722 | ||
1576dbb5 EP |
723 | /* iova_tree ownership belongs to last NetClientState */ |
724 | g_steal_pointer(&iova_tree); | |
654790b6 | 725 | return 0; |
40237840 JW |
726 | |
727 | err: | |
728 | if (i) { | |
9bd05507 SWL |
729 | for (i--; i >= 0; i--) { |
730 | qemu_del_net_client(ncs[i]); | |
731 | } | |
40237840 | 732 | } |
1576dbb5 EP |
733 | |
734 | err_svq: | |
40237840 | 735 | qemu_close(vdpa_device_fd); |
40237840 JW |
736 | |
737 | return -1; | |
1e0a84ea | 738 | } |