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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 | ||
7f211a28 EP |
41 | /* The device always have SVQ enabled */ |
42 | bool always_svq; | |
1e0a84ea CL |
43 | bool started; |
44 | } VhostVDPAState; | |
45 | ||
46 | const int vdpa_feature_bits[] = { | |
47 | VIRTIO_F_NOTIFY_ON_EMPTY, | |
48 | VIRTIO_RING_F_INDIRECT_DESC, | |
49 | VIRTIO_RING_F_EVENT_IDX, | |
50 | VIRTIO_F_ANY_LAYOUT, | |
51 | VIRTIO_F_VERSION_1, | |
52 | VIRTIO_NET_F_CSUM, | |
53 | VIRTIO_NET_F_GUEST_CSUM, | |
54 | VIRTIO_NET_F_GSO, | |
55 | VIRTIO_NET_F_GUEST_TSO4, | |
56 | VIRTIO_NET_F_GUEST_TSO6, | |
57 | VIRTIO_NET_F_GUEST_ECN, | |
58 | VIRTIO_NET_F_GUEST_UFO, | |
59 | VIRTIO_NET_F_HOST_TSO4, | |
60 | VIRTIO_NET_F_HOST_TSO6, | |
61 | VIRTIO_NET_F_HOST_ECN, | |
62 | VIRTIO_NET_F_HOST_UFO, | |
63 | VIRTIO_NET_F_MRG_RXBUF, | |
64 | VIRTIO_NET_F_MTU, | |
40237840 JW |
65 | VIRTIO_NET_F_CTRL_RX, |
66 | VIRTIO_NET_F_CTRL_RX_EXTRA, | |
67 | VIRTIO_NET_F_CTRL_VLAN, | |
40237840 JW |
68 | VIRTIO_NET_F_CTRL_MAC_ADDR, |
69 | VIRTIO_NET_F_RSS, | |
70 | VIRTIO_NET_F_MQ, | |
71 | VIRTIO_NET_F_CTRL_VQ, | |
1e0a84ea CL |
72 | VIRTIO_F_IOMMU_PLATFORM, |
73 | VIRTIO_F_RING_PACKED, | |
562a7d23 | 74 | VIRTIO_F_RING_RESET, |
0145c393 AM |
75 | VIRTIO_NET_F_RSS, |
76 | VIRTIO_NET_F_HASH_REPORT, | |
1e0a84ea | 77 | VIRTIO_NET_F_GUEST_ANNOUNCE, |
9aa47edd | 78 | VIRTIO_NET_F_STATUS, |
1e0a84ea CL |
79 | VHOST_INVALID_FEATURE_BIT |
80 | }; | |
81 | ||
1576dbb5 EP |
82 | /** Supported device specific feature bits with SVQ */ |
83 | static const uint64_t vdpa_svq_device_features = | |
84 | BIT_ULL(VIRTIO_NET_F_CSUM) | | |
85 | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | | |
86 | BIT_ULL(VIRTIO_NET_F_MTU) | | |
87 | BIT_ULL(VIRTIO_NET_F_MAC) | | |
88 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | | |
89 | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | | |
90 | BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | | |
91 | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | | |
92 | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | | |
93 | BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | | |
94 | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | | |
95 | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | | |
96 | BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | | |
97 | BIT_ULL(VIRTIO_NET_F_STATUS) | | |
98 | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | | |
72b99a87 | 99 | BIT_ULL(VIRTIO_NET_F_MQ) | |
1576dbb5 EP |
100 | BIT_ULL(VIRTIO_F_ANY_LAYOUT) | |
101 | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | | |
102 | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | | |
103 | BIT_ULL(VIRTIO_NET_F_STANDBY); | |
104 | ||
1e0a84ea CL |
105 | VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) |
106 | { | |
107 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
108 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
109 | return s->vhost_net; | |
110 | } | |
111 | ||
36e46472 EP |
112 | static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) |
113 | { | |
114 | uint64_t invalid_dev_features = | |
115 | features & ~vdpa_svq_device_features & | |
116 | /* Transport are all accepted at this point */ | |
117 | ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, | |
118 | VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); | |
119 | ||
120 | if (invalid_dev_features) { | |
121 | error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, | |
122 | invalid_dev_features); | |
258a0394 | 123 | return false; |
36e46472 EP |
124 | } |
125 | ||
258a0394 | 126 | return vhost_svq_valid_features(features, errp); |
36e46472 EP |
127 | } |
128 | ||
1e0a84ea CL |
129 | static int vhost_vdpa_net_check_device_id(struct vhost_net *net) |
130 | { | |
131 | uint32_t device_id; | |
132 | int ret; | |
133 | struct vhost_dev *hdev; | |
134 | ||
135 | hdev = (struct vhost_dev *)&net->dev; | |
136 | ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); | |
137 | if (device_id != VIRTIO_ID_NET) { | |
138 | return -ENOTSUP; | |
139 | } | |
140 | return ret; | |
141 | } | |
142 | ||
40237840 JW |
143 | static int vhost_vdpa_add(NetClientState *ncs, void *be, |
144 | int queue_pair_index, int nvqs) | |
1e0a84ea CL |
145 | { |
146 | VhostNetOptions options; | |
147 | struct vhost_net *net = NULL; | |
148 | VhostVDPAState *s; | |
149 | int ret; | |
150 | ||
151 | options.backend_type = VHOST_BACKEND_TYPE_VDPA; | |
152 | assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
153 | s = DO_UPCAST(VhostVDPAState, nc, ncs); | |
154 | options.net_backend = ncs; | |
155 | options.opaque = be; | |
156 | options.busyloop_timeout = 0; | |
40237840 | 157 | options.nvqs = nvqs; |
1e0a84ea CL |
158 | |
159 | net = vhost_net_init(&options); | |
160 | if (!net) { | |
161 | error_report("failed to init vhost_net for queue"); | |
a97ef87a | 162 | goto err_init; |
1e0a84ea | 163 | } |
1e0a84ea CL |
164 | s->vhost_net = net; |
165 | ret = vhost_vdpa_net_check_device_id(net); | |
166 | if (ret) { | |
a97ef87a | 167 | goto err_check; |
1e0a84ea CL |
168 | } |
169 | return 0; | |
a97ef87a JW |
170 | err_check: |
171 | vhost_net_cleanup(net); | |
172 | g_free(net); | |
173 | err_init: | |
1e0a84ea CL |
174 | return -1; |
175 | } | |
176 | ||
177 | static void vhost_vdpa_cleanup(NetClientState *nc) | |
178 | { | |
179 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
1576dbb5 | 180 | struct vhost_dev *dev = &s->vhost_net->dev; |
1e0a84ea | 181 | |
2df4dd31 | 182 | qemu_vfree(s->cvq_cmd_out_buffer); |
17fb889f | 183 | qemu_vfree(s->status); |
1576dbb5 EP |
184 | if (dev->vq_index + dev->nvqs == dev->vq_index_end) { |
185 | g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); | |
186 | } | |
1e0a84ea CL |
187 | if (s->vhost_net) { |
188 | vhost_net_cleanup(s->vhost_net); | |
189 | g_free(s->vhost_net); | |
190 | s->vhost_net = NULL; | |
191 | } | |
57b3a7d8 CL |
192 | if (s->vhost_vdpa.device_fd >= 0) { |
193 | qemu_close(s->vhost_vdpa.device_fd); | |
194 | s->vhost_vdpa.device_fd = -1; | |
195 | } | |
1e0a84ea CL |
196 | } |
197 | ||
198 | static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) | |
199 | { | |
200 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
201 | ||
202 | return true; | |
203 | } | |
204 | ||
205 | static bool vhost_vdpa_has_ufo(NetClientState *nc) | |
206 | { | |
207 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
208 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
209 | uint64_t features = 0; | |
210 | features |= (1ULL << VIRTIO_NET_F_HOST_UFO); | |
211 | features = vhost_net_get_features(s->vhost_net, features); | |
212 | return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); | |
213 | ||
214 | } | |
215 | ||
ee8a1c63 KW |
216 | static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, |
217 | Error **errp) | |
218 | { | |
219 | const char *driver = object_class_get_name(oc); | |
220 | ||
221 | if (!g_str_has_prefix(driver, "virtio-net-")) { | |
222 | error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); | |
223 | return false; | |
224 | } | |
225 | ||
226 | return true; | |
227 | } | |
228 | ||
846a1e85 EP |
229 | /** Dummy receive in case qemu falls back to userland tap networking */ |
230 | static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, | |
231 | size_t size) | |
232 | { | |
bc5add1d | 233 | return size; |
846a1e85 EP |
234 | } |
235 | ||
1e0a84ea CL |
236 | static NetClientInfo net_vhost_vdpa_info = { |
237 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
238 | .size = sizeof(VhostVDPAState), | |
846a1e85 | 239 | .receive = vhost_vdpa_receive, |
1e0a84ea CL |
240 | .cleanup = vhost_vdpa_cleanup, |
241 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
242 | .has_ufo = vhost_vdpa_has_ufo, | |
ee8a1c63 | 243 | .check_peer_type = vhost_vdpa_check_peer_type, |
1e0a84ea CL |
244 | }; |
245 | ||
2df4dd31 EP |
246 | static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) |
247 | { | |
248 | VhostIOVATree *tree = v->iova_tree; | |
249 | DMAMap needle = { | |
250 | /* | |
251 | * No need to specify size or to look for more translations since | |
252 | * this contiguous chunk was allocated by us. | |
253 | */ | |
254 | .translated_addr = (hwaddr)(uintptr_t)addr, | |
255 | }; | |
256 | const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); | |
257 | int r; | |
258 | ||
259 | if (unlikely(!map)) { | |
260 | error_report("Cannot locate expected map"); | |
261 | return; | |
262 | } | |
263 | ||
cd831ed5 | 264 | r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); |
2df4dd31 EP |
265 | if (unlikely(r != 0)) { |
266 | error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); | |
267 | } | |
268 | ||
69292a8e | 269 | vhost_iova_tree_remove(tree, *map); |
2df4dd31 EP |
270 | } |
271 | ||
272 | static size_t vhost_vdpa_net_cvq_cmd_len(void) | |
273 | { | |
274 | /* | |
275 | * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. | |
276 | * In buffer is always 1 byte, so it should fit here | |
277 | */ | |
278 | return sizeof(struct virtio_net_ctrl_hdr) + | |
279 | 2 * sizeof(struct virtio_net_ctrl_mac) + | |
280 | MAC_TABLE_ENTRIES * ETH_ALEN; | |
281 | } | |
282 | ||
283 | static size_t vhost_vdpa_net_cvq_cmd_page_len(void) | |
284 | { | |
285 | return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); | |
286 | } | |
287 | ||
7a7f87e9 EP |
288 | /** Map CVQ buffer. */ |
289 | static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, | |
290 | bool write) | |
2df4dd31 EP |
291 | { |
292 | DMAMap map = {}; | |
293 | int r; | |
294 | ||
2df4dd31 | 295 | map.translated_addr = (hwaddr)(uintptr_t)buf; |
7a7f87e9 | 296 | map.size = size - 1; |
2df4dd31 EP |
297 | map.perm = write ? IOMMU_RW : IOMMU_RO, |
298 | r = vhost_iova_tree_map_alloc(v->iova_tree, &map); | |
299 | if (unlikely(r != IOVA_OK)) { | |
300 | error_report("Cannot map injected element"); | |
7a7f87e9 | 301 | return r; |
2df4dd31 EP |
302 | } |
303 | ||
cd831ed5 EP |
304 | r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, |
305 | vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); | |
2df4dd31 EP |
306 | if (unlikely(r < 0)) { |
307 | goto dma_map_err; | |
308 | } | |
309 | ||
7a7f87e9 | 310 | return 0; |
2df4dd31 EP |
311 | |
312 | dma_map_err: | |
69292a8e | 313 | vhost_iova_tree_remove(v->iova_tree, map); |
7a7f87e9 | 314 | return r; |
2df4dd31 EP |
315 | } |
316 | ||
7a7f87e9 | 317 | static int vhost_vdpa_net_cvq_start(NetClientState *nc) |
2df4dd31 | 318 | { |
7a7f87e9 EP |
319 | VhostVDPAState *s; |
320 | int r; | |
2df4dd31 | 321 | |
7a7f87e9 EP |
322 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); |
323 | ||
324 | s = DO_UPCAST(VhostVDPAState, nc, nc); | |
325 | if (!s->vhost_vdpa.shadow_vqs_enabled) { | |
326 | return 0; | |
2df4dd31 EP |
327 | } |
328 | ||
7a7f87e9 EP |
329 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, |
330 | vhost_vdpa_net_cvq_cmd_page_len(), false); | |
331 | if (unlikely(r < 0)) { | |
332 | return r; | |
333 | } | |
334 | ||
17fb889f | 335 | r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, |
7a7f87e9 EP |
336 | vhost_vdpa_net_cvq_cmd_page_len(), true); |
337 | if (unlikely(r < 0)) { | |
2df4dd31 | 338 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); |
2df4dd31 EP |
339 | } |
340 | ||
7a7f87e9 EP |
341 | return r; |
342 | } | |
343 | ||
344 | static void vhost_vdpa_net_cvq_stop(NetClientState *nc) | |
345 | { | |
346 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
347 | ||
348 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
349 | ||
350 | if (s->vhost_vdpa.shadow_vqs_enabled) { | |
351 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); | |
17fb889f | 352 | vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); |
7a7f87e9 | 353 | } |
2df4dd31 EP |
354 | } |
355 | ||
be4278b6 EP |
356 | static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, |
357 | size_t in_len) | |
358 | { | |
359 | /* Buffers for the device */ | |
360 | const struct iovec out = { | |
361 | .iov_base = s->cvq_cmd_out_buffer, | |
362 | .iov_len = out_len, | |
363 | }; | |
364 | const struct iovec in = { | |
17fb889f | 365 | .iov_base = s->status, |
be4278b6 EP |
366 | .iov_len = sizeof(virtio_net_ctrl_ack), |
367 | }; | |
368 | VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); | |
369 | int r; | |
370 | ||
371 | r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); | |
372 | if (unlikely(r != 0)) { | |
373 | if (unlikely(r == -ENOSPC)) { | |
374 | qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", | |
375 | __func__); | |
376 | } | |
377 | return r; | |
378 | } | |
379 | ||
380 | /* | |
381 | * We can poll here since we've had BQL from the time we sent the | |
382 | * descriptor. Also, we need to take the answer before SVQ pulls by itself, | |
383 | * when BQL is released | |
384 | */ | |
385 | return vhost_svq_poll(svq); | |
386 | } | |
387 | ||
f73c0c43 EP |
388 | static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, |
389 | uint8_t cmd, const void *data, | |
390 | size_t data_size) | |
391 | { | |
392 | const struct virtio_net_ctrl_hdr ctrl = { | |
393 | .class = class, | |
394 | .cmd = cmd, | |
395 | }; | |
396 | ||
397 | assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); | |
398 | ||
399 | memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); | |
400 | memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); | |
401 | ||
402 | return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, | |
403 | sizeof(virtio_net_ctrl_ack)); | |
404 | } | |
405 | ||
406 | static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) | |
407 | { | |
408 | uint64_t features = n->parent_obj.guest_features; | |
409 | if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { | |
410 | ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, | |
411 | VIRTIO_NET_CTRL_MAC_ADDR_SET, | |
412 | n->mac, sizeof(n->mac)); | |
413 | if (unlikely(dev_written < 0)) { | |
414 | return dev_written; | |
415 | } | |
416 | ||
417 | return *s->status != VIRTIO_NET_OK; | |
418 | } | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
f64c7cda EP |
423 | static int vhost_vdpa_net_load_mq(VhostVDPAState *s, |
424 | const VirtIONet *n) | |
425 | { | |
426 | struct virtio_net_ctrl_mq mq; | |
427 | uint64_t features = n->parent_obj.guest_features; | |
428 | ssize_t dev_written; | |
429 | ||
430 | if (!(features & BIT_ULL(VIRTIO_NET_F_MQ))) { | |
431 | return 0; | |
432 | } | |
433 | ||
434 | mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); | |
435 | dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, | |
436 | VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, | |
437 | sizeof(mq)); | |
438 | if (unlikely(dev_written < 0)) { | |
439 | return dev_written; | |
440 | } | |
441 | ||
442 | return *s->status != VIRTIO_NET_OK; | |
443 | } | |
444 | ||
dd036d8d EP |
445 | static int vhost_vdpa_net_load(NetClientState *nc) |
446 | { | |
447 | VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); | |
f73c0c43 | 448 | struct vhost_vdpa *v = &s->vhost_vdpa; |
dd036d8d | 449 | const VirtIONet *n; |
f73c0c43 | 450 | int r; |
dd036d8d EP |
451 | |
452 | assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
453 | ||
454 | if (!v->shadow_vqs_enabled) { | |
455 | return 0; | |
456 | } | |
457 | ||
458 | n = VIRTIO_NET(v->dev->vdev); | |
f73c0c43 EP |
459 | r = vhost_vdpa_net_load_mac(s, n); |
460 | if (unlikely(r < 0)) { | |
461 | return r; | |
dd036d8d | 462 | } |
f64c7cda EP |
463 | r = vhost_vdpa_net_load_mq(s, n); |
464 | if (unlikely(r)) { | |
465 | return r; | |
466 | } | |
dd036d8d EP |
467 | |
468 | return 0; | |
469 | } | |
470 | ||
f8972b56 EP |
471 | static NetClientInfo net_vhost_vdpa_cvq_info = { |
472 | .type = NET_CLIENT_DRIVER_VHOST_VDPA, | |
473 | .size = sizeof(VhostVDPAState), | |
474 | .receive = vhost_vdpa_receive, | |
7a7f87e9 | 475 | .start = vhost_vdpa_net_cvq_start, |
dd036d8d | 476 | .load = vhost_vdpa_net_load, |
7a7f87e9 | 477 | .stop = vhost_vdpa_net_cvq_stop, |
f8972b56 EP |
478 | .cleanup = vhost_vdpa_cleanup, |
479 | .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, | |
480 | .has_ufo = vhost_vdpa_has_ufo, | |
481 | .check_peer_type = vhost_vdpa_check_peer_type, | |
482 | }; | |
483 | ||
2df4dd31 EP |
484 | /** |
485 | * Validate and copy control virtqueue commands. | |
486 | * | |
487 | * Following QEMU guidelines, we offer a copy of the buffers to the device to | |
488 | * prevent TOCTOU bugs. | |
bd907ae4 EP |
489 | */ |
490 | static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, | |
491 | VirtQueueElement *elem, | |
492 | void *opaque) | |
493 | { | |
2df4dd31 | 494 | VhostVDPAState *s = opaque; |
be4278b6 | 495 | size_t in_len; |
bd907ae4 | 496 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
7a7f87e9 EP |
497 | /* Out buffer sent to both the vdpa device and the device model */ |
498 | struct iovec out = { | |
499 | .iov_base = s->cvq_cmd_out_buffer, | |
500 | }; | |
2df4dd31 EP |
501 | /* in buffer used for device model */ |
502 | const struct iovec in = { | |
503 | .iov_base = &status, | |
504 | .iov_len = sizeof(status), | |
505 | }; | |
be4278b6 | 506 | ssize_t dev_written = -EINVAL; |
2df4dd31 | 507 | |
7a7f87e9 EP |
508 | out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, |
509 | s->cvq_cmd_out_buffer, | |
510 | vhost_vdpa_net_cvq_cmd_len()); | |
be4278b6 EP |
511 | dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); |
512 | if (unlikely(dev_written < 0)) { | |
bd907ae4 EP |
513 | goto out; |
514 | } | |
515 | ||
bd907ae4 EP |
516 | if (unlikely(dev_written < sizeof(status))) { |
517 | error_report("Insufficient written data (%zu)", dev_written); | |
2df4dd31 EP |
518 | goto out; |
519 | } | |
520 | ||
17fb889f | 521 | if (*s->status != VIRTIO_NET_OK) { |
be4278b6 | 522 | return VIRTIO_NET_ERR; |
2df4dd31 EP |
523 | } |
524 | ||
525 | status = VIRTIO_NET_ERR; | |
7a7f87e9 | 526 | virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); |
2df4dd31 EP |
527 | if (status != VIRTIO_NET_OK) { |
528 | error_report("Bad CVQ processing in model"); | |
bd907ae4 EP |
529 | } |
530 | ||
531 | out: | |
532 | in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, | |
533 | sizeof(status)); | |
534 | if (unlikely(in_len < sizeof(status))) { | |
535 | error_report("Bad device CVQ written length"); | |
536 | } | |
537 | vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); | |
538 | g_free(elem); | |
be4278b6 | 539 | return dev_written < 0 ? dev_written : 0; |
bd907ae4 EP |
540 | } |
541 | ||
542 | static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { | |
543 | .avail_handler = vhost_vdpa_net_handle_ctrl_avail, | |
544 | }; | |
545 | ||
654790b6 | 546 | static NetClientState *net_vhost_vdpa_init(NetClientState *peer, |
a585fad2 EP |
547 | const char *device, |
548 | const char *name, | |
549 | int vdpa_device_fd, | |
550 | int queue_pair_index, | |
551 | int nvqs, | |
552 | bool is_datapath, | |
553 | bool svq, | |
554 | struct vhost_vdpa_iova_range iova_range, | |
555 | VhostIOVATree *iova_tree) | |
1e0a84ea CL |
556 | { |
557 | NetClientState *nc = NULL; | |
558 | VhostVDPAState *s; | |
1e0a84ea CL |
559 | int ret = 0; |
560 | assert(name); | |
40237840 JW |
561 | if (is_datapath) { |
562 | nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, | |
563 | name); | |
564 | } else { | |
f8972b56 | 565 | nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, |
40237840 JW |
566 | device, name); |
567 | } | |
53b85d95 | 568 | qemu_set_info_str(nc, TYPE_VHOST_VDPA); |
1e0a84ea | 569 | s = DO_UPCAST(VhostVDPAState, nc, nc); |
7327813d | 570 | |
1e0a84ea | 571 | s->vhost_vdpa.device_fd = vdpa_device_fd; |
40237840 | 572 | s->vhost_vdpa.index = queue_pair_index; |
7f211a28 | 573 | s->always_svq = svq; |
1576dbb5 | 574 | s->vhost_vdpa.shadow_vqs_enabled = svq; |
a585fad2 | 575 | s->vhost_vdpa.iova_range = iova_range; |
1576dbb5 | 576 | s->vhost_vdpa.iova_tree = iova_tree; |
bd907ae4 | 577 | if (!is_datapath) { |
2df4dd31 EP |
578 | s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(), |
579 | vhost_vdpa_net_cvq_cmd_page_len()); | |
580 | memset(s->cvq_cmd_out_buffer, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
17fb889f EP |
581 | s->status = qemu_memalign(qemu_real_host_page_size(), |
582 | vhost_vdpa_net_cvq_cmd_page_len()); | |
583 | memset(s->status, 0, vhost_vdpa_net_cvq_cmd_page_len()); | |
2df4dd31 | 584 | |
bd907ae4 EP |
585 | s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; |
586 | s->vhost_vdpa.shadow_vq_ops_opaque = s; | |
587 | } | |
40237840 | 588 | ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); |
74af5eec | 589 | if (ret) { |
74af5eec | 590 | qemu_del_net_client(nc); |
654790b6 | 591 | return NULL; |
74af5eec | 592 | } |
654790b6 | 593 | return nc; |
1e0a84ea CL |
594 | } |
595 | ||
1576dbb5 EP |
596 | static int vhost_vdpa_get_iova_range(int fd, |
597 | struct vhost_vdpa_iova_range *iova_range) | |
598 | { | |
599 | int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range); | |
600 | ||
601 | return ret < 0 ? -errno : 0; | |
602 | } | |
603 | ||
8170ab3f EP |
604 | static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) |
605 | { | |
606 | int ret = ioctl(fd, VHOST_GET_FEATURES, features); | |
607 | if (unlikely(ret < 0)) { | |
608 | error_setg_errno(errp, errno, | |
609 | "Fail to query features from vhost-vDPA device"); | |
610 | } | |
611 | return ret; | |
612 | } | |
613 | ||
614 | static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, | |
615 | int *has_cvq, Error **errp) | |
40237840 JW |
616 | { |
617 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); | |
cd523a41 | 618 | g_autofree struct vhost_vdpa_config *config = NULL; |
40237840 | 619 | __virtio16 *max_queue_pairs; |
40237840 JW |
620 | int ret; |
621 | ||
40237840 JW |
622 | if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { |
623 | *has_cvq = 1; | |
624 | } else { | |
625 | *has_cvq = 0; | |
626 | } | |
627 | ||
628 | if (features & (1 << VIRTIO_NET_F_MQ)) { | |
629 | config = g_malloc0(config_size + sizeof(*max_queue_pairs)); | |
630 | config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); | |
631 | config->len = sizeof(*max_queue_pairs); | |
632 | ||
633 | ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); | |
634 | if (ret) { | |
635 | error_setg(errp, "Fail to get config from vhost-vDPA device"); | |
636 | return -ret; | |
637 | } | |
638 | ||
639 | max_queue_pairs = (__virtio16 *)&config->buf; | |
640 | ||
641 | return lduw_le_p(max_queue_pairs); | |
642 | } | |
643 | ||
644 | return 1; | |
645 | } | |
646 | ||
1e0a84ea CL |
647 | int net_init_vhost_vdpa(const Netdev *netdev, const char *name, |
648 | NetClientState *peer, Error **errp) | |
649 | { | |
650 | const NetdevVhostVDPAOptions *opts; | |
8170ab3f | 651 | uint64_t features; |
654790b6 | 652 | int vdpa_device_fd; |
eb3cb751 | 653 | g_autofree NetClientState **ncs = NULL; |
1576dbb5 | 654 | g_autoptr(VhostIOVATree) iova_tree = NULL; |
a585fad2 | 655 | struct vhost_vdpa_iova_range iova_range; |
eb3cb751 | 656 | NetClientState *nc; |
aed5da45 | 657 | int queue_pairs, r, i = 0, has_cvq = 0; |
1e0a84ea CL |
658 | |
659 | assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); | |
660 | opts = &netdev->u.vhost_vdpa; | |
7480874a | 661 | if (!opts->vhostdev && !opts->vhostfd) { |
8801ccd0 SWL |
662 | error_setg(errp, |
663 | "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); | |
c8295404 EP |
664 | return -1; |
665 | } | |
7327813d | 666 | |
7480874a | 667 | if (opts->vhostdev && opts->vhostfd) { |
8801ccd0 SWL |
668 | error_setg(errp, |
669 | "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); | |
670 | return -1; | |
671 | } | |
672 | ||
7480874a | 673 | if (opts->vhostdev) { |
8801ccd0 SWL |
674 | vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); |
675 | if (vdpa_device_fd == -1) { | |
676 | return -errno; | |
677 | } | |
5107fd3e PM |
678 | } else { |
679 | /* has_vhostfd */ | |
8801ccd0 SWL |
680 | vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); |
681 | if (vdpa_device_fd == -1) { | |
682 | error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); | |
683 | return -1; | |
684 | } | |
7327813d JW |
685 | } |
686 | ||
8170ab3f EP |
687 | r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); |
688 | if (unlikely(r < 0)) { | |
aed5da45 | 689 | goto err; |
8170ab3f EP |
690 | } |
691 | ||
692 | queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, | |
40237840 JW |
693 | &has_cvq, errp); |
694 | if (queue_pairs < 0) { | |
7327813d | 695 | qemu_close(vdpa_device_fd); |
40237840 JW |
696 | return queue_pairs; |
697 | } | |
698 | ||
a585fad2 | 699 | vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); |
1576dbb5 | 700 | if (opts->x_svq) { |
36e46472 | 701 | if (!vhost_vdpa_net_valid_svq_features(features, errp)) { |
1576dbb5 EP |
702 | goto err_svq; |
703 | } | |
704 | ||
1576dbb5 EP |
705 | iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last); |
706 | } | |
707 | ||
40237840 JW |
708 | ncs = g_malloc0(sizeof(*ncs) * queue_pairs); |
709 | ||
710 | for (i = 0; i < queue_pairs; i++) { | |
711 | ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 712 | vdpa_device_fd, i, 2, true, opts->x_svq, |
a585fad2 | 713 | iova_range, iova_tree); |
40237840 JW |
714 | if (!ncs[i]) |
715 | goto err; | |
7327813d JW |
716 | } |
717 | ||
40237840 JW |
718 | if (has_cvq) { |
719 | nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, | |
1576dbb5 | 720 | vdpa_device_fd, i, 1, false, |
a585fad2 | 721 | opts->x_svq, iova_range, iova_tree); |
40237840 JW |
722 | if (!nc) |
723 | goto err; | |
724 | } | |
725 | ||
1576dbb5 EP |
726 | /* iova_tree ownership belongs to last NetClientState */ |
727 | g_steal_pointer(&iova_tree); | |
654790b6 | 728 | return 0; |
40237840 JW |
729 | |
730 | err: | |
731 | if (i) { | |
9bd05507 SWL |
732 | for (i--; i >= 0; i--) { |
733 | qemu_del_net_client(ncs[i]); | |
734 | } | |
40237840 | 735 | } |
1576dbb5 EP |
736 | |
737 | err_svq: | |
40237840 | 738 | qemu_close(vdpa_device_fd); |
40237840 JW |
739 | |
740 | return -1; | |
1e0a84ea | 741 | } |