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13#include "qemu/osdep.h"
14#include "hw/qdev-properties.h"
15#include "hw/virtio/virtio-gpu.h"
16#include "chardev/char-fe.h"
17#include "qapi/error.h"
18#include "migration/blocker.h"
19
20typedef enum VhostUserGpuRequest {
21 VHOST_USER_GPU_NONE = 0,
22 VHOST_USER_GPU_GET_PROTOCOL_FEATURES,
23 VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
24 VHOST_USER_GPU_GET_DISPLAY_INFO,
25 VHOST_USER_GPU_CURSOR_POS,
26 VHOST_USER_GPU_CURSOR_POS_HIDE,
27 VHOST_USER_GPU_CURSOR_UPDATE,
28 VHOST_USER_GPU_SCANOUT,
29 VHOST_USER_GPU_UPDATE,
30 VHOST_USER_GPU_DMABUF_SCANOUT,
31 VHOST_USER_GPU_DMABUF_UPDATE,
32} VhostUserGpuRequest;
33
34typedef struct VhostUserGpuDisplayInfoReply {
35 struct virtio_gpu_resp_display_info info;
36} VhostUserGpuDisplayInfoReply;
37
38typedef struct VhostUserGpuCursorPos {
39 uint32_t scanout_id;
40 uint32_t x;
41 uint32_t y;
42} QEMU_PACKED VhostUserGpuCursorPos;
43
44typedef struct VhostUserGpuCursorUpdate {
45 VhostUserGpuCursorPos pos;
46 uint32_t hot_x;
47 uint32_t hot_y;
48 uint32_t data[64 * 64];
49} QEMU_PACKED VhostUserGpuCursorUpdate;
50
51typedef struct VhostUserGpuScanout {
52 uint32_t scanout_id;
53 uint32_t width;
54 uint32_t height;
55} QEMU_PACKED VhostUserGpuScanout;
56
57typedef struct VhostUserGpuUpdate {
58 uint32_t scanout_id;
59 uint32_t x;
60 uint32_t y;
61 uint32_t width;
62 uint32_t height;
63 uint8_t data[];
64} QEMU_PACKED VhostUserGpuUpdate;
65
66typedef struct VhostUserGpuDMABUFScanout {
67 uint32_t scanout_id;
68 uint32_t x;
69 uint32_t y;
70 uint32_t width;
71 uint32_t height;
72 uint32_t fd_width;
73 uint32_t fd_height;
74 uint32_t fd_stride;
75 uint32_t fd_flags;
76 int fd_drm_fourcc;
77} QEMU_PACKED VhostUserGpuDMABUFScanout;
78
79typedef struct VhostUserGpuMsg {
80 uint32_t request;
81 uint32_t flags;
82 uint32_t size;
83 union {
84 VhostUserGpuCursorPos cursor_pos;
85 VhostUserGpuCursorUpdate cursor_update;
86 VhostUserGpuScanout scanout;
87 VhostUserGpuUpdate update;
88 VhostUserGpuDMABUFScanout dmabuf_scanout;
89 struct virtio_gpu_resp_display_info display_info;
90 uint64_t u64;
91 } payload;
92} QEMU_PACKED VhostUserGpuMsg;
93
94static VhostUserGpuMsg m __attribute__ ((unused));
95#define VHOST_USER_GPU_HDR_SIZE \
96 (sizeof(m.request) + sizeof(m.size) + sizeof(m.flags))
97
98#define VHOST_USER_GPU_MSG_FLAG_REPLY 0x4
99
100static void vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked);
101
102static void
103vhost_user_gpu_handle_cursor(VhostUserGPU *g, VhostUserGpuMsg *msg)
104{
105 VhostUserGpuCursorPos *pos = &msg->payload.cursor_pos;
106 struct virtio_gpu_scanout *s;
107
108 if (pos->scanout_id >= g->parent_obj.conf.max_outputs) {
109 return;
110 }
111 s = &g->parent_obj.scanout[pos->scanout_id];
112
113 if (msg->request == VHOST_USER_GPU_CURSOR_UPDATE) {
114 VhostUserGpuCursorUpdate *up = &msg->payload.cursor_update;
115 if (!s->current_cursor) {
116 s->current_cursor = cursor_alloc(64, 64);
117 }
118
119 s->current_cursor->hot_x = up->hot_x;
120 s->current_cursor->hot_y = up->hot_y;
121
122 memcpy(s->current_cursor->data, up->data,
123 64 * 64 * sizeof(uint32_t));
124
125 dpy_cursor_define(s->con, s->current_cursor);
126 }
127
128 dpy_mouse_set(s->con, pos->x, pos->y,
129 msg->request != VHOST_USER_GPU_CURSOR_POS_HIDE);
130}
131
132static void
133vhost_user_gpu_send_msg(VhostUserGPU *g, const VhostUserGpuMsg *msg)
134{
135 qemu_chr_fe_write(&g->vhost_chr, (uint8_t *)msg,
136 VHOST_USER_GPU_HDR_SIZE + msg->size);
137}
138
139static void
140vhost_user_gpu_unblock(VhostUserGPU *g)
141{
142 VhostUserGpuMsg msg = {
143 .request = VHOST_USER_GPU_DMABUF_UPDATE,
144 .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
145 };
146
147 vhost_user_gpu_send_msg(g, &msg);
148}
149
150static void
151vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
152{
153 QemuConsole *con = NULL;
154 struct virtio_gpu_scanout *s;
155
156 switch (msg->request) {
157 case VHOST_USER_GPU_GET_PROTOCOL_FEATURES: {
158 VhostUserGpuMsg reply = {
159 .request = msg->request,
160 .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
161 .size = sizeof(uint64_t),
162 };
163
164 vhost_user_gpu_send_msg(g, &reply);
165 break;
166 }
167 case VHOST_USER_GPU_SET_PROTOCOL_FEATURES: {
168 break;
169 }
170 case VHOST_USER_GPU_GET_DISPLAY_INFO: {
171 struct virtio_gpu_resp_display_info display_info = { {} };
172 VhostUserGpuMsg reply = {
173 .request = msg->request,
174 .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
175 .size = sizeof(struct virtio_gpu_resp_display_info),
176 };
177
178 display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
179 virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
180 memcpy(&reply.payload.display_info, &display_info,
181 sizeof(display_info));
182 vhost_user_gpu_send_msg(g, &reply);
183 break;
184 }
185 case VHOST_USER_GPU_SCANOUT: {
186 VhostUserGpuScanout *m = &msg->payload.scanout;
187
188 if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
189 return;
190 }
191
192 g->parent_obj.enable = 1;
193 s = &g->parent_obj.scanout[m->scanout_id];
194 con = s->con;
195
196 if (m->width == 0) {
197 dpy_gfx_replace_surface(con, NULL);
198 } else {
199 s->ds = qemu_create_displaysurface(m->width, m->height);
200
201 }
202
203 break;
204 }
205 case VHOST_USER_GPU_DMABUF_SCANOUT: {
206 VhostUserGpuDMABUFScanout *m = &msg->payload.dmabuf_scanout;
207 int fd = qemu_chr_fe_get_msgfd(&g->vhost_chr);
208 QemuDmaBuf *dmabuf;
209
210 if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
211 error_report("invalid scanout: %d", m->scanout_id);
212 if (fd >= 0) {
213 close(fd);
214 }
215 break;
216 }
217
218 g->parent_obj.enable = 1;
219 con = g->parent_obj.scanout[m->scanout_id].con;
220 dmabuf = &g->dmabuf[m->scanout_id];
221 if (dmabuf->fd >= 0) {
222 close(dmabuf->fd);
223 dmabuf->fd = -1;
224 }
225 dpy_gl_release_dmabuf(con, dmabuf);
226 if (fd == -1) {
227 dpy_gl_scanout_disable(con);
228 break;
229 }
230 *dmabuf = (QemuDmaBuf) {
231 .fd = fd,
232 .width = m->fd_width,
233 .height = m->fd_height,
234 .stride = m->fd_stride,
235 .fourcc = m->fd_drm_fourcc,
236 .y0_top = m->fd_flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
237 };
238 dpy_gl_scanout_dmabuf(con, dmabuf);
239 break;
240 }
241 case VHOST_USER_GPU_DMABUF_UPDATE: {
242 VhostUserGpuUpdate *m = &msg->payload.update;
243
244 if (m->scanout_id >= g->parent_obj.conf.max_outputs ||
245 !g->parent_obj.scanout[m->scanout_id].con) {
246 error_report("invalid scanout update: %d", m->scanout_id);
247 vhost_user_gpu_unblock(g);
248 break;
249 }
250
251 con = g->parent_obj.scanout[m->scanout_id].con;
252 if (!console_has_gl(con)) {
253 error_report("console doesn't support GL!");
254 vhost_user_gpu_unblock(g);
255 break;
256 }
257 dpy_gl_update(con, m->x, m->y, m->width, m->height);
258 g->backend_blocked = true;
259 break;
260 }
261 case VHOST_USER_GPU_UPDATE: {
262 VhostUserGpuUpdate *m = &msg->payload.update;
263
264 if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
265 break;
266 }
267 s = &g->parent_obj.scanout[m->scanout_id];
268 con = s->con;
269 pixman_image_t *image =
270 pixman_image_create_bits(PIXMAN_x8r8g8b8,
271 m->width,
272 m->height,
273 (uint32_t *)m->data,
274 m->width * 4);
275
276 pixman_image_composite(PIXMAN_OP_SRC,
277 image, NULL, s->ds->image,
278 0, 0, 0, 0, m->x, m->y, m->width, m->height);
279
280 pixman_image_unref(image);
281 if (qemu_console_surface(con) != s->ds) {
282 dpy_gfx_replace_surface(con, s->ds);
283 } else {
284 dpy_gfx_update(con, m->x, m->y, m->width, m->height);
285 }
286 break;
287 }
288 default:
289 g_warning("unhandled message %d %d", msg->request, msg->size);
290 }
291
292 if (con && qemu_console_is_gl_blocked(con)) {
293 vhost_user_gpu_update_blocked(g, true);
294 }
295}
296
297static void
298vhost_user_gpu_chr_read(void *opaque)
299{
300 VhostUserGPU *g = opaque;
301 VhostUserGpuMsg *msg = NULL;
302 VhostUserGpuRequest request;
303 uint32_t size, flags;
304 int r;
305
306 r = qemu_chr_fe_read_all(&g->vhost_chr,
307 (uint8_t *)&request, sizeof(uint32_t));
308 if (r != sizeof(uint32_t)) {
309 error_report("failed to read msg header: %d, %d", r, errno);
310 goto end;
311 }
312
313 r = qemu_chr_fe_read_all(&g->vhost_chr,
314 (uint8_t *)&flags, sizeof(uint32_t));
315 if (r != sizeof(uint32_t)) {
316 error_report("failed to read msg flags");
317 goto end;
318 }
319
320 r = qemu_chr_fe_read_all(&g->vhost_chr,
321 (uint8_t *)&size, sizeof(uint32_t));
322 if (r != sizeof(uint32_t)) {
323 error_report("failed to read msg size");
324 goto end;
325 }
326
327 msg = g_malloc(VHOST_USER_GPU_HDR_SIZE + size);
328
329 r = qemu_chr_fe_read_all(&g->vhost_chr,
330 (uint8_t *)&msg->payload, size);
331 if (r != size) {
332 error_report("failed to read msg payload %d != %d", r, size);
333 goto end;
334 }
335
336 msg->request = request;
337 msg->flags = size;
338 msg->size = size;
339
340 if (request == VHOST_USER_GPU_CURSOR_UPDATE ||
341 request == VHOST_USER_GPU_CURSOR_POS ||
342 request == VHOST_USER_GPU_CURSOR_POS_HIDE) {
343 vhost_user_gpu_handle_cursor(g, msg);
344 } else {
345 vhost_user_gpu_handle_display(g, msg);
346 }
347
348end:
349 g_free(msg);
350}
351
352static void
353vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked)
354{
355 qemu_set_fd_handler(g->vhost_gpu_fd,
356 blocked ? NULL : vhost_user_gpu_chr_read, NULL, g);
357}
358
359static void
360vhost_user_gpu_gl_flushed(VirtIOGPUBase *b)
361{
362 VhostUserGPU *g = VHOST_USER_GPU(b);
363
364 if (g->backend_blocked) {
365 vhost_user_gpu_unblock(VHOST_USER_GPU(g));
366 g->backend_blocked = false;
367 }
368
369 vhost_user_gpu_update_blocked(VHOST_USER_GPU(g), false);
370}
371
372static bool
373vhost_user_gpu_do_set_socket(VhostUserGPU *g, Error **errp)
374{
375 Chardev *chr;
376 int sv[2];
377
378 if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
379 error_setg_errno(errp, errno, "socketpair() failed");
380 return false;
381 }
382
383 chr = CHARDEV(object_new(TYPE_CHARDEV_SOCKET));
384 if (!chr || qemu_chr_add_client(chr, sv[0]) == -1) {
385 error_setg(errp, "Failed to make socket chardev");
386 goto err;
387 }
388 if (!qemu_chr_fe_init(&g->vhost_chr, chr, errp)) {
389 goto err;
390 }
391 if (vhost_user_gpu_set_socket(&g->vhost->dev, sv[1]) < 0) {
392 error_setg(errp, "Failed to set vhost-user-gpu socket");
393 qemu_chr_fe_deinit(&g->vhost_chr, false);
394 goto err;
395 }
396
397 g->vhost_gpu_fd = sv[0];
398 vhost_user_gpu_update_blocked(g, false);
399 close(sv[1]);
400 return true;
401
402err:
403 close(sv[0]);
404 close(sv[1]);
405 if (chr) {
406 object_unref(OBJECT(chr));
407 }
408 return false;
409}
410
411static void
412vhost_user_gpu_get_config(VirtIODevice *vdev, uint8_t *config_data)
413{
414 VhostUserGPU *g = VHOST_USER_GPU(vdev);
415 VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
416 struct virtio_gpu_config *vgconfig =
417 (struct virtio_gpu_config *)config_data;
418 Error *local_err = NULL;
419 int ret;
420
421 memset(config_data, 0, sizeof(struct virtio_gpu_config));
422
423 ret = vhost_dev_get_config(&g->vhost->dev,
424 config_data, sizeof(struct virtio_gpu_config),
425 &local_err);
426 if (ret) {
427 error_report_err(local_err);
428 return;
429 }
430
431
432 vgconfig->num_scanouts = b->virtio_config.num_scanouts;
433 vgconfig->events_read = b->virtio_config.events_read;
434 vgconfig->events_clear = b->virtio_config.events_clear;
435}
436
437static void
438vhost_user_gpu_set_config(VirtIODevice *vdev,
439 const uint8_t *config_data)
440{
441 VhostUserGPU *g = VHOST_USER_GPU(vdev);
442 VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
443 const struct virtio_gpu_config *vgconfig =
444 (const struct virtio_gpu_config *)config_data;
445 int ret;
446
447 if (vgconfig->events_clear) {
448 b->virtio_config.events_read &= ~vgconfig->events_clear;
449 }
450
451 ret = vhost_dev_set_config(&g->vhost->dev, config_data,
452 0, sizeof(struct virtio_gpu_config),
453 VHOST_SET_CONFIG_TYPE_MASTER);
454 if (ret) {
455 error_report("vhost-user-gpu: set device config space failed");
456 return;
457 }
458}
459
460static void
461vhost_user_gpu_set_status(VirtIODevice *vdev, uint8_t val)
462{
463 VhostUserGPU *g = VHOST_USER_GPU(vdev);
464 Error *err = NULL;
465
466 if (val & VIRTIO_CONFIG_S_DRIVER_OK && vdev->vm_running) {
467 if (!vhost_user_gpu_do_set_socket(g, &err)) {
468 error_report_err(err);
469 return;
470 }
471 vhost_user_backend_start(g->vhost);
472 } else {
473
474 if (g->vhost_gpu_fd != -1) {
475 vhost_user_gpu_update_blocked(g, true);
476 qemu_chr_fe_deinit(&g->vhost_chr, true);
477 g->vhost_gpu_fd = -1;
478 }
479 vhost_user_backend_stop(g->vhost);
480 }
481}
482
483static bool
484vhost_user_gpu_guest_notifier_pending(VirtIODevice *vdev, int idx)
485{
486 VhostUserGPU *g = VHOST_USER_GPU(vdev);
487
488 return vhost_virtqueue_pending(&g->vhost->dev, idx);
489}
490
491static void
492vhost_user_gpu_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
493{
494 VhostUserGPU *g = VHOST_USER_GPU(vdev);
495
496 vhost_virtqueue_mask(&g->vhost->dev, vdev, idx, mask);
497}
498
499static void
500vhost_user_gpu_instance_init(Object *obj)
501{
502 VhostUserGPU *g = VHOST_USER_GPU(obj);
503
504 g->vhost = VHOST_USER_BACKEND(object_new(TYPE_VHOST_USER_BACKEND));
505 object_property_add_alias(obj, "chardev",
506 OBJECT(g->vhost), "chardev");
507}
508
509static void
510vhost_user_gpu_instance_finalize(Object *obj)
511{
512 VhostUserGPU *g = VHOST_USER_GPU(obj);
513
514 object_unref(OBJECT(g->vhost));
515}
516
517static void
518vhost_user_gpu_reset(VirtIODevice *vdev)
519{
520 VhostUserGPU *g = VHOST_USER_GPU(vdev);
521
522 virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
523
524 vhost_user_backend_stop(g->vhost);
525}
526
527static int
528vhost_user_gpu_config_change(struct vhost_dev *dev)
529{
530 error_report("vhost-user-gpu: unhandled backend config change");
531 return -1;
532}
533
534static const VhostDevConfigOps config_ops = {
535 .vhost_dev_config_notifier = vhost_user_gpu_config_change,
536};
537
538static void
539vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
540{
541 VhostUserGPU *g = VHOST_USER_GPU(qdev);
542 VirtIODevice *vdev = VIRTIO_DEVICE(g);
543
544 vhost_dev_set_config_notifier(&g->vhost->dev, &config_ops);
545 if (vhost_user_backend_dev_init(g->vhost, vdev, 2, errp) < 0) {
546 return;
547 }
548
549
550 g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED;
551 if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
552 g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
553 }
554 if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_EDID)) {
555 g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_EDID_ENABLED;
556 } else {
557 error_report("EDID requested but the backend doesn't support it.");
558 g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_EDID_ENABLED);
559 }
560
561 if (!virtio_gpu_base_device_realize(qdev, NULL, NULL, errp)) {
562 return;
563 }
564
565 g->vhost_gpu_fd = -1;
566}
567
568static Property vhost_user_gpu_properties[] = {
569 VIRTIO_GPU_BASE_PROPERTIES(VhostUserGPU, parent_obj.conf),
570 DEFINE_PROP_END_OF_LIST(),
571};
572
573static void
574vhost_user_gpu_class_init(ObjectClass *klass, void *data)
575{
576 DeviceClass *dc = DEVICE_CLASS(klass);
577 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
578 VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
579
580 vgc->gl_flushed = vhost_user_gpu_gl_flushed;
581
582 vdc->realize = vhost_user_gpu_device_realize;
583 vdc->reset = vhost_user_gpu_reset;
584 vdc->set_status = vhost_user_gpu_set_status;
585 vdc->guest_notifier_mask = vhost_user_gpu_guest_notifier_mask;
586 vdc->guest_notifier_pending = vhost_user_gpu_guest_notifier_pending;
587 vdc->get_config = vhost_user_gpu_get_config;
588 vdc->set_config = vhost_user_gpu_set_config;
589
590 device_class_set_props(dc, vhost_user_gpu_properties);
591}
592
593static const TypeInfo vhost_user_gpu_info = {
594 .name = TYPE_VHOST_USER_GPU,
595 .parent = TYPE_VIRTIO_GPU_BASE,
596 .instance_size = sizeof(VhostUserGPU),
597 .instance_init = vhost_user_gpu_instance_init,
598 .instance_finalize = vhost_user_gpu_instance_finalize,
599 .class_init = vhost_user_gpu_class_init,
600};
601module_obj(TYPE_VHOST_USER_GPU);
602
603static void vhost_user_gpu_register_types(void)
604{
605 type_register_static(&vhost_user_gpu_info);
606}
607
608type_init(vhost_user_gpu_register_types)
609
