xref: /openbmc/qemu/hw/display/virtio-gpu-virgl.c (revision d2dfe0b5)
1 /*
2  * Virtio GPU Device
3  *
4  * Copyright Red Hat, Inc. 2013-2014
5  *
6  * Authors:
7  *     Dave Airlie <airlied@redhat.com>
8  *     Gerd Hoffmann <kraxel@redhat.com>
9  *
10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
11  * See the COPYING file in the top-level directory.
12  */
13 
14 #include "qemu/osdep.h"
15 #include "qemu/error-report.h"
16 #include "qemu/iov.h"
17 #include "trace.h"
18 #include "hw/virtio/virtio.h"
19 #include "hw/virtio/virtio-gpu.h"
20 
21 #include <virglrenderer.h>
22 
23 static struct virgl_renderer_callbacks virtio_gpu_3d_cbs;
24 
25 static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
26                                          struct virtio_gpu_ctrl_command *cmd)
27 {
28     struct virtio_gpu_resource_create_2d c2d;
29     struct virgl_renderer_resource_create_args args;
30 
31     VIRTIO_GPU_FILL_CMD(c2d);
32     trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
33                                        c2d.width, c2d.height);
34 
35     args.handle = c2d.resource_id;
36     args.target = 2;
37     args.format = c2d.format;
38     args.bind = (1 << 1);
39     args.width = c2d.width;
40     args.height = c2d.height;
41     args.depth = 1;
42     args.array_size = 1;
43     args.last_level = 0;
44     args.nr_samples = 0;
45     args.flags = VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP;
46     virgl_renderer_resource_create(&args, NULL, 0);
47 }
48 
49 static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
50                                          struct virtio_gpu_ctrl_command *cmd)
51 {
52     struct virtio_gpu_resource_create_3d c3d;
53     struct virgl_renderer_resource_create_args args;
54 
55     VIRTIO_GPU_FILL_CMD(c3d);
56     trace_virtio_gpu_cmd_res_create_3d(c3d.resource_id, c3d.format,
57                                        c3d.width, c3d.height, c3d.depth);
58 
59     args.handle = c3d.resource_id;
60     args.target = c3d.target;
61     args.format = c3d.format;
62     args.bind = c3d.bind;
63     args.width = c3d.width;
64     args.height = c3d.height;
65     args.depth = c3d.depth;
66     args.array_size = c3d.array_size;
67     args.last_level = c3d.last_level;
68     args.nr_samples = c3d.nr_samples;
69     args.flags = c3d.flags;
70     virgl_renderer_resource_create(&args, NULL, 0);
71 }
72 
73 static void virgl_cmd_resource_unref(VirtIOGPU *g,
74                                      struct virtio_gpu_ctrl_command *cmd)
75 {
76     struct virtio_gpu_resource_unref unref;
77     struct iovec *res_iovs = NULL;
78     int num_iovs = 0;
79 
80     VIRTIO_GPU_FILL_CMD(unref);
81     trace_virtio_gpu_cmd_res_unref(unref.resource_id);
82 
83     virgl_renderer_resource_detach_iov(unref.resource_id,
84                                        &res_iovs,
85                                        &num_iovs);
86     if (res_iovs != NULL && num_iovs != 0) {
87         virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
88     }
89     virgl_renderer_resource_unref(unref.resource_id);
90 }
91 
92 static void virgl_cmd_context_create(VirtIOGPU *g,
93                                      struct virtio_gpu_ctrl_command *cmd)
94 {
95     struct virtio_gpu_ctx_create cc;
96 
97     VIRTIO_GPU_FILL_CMD(cc);
98     trace_virtio_gpu_cmd_ctx_create(cc.hdr.ctx_id,
99                                     cc.debug_name);
100 
101     virgl_renderer_context_create(cc.hdr.ctx_id, cc.nlen,
102                                   cc.debug_name);
103 }
104 
105 static void virgl_cmd_context_destroy(VirtIOGPU *g,
106                                       struct virtio_gpu_ctrl_command *cmd)
107 {
108     struct virtio_gpu_ctx_destroy cd;
109 
110     VIRTIO_GPU_FILL_CMD(cd);
111     trace_virtio_gpu_cmd_ctx_destroy(cd.hdr.ctx_id);
112 
113     virgl_renderer_context_destroy(cd.hdr.ctx_id);
114 }
115 
116 static void virtio_gpu_rect_update(VirtIOGPU *g, int idx, int x, int y,
117                                 int width, int height)
118 {
119     if (!g->parent_obj.scanout[idx].con) {
120         return;
121     }
122 
123     dpy_gl_update(g->parent_obj.scanout[idx].con, x, y, width, height);
124 }
125 
126 static void virgl_cmd_resource_flush(VirtIOGPU *g,
127                                      struct virtio_gpu_ctrl_command *cmd)
128 {
129     struct virtio_gpu_resource_flush rf;
130     int i;
131 
132     VIRTIO_GPU_FILL_CMD(rf);
133     trace_virtio_gpu_cmd_res_flush(rf.resource_id,
134                                    rf.r.width, rf.r.height, rf.r.x, rf.r.y);
135 
136     for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
137         if (g->parent_obj.scanout[i].resource_id != rf.resource_id) {
138             continue;
139         }
140         virtio_gpu_rect_update(g, i, rf.r.x, rf.r.y, rf.r.width, rf.r.height);
141     }
142 }
143 
144 static void virgl_cmd_set_scanout(VirtIOGPU *g,
145                                   struct virtio_gpu_ctrl_command *cmd)
146 {
147     struct virtio_gpu_set_scanout ss;
148     struct virgl_renderer_resource_info info;
149     int ret;
150 
151     VIRTIO_GPU_FILL_CMD(ss);
152     trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
153                                      ss.r.width, ss.r.height, ss.r.x, ss.r.y);
154 
155     if (ss.scanout_id >= g->parent_obj.conf.max_outputs) {
156         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
157                       __func__, ss.scanout_id);
158         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
159         return;
160     }
161     g->parent_obj.enable = 1;
162 
163     memset(&info, 0, sizeof(info));
164 
165     if (ss.resource_id && ss.r.width && ss.r.height) {
166         ret = virgl_renderer_resource_get_info(ss.resource_id, &info);
167         if (ret == -1) {
168             qemu_log_mask(LOG_GUEST_ERROR,
169                           "%s: illegal resource specified %d\n",
170                           __func__, ss.resource_id);
171             cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
172             return;
173         }
174         qemu_console_resize(g->parent_obj.scanout[ss.scanout_id].con,
175                             ss.r.width, ss.r.height);
176         virgl_renderer_force_ctx_0();
177         dpy_gl_scanout_texture(
178             g->parent_obj.scanout[ss.scanout_id].con, info.tex_id,
179             info.flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
180             info.width, info.height,
181             ss.r.x, ss.r.y, ss.r.width, ss.r.height);
182     } else {
183         dpy_gfx_replace_surface(
184             g->parent_obj.scanout[ss.scanout_id].con, NULL);
185         dpy_gl_scanout_disable(g->parent_obj.scanout[ss.scanout_id].con);
186     }
187     g->parent_obj.scanout[ss.scanout_id].resource_id = ss.resource_id;
188 }
189 
190 static void virgl_cmd_submit_3d(VirtIOGPU *g,
191                                 struct virtio_gpu_ctrl_command *cmd)
192 {
193     struct virtio_gpu_cmd_submit cs;
194     void *buf;
195     size_t s;
196 
197     VIRTIO_GPU_FILL_CMD(cs);
198     trace_virtio_gpu_cmd_ctx_submit(cs.hdr.ctx_id, cs.size);
199 
200     buf = g_malloc(cs.size);
201     s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
202                    sizeof(cs), buf, cs.size);
203     if (s != cs.size) {
204         qemu_log_mask(LOG_GUEST_ERROR, "%s: size mismatch (%zd/%d)",
205                       __func__, s, cs.size);
206         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
207         goto out;
208     }
209 
210     if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
211         g->stats.req_3d++;
212         g->stats.bytes_3d += cs.size;
213     }
214 
215     virgl_renderer_submit_cmd(buf, cs.hdr.ctx_id, cs.size / 4);
216 
217 out:
218     g_free(buf);
219 }
220 
221 static void virgl_cmd_transfer_to_host_2d(VirtIOGPU *g,
222                                           struct virtio_gpu_ctrl_command *cmd)
223 {
224     struct virtio_gpu_transfer_to_host_2d t2d;
225     struct virtio_gpu_box box;
226 
227     VIRTIO_GPU_FILL_CMD(t2d);
228     trace_virtio_gpu_cmd_res_xfer_toh_2d(t2d.resource_id);
229 
230     box.x = t2d.r.x;
231     box.y = t2d.r.y;
232     box.z = 0;
233     box.w = t2d.r.width;
234     box.h = t2d.r.height;
235     box.d = 1;
236 
237     virgl_renderer_transfer_write_iov(t2d.resource_id,
238                                       0,
239                                       0,
240                                       0,
241                                       0,
242                                       (struct virgl_box *)&box,
243                                       t2d.offset, NULL, 0);
244 }
245 
246 static void virgl_cmd_transfer_to_host_3d(VirtIOGPU *g,
247                                           struct virtio_gpu_ctrl_command *cmd)
248 {
249     struct virtio_gpu_transfer_host_3d t3d;
250 
251     VIRTIO_GPU_FILL_CMD(t3d);
252     trace_virtio_gpu_cmd_res_xfer_toh_3d(t3d.resource_id);
253 
254     virgl_renderer_transfer_write_iov(t3d.resource_id,
255                                       t3d.hdr.ctx_id,
256                                       t3d.level,
257                                       t3d.stride,
258                                       t3d.layer_stride,
259                                       (struct virgl_box *)&t3d.box,
260                                       t3d.offset, NULL, 0);
261 }
262 
263 static void
264 virgl_cmd_transfer_from_host_3d(VirtIOGPU *g,
265                                 struct virtio_gpu_ctrl_command *cmd)
266 {
267     struct virtio_gpu_transfer_host_3d tf3d;
268 
269     VIRTIO_GPU_FILL_CMD(tf3d);
270     trace_virtio_gpu_cmd_res_xfer_fromh_3d(tf3d.resource_id);
271 
272     virgl_renderer_transfer_read_iov(tf3d.resource_id,
273                                      tf3d.hdr.ctx_id,
274                                      tf3d.level,
275                                      tf3d.stride,
276                                      tf3d.layer_stride,
277                                      (struct virgl_box *)&tf3d.box,
278                                      tf3d.offset, NULL, 0);
279 }
280 
281 
282 static void virgl_resource_attach_backing(VirtIOGPU *g,
283                                           struct virtio_gpu_ctrl_command *cmd)
284 {
285     struct virtio_gpu_resource_attach_backing att_rb;
286     struct iovec *res_iovs;
287     uint32_t res_niov;
288     int ret;
289 
290     VIRTIO_GPU_FILL_CMD(att_rb);
291     trace_virtio_gpu_cmd_res_back_attach(att_rb.resource_id);
292 
293     ret = virtio_gpu_create_mapping_iov(g, att_rb.nr_entries, sizeof(att_rb),
294                                         cmd, NULL, &res_iovs, &res_niov);
295     if (ret != 0) {
296         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
297         return;
298     }
299 
300     ret = virgl_renderer_resource_attach_iov(att_rb.resource_id,
301                                              res_iovs, res_niov);
302 
303     if (ret != 0)
304         virtio_gpu_cleanup_mapping_iov(g, res_iovs, res_niov);
305 }
306 
307 static void virgl_resource_detach_backing(VirtIOGPU *g,
308                                           struct virtio_gpu_ctrl_command *cmd)
309 {
310     struct virtio_gpu_resource_detach_backing detach_rb;
311     struct iovec *res_iovs = NULL;
312     int num_iovs = 0;
313 
314     VIRTIO_GPU_FILL_CMD(detach_rb);
315     trace_virtio_gpu_cmd_res_back_detach(detach_rb.resource_id);
316 
317     virgl_renderer_resource_detach_iov(detach_rb.resource_id,
318                                        &res_iovs,
319                                        &num_iovs);
320     if (res_iovs == NULL || num_iovs == 0) {
321         return;
322     }
323     virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
324 }
325 
326 
327 static void virgl_cmd_ctx_attach_resource(VirtIOGPU *g,
328                                           struct virtio_gpu_ctrl_command *cmd)
329 {
330     struct virtio_gpu_ctx_resource att_res;
331 
332     VIRTIO_GPU_FILL_CMD(att_res);
333     trace_virtio_gpu_cmd_ctx_res_attach(att_res.hdr.ctx_id,
334                                         att_res.resource_id);
335 
336     virgl_renderer_ctx_attach_resource(att_res.hdr.ctx_id, att_res.resource_id);
337 }
338 
339 static void virgl_cmd_ctx_detach_resource(VirtIOGPU *g,
340                                           struct virtio_gpu_ctrl_command *cmd)
341 {
342     struct virtio_gpu_ctx_resource det_res;
343 
344     VIRTIO_GPU_FILL_CMD(det_res);
345     trace_virtio_gpu_cmd_ctx_res_detach(det_res.hdr.ctx_id,
346                                         det_res.resource_id);
347 
348     virgl_renderer_ctx_detach_resource(det_res.hdr.ctx_id, det_res.resource_id);
349 }
350 
351 static void virgl_cmd_get_capset_info(VirtIOGPU *g,
352                                       struct virtio_gpu_ctrl_command *cmd)
353 {
354     struct virtio_gpu_get_capset_info info;
355     struct virtio_gpu_resp_capset_info resp;
356 
357     VIRTIO_GPU_FILL_CMD(info);
358 
359     memset(&resp, 0, sizeof(resp));
360     if (info.capset_index == 0) {
361         resp.capset_id = VIRTIO_GPU_CAPSET_VIRGL;
362         virgl_renderer_get_cap_set(resp.capset_id,
363                                    &resp.capset_max_version,
364                                    &resp.capset_max_size);
365     } else if (info.capset_index == 1) {
366         resp.capset_id = VIRTIO_GPU_CAPSET_VIRGL2;
367         virgl_renderer_get_cap_set(resp.capset_id,
368                                    &resp.capset_max_version,
369                                    &resp.capset_max_size);
370     } else {
371         resp.capset_max_version = 0;
372         resp.capset_max_size = 0;
373     }
374     resp.hdr.type = VIRTIO_GPU_RESP_OK_CAPSET_INFO;
375     virtio_gpu_ctrl_response(g, cmd, &resp.hdr, sizeof(resp));
376 }
377 
378 static void virgl_cmd_get_capset(VirtIOGPU *g,
379                                  struct virtio_gpu_ctrl_command *cmd)
380 {
381     struct virtio_gpu_get_capset gc;
382     struct virtio_gpu_resp_capset *resp;
383     uint32_t max_ver, max_size;
384     VIRTIO_GPU_FILL_CMD(gc);
385 
386     virgl_renderer_get_cap_set(gc.capset_id, &max_ver,
387                                &max_size);
388     if (!max_size) {
389         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
390         return;
391     }
392 
393     resp = g_malloc0(sizeof(*resp) + max_size);
394     resp->hdr.type = VIRTIO_GPU_RESP_OK_CAPSET;
395     virgl_renderer_fill_caps(gc.capset_id,
396                              gc.capset_version,
397                              (void *)resp->capset_data);
398     virtio_gpu_ctrl_response(g, cmd, &resp->hdr, sizeof(*resp) + max_size);
399     g_free(resp);
400 }
401 
402 void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
403                                       struct virtio_gpu_ctrl_command *cmd)
404 {
405     VIRTIO_GPU_FILL_CMD(cmd->cmd_hdr);
406 
407     virgl_renderer_force_ctx_0();
408     switch (cmd->cmd_hdr.type) {
409     case VIRTIO_GPU_CMD_CTX_CREATE:
410         virgl_cmd_context_create(g, cmd);
411         break;
412     case VIRTIO_GPU_CMD_CTX_DESTROY:
413         virgl_cmd_context_destroy(g, cmd);
414         break;
415     case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
416         virgl_cmd_create_resource_2d(g, cmd);
417         break;
418     case VIRTIO_GPU_CMD_RESOURCE_CREATE_3D:
419         virgl_cmd_create_resource_3d(g, cmd);
420         break;
421     case VIRTIO_GPU_CMD_SUBMIT_3D:
422         virgl_cmd_submit_3d(g, cmd);
423         break;
424     case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
425         virgl_cmd_transfer_to_host_2d(g, cmd);
426         break;
427     case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D:
428         virgl_cmd_transfer_to_host_3d(g, cmd);
429         break;
430     case VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D:
431         virgl_cmd_transfer_from_host_3d(g, cmd);
432         break;
433     case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
434         virgl_resource_attach_backing(g, cmd);
435         break;
436     case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
437         virgl_resource_detach_backing(g, cmd);
438         break;
439     case VIRTIO_GPU_CMD_SET_SCANOUT:
440         virgl_cmd_set_scanout(g, cmd);
441         break;
442     case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
443         virgl_cmd_resource_flush(g, cmd);
444         break;
445     case VIRTIO_GPU_CMD_RESOURCE_UNREF:
446         virgl_cmd_resource_unref(g, cmd);
447         break;
448     case VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE:
449         /* TODO add security */
450         virgl_cmd_ctx_attach_resource(g, cmd);
451         break;
452     case VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE:
453         /* TODO add security */
454         virgl_cmd_ctx_detach_resource(g, cmd);
455         break;
456     case VIRTIO_GPU_CMD_GET_CAPSET_INFO:
457         virgl_cmd_get_capset_info(g, cmd);
458         break;
459     case VIRTIO_GPU_CMD_GET_CAPSET:
460         virgl_cmd_get_capset(g, cmd);
461         break;
462     case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
463         virtio_gpu_get_display_info(g, cmd);
464         break;
465     case VIRTIO_GPU_CMD_GET_EDID:
466         virtio_gpu_get_edid(g, cmd);
467         break;
468     default:
469         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
470         break;
471     }
472 
473     if (cmd->finished) {
474         return;
475     }
476     if (cmd->error) {
477         fprintf(stderr, "%s: ctrl 0x%x, error 0x%x\n", __func__,
478                 cmd->cmd_hdr.type, cmd->error);
479         virtio_gpu_ctrl_response_nodata(g, cmd, cmd->error);
480         return;
481     }
482     if (!(cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE)) {
483         virtio_gpu_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA);
484         return;
485     }
486 
487     trace_virtio_gpu_fence_ctrl(cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type);
488     virgl_renderer_create_fence(cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type);
489 }
490 
491 static void virgl_write_fence(void *opaque, uint32_t fence)
492 {
493     VirtIOGPU *g = opaque;
494     struct virtio_gpu_ctrl_command *cmd, *tmp;
495 
496     QTAILQ_FOREACH_SAFE(cmd, &g->fenceq, next, tmp) {
497         /*
498          * the guest can end up emitting fences out of order
499          * so we should check all fenced cmds not just the first one.
500          */
501         if (cmd->cmd_hdr.fence_id > fence) {
502             continue;
503         }
504         trace_virtio_gpu_fence_resp(cmd->cmd_hdr.fence_id);
505         virtio_gpu_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA);
506         QTAILQ_REMOVE(&g->fenceq, cmd, next);
507         g_free(cmd);
508         g->inflight--;
509         if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
510             fprintf(stderr, "inflight: %3d (-)\r", g->inflight);
511         }
512     }
513 }
514 
515 static virgl_renderer_gl_context
516 virgl_create_context(void *opaque, int scanout_idx,
517                      struct virgl_renderer_gl_ctx_param *params)
518 {
519     VirtIOGPU *g = opaque;
520     QEMUGLContext ctx;
521     QEMUGLParams qparams;
522 
523     qparams.major_ver = params->major_ver;
524     qparams.minor_ver = params->minor_ver;
525 
526     ctx = dpy_gl_ctx_create(g->parent_obj.scanout[scanout_idx].con, &qparams);
527     return (virgl_renderer_gl_context)ctx;
528 }
529 
530 static void virgl_destroy_context(void *opaque, virgl_renderer_gl_context ctx)
531 {
532     VirtIOGPU *g = opaque;
533     QEMUGLContext qctx = (QEMUGLContext)ctx;
534 
535     dpy_gl_ctx_destroy(g->parent_obj.scanout[0].con, qctx);
536 }
537 
538 static int virgl_make_context_current(void *opaque, int scanout_idx,
539                                       virgl_renderer_gl_context ctx)
540 {
541     VirtIOGPU *g = opaque;
542     QEMUGLContext qctx = (QEMUGLContext)ctx;
543 
544     return dpy_gl_ctx_make_current(g->parent_obj.scanout[scanout_idx].con,
545                                    qctx);
546 }
547 
548 static struct virgl_renderer_callbacks virtio_gpu_3d_cbs = {
549     .version             = 1,
550     .write_fence         = virgl_write_fence,
551     .create_gl_context   = virgl_create_context,
552     .destroy_gl_context  = virgl_destroy_context,
553     .make_current        = virgl_make_context_current,
554 };
555 
556 static void virtio_gpu_print_stats(void *opaque)
557 {
558     VirtIOGPU *g = opaque;
559 
560     if (g->stats.requests) {
561         fprintf(stderr, "stats: vq req %4d, %3d -- 3D %4d (%5d)\n",
562                 g->stats.requests,
563                 g->stats.max_inflight,
564                 g->stats.req_3d,
565                 g->stats.bytes_3d);
566         g->stats.requests     = 0;
567         g->stats.max_inflight = 0;
568         g->stats.req_3d       = 0;
569         g->stats.bytes_3d     = 0;
570     } else {
571         fprintf(stderr, "stats: idle\r");
572     }
573     timer_mod(g->print_stats, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 1000);
574 }
575 
576 static void virtio_gpu_fence_poll(void *opaque)
577 {
578     VirtIOGPU *g = opaque;
579 
580     virgl_renderer_poll();
581     virtio_gpu_process_cmdq(g);
582     if (!QTAILQ_EMPTY(&g->cmdq) || !QTAILQ_EMPTY(&g->fenceq)) {
583         timer_mod(g->fence_poll, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 10);
584     }
585 }
586 
587 void virtio_gpu_virgl_fence_poll(VirtIOGPU *g)
588 {
589     virtio_gpu_fence_poll(g);
590 }
591 
592 void virtio_gpu_virgl_reset_scanout(VirtIOGPU *g)
593 {
594     int i;
595 
596     for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
597         dpy_gfx_replace_surface(g->parent_obj.scanout[i].con, NULL);
598         dpy_gl_scanout_disable(g->parent_obj.scanout[i].con);
599     }
600 }
601 
602 void virtio_gpu_virgl_reset(VirtIOGPU *g)
603 {
604     virgl_renderer_reset();
605 }
606 
607 int virtio_gpu_virgl_init(VirtIOGPU *g)
608 {
609     int ret;
610 
611     ret = virgl_renderer_init(g, 0, &virtio_gpu_3d_cbs);
612     if (ret != 0) {
613         error_report("virgl could not be initialized: %d", ret);
614         return ret;
615     }
616 
617     g->fence_poll = timer_new_ms(QEMU_CLOCK_VIRTUAL,
618                                  virtio_gpu_fence_poll, g);
619 
620     if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
621         g->print_stats = timer_new_ms(QEMU_CLOCK_VIRTUAL,
622                                       virtio_gpu_print_stats, g);
623         timer_mod(g->print_stats, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 1000);
624     }
625     return 0;
626 }
627 
628 int virtio_gpu_virgl_get_num_capsets(VirtIOGPU *g)
629 {
630     uint32_t capset2_max_ver, capset2_max_size;
631     virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VIRGL2,
632                               &capset2_max_ver,
633                               &capset2_max_size);
634 
635     return capset2_max_ver ? 2 : 1;
636 }
637