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14#include "qemu/osdep.h"
15#include "qemu/drm.h"
16#include "qapi/error.h"
17#include "qemu/sockets.h"
18
19#include <pixman.h>
20#include <glib-unix.h>
21
22#include "vugpu.h"
23#include "hw/virtio/virtio-gpu-bswap.h"
24#include "hw/virtio/virtio-gpu-pixman.h"
25#include "virgl.h"
26#include "vugbm.h"
27
28enum {
29 VHOST_USER_GPU_MAX_QUEUES = 2,
30};
31
32struct virtio_gpu_simple_resource {
33 uint32_t resource_id;
34 uint32_t width;
35 uint32_t height;
36 uint32_t format;
37 struct iovec *iov;
38 unsigned int iov_cnt;
39 uint32_t scanout_bitmask;
40 pixman_image_t *image;
41 struct vugbm_buffer buffer;
42 QTAILQ_ENTRY(virtio_gpu_simple_resource) next;
43};
44
45static gboolean opt_print_caps;
46static int opt_fdnum = -1;
47static char *opt_socket_path;
48static char *opt_render_node;
49static gboolean opt_virgl;
50
51static void vg_handle_ctrl(VuDev *dev, int qidx);
52
53static const char *
54vg_cmd_to_string(int cmd)
55{
56#define CMD(cmd) [cmd] = #cmd
57 static const char *vg_cmd_str[] = {
58 CMD(VIRTIO_GPU_UNDEFINED),
59
60
61 CMD(VIRTIO_GPU_CMD_GET_DISPLAY_INFO),
62 CMD(VIRTIO_GPU_CMD_RESOURCE_CREATE_2D),
63 CMD(VIRTIO_GPU_CMD_RESOURCE_UNREF),
64 CMD(VIRTIO_GPU_CMD_SET_SCANOUT),
65 CMD(VIRTIO_GPU_CMD_RESOURCE_FLUSH),
66 CMD(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D),
67 CMD(VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING),
68 CMD(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING),
69 CMD(VIRTIO_GPU_CMD_GET_CAPSET_INFO),
70 CMD(VIRTIO_GPU_CMD_GET_CAPSET),
71
72
73 CMD(VIRTIO_GPU_CMD_CTX_CREATE),
74 CMD(VIRTIO_GPU_CMD_CTX_DESTROY),
75 CMD(VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE),
76 CMD(VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE),
77 CMD(VIRTIO_GPU_CMD_RESOURCE_CREATE_3D),
78 CMD(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D),
79 CMD(VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D),
80 CMD(VIRTIO_GPU_CMD_SUBMIT_3D),
81
82
83 CMD(VIRTIO_GPU_CMD_UPDATE_CURSOR),
84 CMD(VIRTIO_GPU_CMD_MOVE_CURSOR),
85 };
86#undef REQ
87
88 if (cmd >= 0 && cmd < G_N_ELEMENTS(vg_cmd_str)) {
89 return vg_cmd_str[cmd];
90 } else {
91 return "unknown";
92 }
93}
94
95static int
96vg_sock_fd_read(int sock, void *buf, ssize_t buflen)
97{
98 int ret;
99
100 do {
101 ret = read(sock, buf, buflen);
102 } while (ret < 0 && (errno == EINTR || errno == EAGAIN));
103
104 g_warn_if_fail(ret == buflen);
105 return ret;
106}
107
108static void
109vg_sock_fd_close(VuGpu *g)
110{
111 if (g->sock_fd >= 0) {
112 close(g->sock_fd);
113 g->sock_fd = -1;
114 }
115}
116
117static gboolean
118source_wait_cb(gint fd, GIOCondition condition, gpointer user_data)
119{
120 VuGpu *g = user_data;
121
122 if (!vg_recv_msg(g, VHOST_USER_GPU_DMABUF_UPDATE, 0, NULL)) {
123 return G_SOURCE_CONTINUE;
124 }
125
126
127 g->wait_in = 0;
128 vg_handle_ctrl(&g->dev.parent, 0);
129
130 return G_SOURCE_REMOVE;
131}
132
133void
134vg_wait_ok(VuGpu *g)
135{
136 assert(g->wait_in == 0);
137 g->wait_in = g_unix_fd_add(g->sock_fd, G_IO_IN | G_IO_HUP,
138 source_wait_cb, g);
139}
140
141static int
142vg_sock_fd_write(int sock, const void *buf, ssize_t buflen, int fd)
143{
144 ssize_t ret;
145 struct iovec iov = {
146 .iov_base = (void *)buf,
147 .iov_len = buflen,
148 };
149 struct msghdr msg = {
150 .msg_iov = &iov,
151 .msg_iovlen = 1,
152 };
153 union {
154 struct cmsghdr cmsghdr;
155 char control[CMSG_SPACE(sizeof(int))];
156 } cmsgu;
157 struct cmsghdr *cmsg;
158
159 if (fd != -1) {
160 msg.msg_control = cmsgu.control;
161 msg.msg_controllen = sizeof(cmsgu.control);
162
163 cmsg = CMSG_FIRSTHDR(&msg);
164 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
165 cmsg->cmsg_level = SOL_SOCKET;
166 cmsg->cmsg_type = SCM_RIGHTS;
167
168 *((int *)CMSG_DATA(cmsg)) = fd;
169 }
170
171 do {
172 ret = sendmsg(sock, &msg, 0);
173 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
174
175 g_warn_if_fail(ret == buflen);
176 return ret;
177}
178
179void
180vg_send_msg(VuGpu *vg, const VhostUserGpuMsg *msg, int fd)
181{
182 if (vg_sock_fd_write(vg->sock_fd, msg,
183 VHOST_USER_GPU_HDR_SIZE + msg->size, fd) < 0) {
184 vg_sock_fd_close(vg);
185 }
186}
187
188bool
189vg_recv_msg(VuGpu *g, uint32_t expect_req, uint32_t expect_size,
190 gpointer payload)
191{
192 uint32_t req, flags, size;
193
194 if (vg_sock_fd_read(g->sock_fd, &req, sizeof(req)) < 0 ||
195 vg_sock_fd_read(g->sock_fd, &flags, sizeof(flags)) < 0 ||
196 vg_sock_fd_read(g->sock_fd, &size, sizeof(size)) < 0) {
197 goto err;
198 }
199
200 g_return_val_if_fail(req == expect_req, false);
201 g_return_val_if_fail(flags & VHOST_USER_GPU_MSG_FLAG_REPLY, false);
202 g_return_val_if_fail(size == expect_size, false);
203
204 if (size && vg_sock_fd_read(g->sock_fd, payload, size) != size) {
205 goto err;
206 }
207
208 return true;
209
210err:
211 vg_sock_fd_close(g);
212 return false;
213}
214
215static struct virtio_gpu_simple_resource *
216virtio_gpu_find_resource(VuGpu *g, uint32_t resource_id)
217{
218 struct virtio_gpu_simple_resource *res;
219
220 QTAILQ_FOREACH(res, &g->reslist, next) {
221 if (res->resource_id == resource_id) {
222 return res;
223 }
224 }
225 return NULL;
226}
227
228void
229vg_ctrl_response(VuGpu *g,
230 struct virtio_gpu_ctrl_command *cmd,
231 struct virtio_gpu_ctrl_hdr *resp,
232 size_t resp_len)
233{
234 size_t s;
235
236 if (cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE) {
237 resp->flags |= VIRTIO_GPU_FLAG_FENCE;
238 resp->fence_id = cmd->cmd_hdr.fence_id;
239 resp->ctx_id = cmd->cmd_hdr.ctx_id;
240 }
241 virtio_gpu_ctrl_hdr_bswap(resp);
242 s = iov_from_buf(cmd->elem.in_sg, cmd->elem.in_num, 0, resp, resp_len);
243 if (s != resp_len) {
244 g_critical("%s: response size incorrect %zu vs %zu",
245 __func__, s, resp_len);
246 }
247 vu_queue_push(&g->dev.parent, cmd->vq, &cmd->elem, s);
248 vu_queue_notify(&g->dev.parent, cmd->vq);
249 cmd->state = VG_CMD_STATE_FINISHED;
250}
251
252void
253vg_ctrl_response_nodata(VuGpu *g,
254 struct virtio_gpu_ctrl_command *cmd,
255 enum virtio_gpu_ctrl_type type)
256{
257 struct virtio_gpu_ctrl_hdr resp = {
258 .type = type,
259 };
260
261 vg_ctrl_response(g, cmd, &resp, sizeof(resp));
262}
263
264
265static gboolean
266get_display_info_cb(gint fd, GIOCondition condition, gpointer user_data)
267{
268 struct virtio_gpu_resp_display_info dpy_info = { {} };
269 VuGpu *vg = user_data;
270 struct virtio_gpu_ctrl_command *cmd = QTAILQ_LAST(&vg->fenceq);
271
272 g_debug("disp info cb");
273 assert(cmd->cmd_hdr.type == VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
274 if (!vg_recv_msg(vg, VHOST_USER_GPU_GET_DISPLAY_INFO,
275 sizeof(dpy_info), &dpy_info)) {
276 return G_SOURCE_CONTINUE;
277 }
278
279 QTAILQ_REMOVE(&vg->fenceq, cmd, next);
280 vg_ctrl_response(vg, cmd, &dpy_info.hdr, sizeof(dpy_info));
281
282 vg->wait_in = 0;
283 vg_handle_ctrl(&vg->dev.parent, 0);
284
285 return G_SOURCE_REMOVE;
286}
287
288void
289vg_get_display_info(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
290{
291 VhostUserGpuMsg msg = {
292 .request = VHOST_USER_GPU_GET_DISPLAY_INFO,
293 .size = 0,
294 };
295
296 assert(vg->wait_in == 0);
297
298 vg_send_msg(vg, &msg, -1);
299 vg->wait_in = g_unix_fd_add(vg->sock_fd, G_IO_IN | G_IO_HUP,
300 get_display_info_cb, vg);
301 cmd->state = VG_CMD_STATE_PENDING;
302}
303
304static void
305vg_resource_create_2d(VuGpu *g,
306 struct virtio_gpu_ctrl_command *cmd)
307{
308 pixman_format_code_t pformat;
309 struct virtio_gpu_simple_resource *res;
310 struct virtio_gpu_resource_create_2d c2d;
311
312 VUGPU_FILL_CMD(c2d);
313 virtio_gpu_bswap_32(&c2d, sizeof(c2d));
314
315 if (c2d.resource_id == 0) {
316 g_critical("%s: resource id 0 is not allowed", __func__);
317 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
318 return;
319 }
320
321 res = virtio_gpu_find_resource(g, c2d.resource_id);
322 if (res) {
323 g_critical("%s: resource already exists %d", __func__, c2d.resource_id);
324 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
325 return;
326 }
327
328 res = g_new0(struct virtio_gpu_simple_resource, 1);
329 res->width = c2d.width;
330 res->height = c2d.height;
331 res->format = c2d.format;
332 res->resource_id = c2d.resource_id;
333
334 pformat = virtio_gpu_get_pixman_format(c2d.format);
335 if (!pformat) {
336 g_critical("%s: host couldn't handle guest format %d",
337 __func__, c2d.format);
338 g_free(res);
339 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
340 return;
341 }
342 vugbm_buffer_create(&res->buffer, &g->gdev, c2d.width, c2d.height);
343 res->image = pixman_image_create_bits(pformat,
344 c2d.width,
345 c2d.height,
346 (uint32_t *)res->buffer.mmap,
347 res->buffer.stride);
348 if (!res->image) {
349 g_critical("%s: resource creation failed %d %d %d",
350 __func__, c2d.resource_id, c2d.width, c2d.height);
351 g_free(res);
352 vugbm_buffer_destroy(&res->buffer);
353 cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
354 return;
355 }
356
357 QTAILQ_INSERT_HEAD(&g->reslist, res, next);
358}
359
360static void
361vg_disable_scanout(VuGpu *g, int scanout_id)
362{
363 struct virtio_gpu_scanout *scanout = &g->scanout[scanout_id];
364 struct virtio_gpu_simple_resource *res;
365
366 if (scanout->resource_id == 0) {
367 return;
368 }
369
370 res = virtio_gpu_find_resource(g, scanout->resource_id);
371 if (res) {
372 res->scanout_bitmask &= ~(1 << scanout_id);
373 }
374
375 scanout->width = 0;
376 scanout->height = 0;
377
378 if (g->sock_fd >= 0) {
379 VhostUserGpuMsg msg = {
380 .request = VHOST_USER_GPU_SCANOUT,
381 .size = sizeof(VhostUserGpuScanout),
382 .payload.scanout.scanout_id = scanout_id,
383 };
384 vg_send_msg(g, &msg, -1);
385 }
386}
387
388static void
389vg_resource_destroy(VuGpu *g,
390 struct virtio_gpu_simple_resource *res)
391{
392 int i;
393
394 if (res->scanout_bitmask) {
395 for (i = 0; i < VIRTIO_GPU_MAX_SCANOUTS; i++) {
396 if (res->scanout_bitmask & (1 << i)) {
397 vg_disable_scanout(g, i);
398 }
399 }
400 }
401
402 vugbm_buffer_destroy(&res->buffer);
403 g_free(res->iov);
404 pixman_image_unref(res->image);
405 QTAILQ_REMOVE(&g->reslist, res, next);
406 g_free(res);
407}
408
409static void
410vg_resource_unref(VuGpu *g,
411 struct virtio_gpu_ctrl_command *cmd)
412{
413 struct virtio_gpu_simple_resource *res;
414 struct virtio_gpu_resource_unref unref;
415
416 VUGPU_FILL_CMD(unref);
417 virtio_gpu_bswap_32(&unref, sizeof(unref));
418
419 res = virtio_gpu_find_resource(g, unref.resource_id);
420 if (!res) {
421 g_critical("%s: illegal resource specified %d",
422 __func__, unref.resource_id);
423 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
424 return;
425 }
426 vg_resource_destroy(g, res);
427}
428
429int
430vg_create_mapping_iov(VuGpu *g,
431 struct virtio_gpu_resource_attach_backing *ab,
432 struct virtio_gpu_ctrl_command *cmd,
433 struct iovec **iov)
434{
435 struct virtio_gpu_mem_entry *ents;
436 size_t esize, s;
437 int i;
438
439 if (ab->nr_entries > 16384) {
440 g_critical("%s: nr_entries is too big (%d > 16384)",
441 __func__, ab->nr_entries);
442 return -1;
443 }
444
445 esize = sizeof(*ents) * ab->nr_entries;
446 ents = g_malloc(esize);
447 s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
448 sizeof(*ab), ents, esize);
449 if (s != esize) {
450 g_critical("%s: command data size incorrect %zu vs %zu",
451 __func__, s, esize);
452 g_free(ents);
453 return -1;
454 }
455
456 *iov = g_malloc0(sizeof(struct iovec) * ab->nr_entries);
457 for (i = 0; i < ab->nr_entries; i++) {
458 uint64_t len = ents[i].length;
459 (*iov)[i].iov_len = ents[i].length;
460 (*iov)[i].iov_base = vu_gpa_to_va(&g->dev.parent, &len, ents[i].addr);
461 if (!(*iov)[i].iov_base || len != ents[i].length) {
462 g_critical("%s: resource %d element %d",
463 __func__, ab->resource_id, i);
464 g_free(*iov);
465 g_free(ents);
466 *iov = NULL;
467 return -1;
468 }
469 }
470 g_free(ents);
471 return 0;
472}
473
474static void
475vg_resource_attach_backing(VuGpu *g,
476 struct virtio_gpu_ctrl_command *cmd)
477{
478 struct virtio_gpu_simple_resource *res;
479 struct virtio_gpu_resource_attach_backing ab;
480 int ret;
481
482 VUGPU_FILL_CMD(ab);
483 virtio_gpu_bswap_32(&ab, sizeof(ab));
484
485 res = virtio_gpu_find_resource(g, ab.resource_id);
486 if (!res) {
487 g_critical("%s: illegal resource specified %d",
488 __func__, ab.resource_id);
489 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
490 return;
491 }
492
493 if (res->iov) {
494 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
495 return;
496 }
497
498 ret = vg_create_mapping_iov(g, &ab, cmd, &res->iov);
499 if (ret != 0) {
500 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
501 return;
502 }
503
504 res->iov_cnt = ab.nr_entries;
505}
506
507static void
508vg_resource_detach_backing(VuGpu *g,
509 struct virtio_gpu_ctrl_command *cmd)
510{
511 struct virtio_gpu_simple_resource *res;
512 struct virtio_gpu_resource_detach_backing detach;
513
514 VUGPU_FILL_CMD(detach);
515 virtio_gpu_bswap_32(&detach, sizeof(detach));
516
517 res = virtio_gpu_find_resource(g, detach.resource_id);
518 if (!res || !res->iov) {
519 g_critical("%s: illegal resource specified %d",
520 __func__, detach.resource_id);
521 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
522 return;
523 }
524
525 g_free(res->iov);
526 res->iov = NULL;
527 res->iov_cnt = 0;
528}
529
530static void
531vg_transfer_to_host_2d(VuGpu *g,
532 struct virtio_gpu_ctrl_command *cmd)
533{
534 struct virtio_gpu_simple_resource *res;
535 int h;
536 uint32_t src_offset, dst_offset, stride;
537 int bpp;
538 pixman_format_code_t format;
539 struct virtio_gpu_transfer_to_host_2d t2d;
540
541 VUGPU_FILL_CMD(t2d);
542 virtio_gpu_t2d_bswap(&t2d);
543
544 res = virtio_gpu_find_resource(g, t2d.resource_id);
545 if (!res || !res->iov) {
546 g_critical("%s: illegal resource specified %d",
547 __func__, t2d.resource_id);
548 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
549 return;
550 }
551
552 if (t2d.r.x > res->width ||
553 t2d.r.y > res->height ||
554 t2d.r.width > res->width ||
555 t2d.r.height > res->height ||
556 t2d.r.x + t2d.r.width > res->width ||
557 t2d.r.y + t2d.r.height > res->height) {
558 g_critical("%s: transfer bounds outside resource"
559 " bounds for resource %d: %d %d %d %d vs %d %d",
560 __func__, t2d.resource_id, t2d.r.x, t2d.r.y,
561 t2d.r.width, t2d.r.height, res->width, res->height);
562 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
563 return;
564 }
565
566 format = pixman_image_get_format(res->image);
567 bpp = (PIXMAN_FORMAT_BPP(format) + 7) / 8;
568 stride = pixman_image_get_stride(res->image);
569
570 if (t2d.offset || t2d.r.x || t2d.r.y ||
571 t2d.r.width != pixman_image_get_width(res->image)) {
572 void *img_data = pixman_image_get_data(res->image);
573 for (h = 0; h < t2d.r.height; h++) {
574 src_offset = t2d.offset + stride * h;
575 dst_offset = (t2d.r.y + h) * stride + (t2d.r.x * bpp);
576
577 iov_to_buf(res->iov, res->iov_cnt, src_offset,
578 img_data
579 + dst_offset, t2d.r.width * bpp);
580 }
581 } else {
582 iov_to_buf(res->iov, res->iov_cnt, 0,
583 pixman_image_get_data(res->image),
584 pixman_image_get_stride(res->image)
585 * pixman_image_get_height(res->image));
586 }
587}
588
589static void
590vg_set_scanout(VuGpu *g,
591 struct virtio_gpu_ctrl_command *cmd)
592{
593 struct virtio_gpu_simple_resource *res, *ores;
594 struct virtio_gpu_scanout *scanout;
595 struct virtio_gpu_set_scanout ss;
596 int fd;
597
598 VUGPU_FILL_CMD(ss);
599 virtio_gpu_bswap_32(&ss, sizeof(ss));
600
601 if (ss.scanout_id >= VIRTIO_GPU_MAX_SCANOUTS) {
602 g_critical("%s: illegal scanout id specified %d",
603 __func__, ss.scanout_id);
604 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
605 return;
606 }
607
608 if (ss.resource_id == 0) {
609 vg_disable_scanout(g, ss.scanout_id);
610 return;
611 }
612
613
614 res = virtio_gpu_find_resource(g, ss.resource_id);
615 if (!res) {
616 g_critical("%s: illegal resource specified %d",
617 __func__, ss.resource_id);
618 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
619 return;
620 }
621
622 if (ss.r.x > res->width ||
623 ss.r.y > res->height ||
624 ss.r.width > res->width ||
625 ss.r.height > res->height ||
626 ss.r.x + ss.r.width > res->width ||
627 ss.r.y + ss.r.height > res->height) {
628 g_critical("%s: illegal scanout %d bounds for"
629 " resource %d, (%d,%d)+%d,%d vs %d %d",
630 __func__, ss.scanout_id, ss.resource_id, ss.r.x, ss.r.y,
631 ss.r.width, ss.r.height, res->width, res->height);
632 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
633 return;
634 }
635
636 scanout = &g->scanout[ss.scanout_id];
637
638 ores = virtio_gpu_find_resource(g, scanout->resource_id);
639 if (ores) {
640 ores->scanout_bitmask &= ~(1 << ss.scanout_id);
641 }
642
643 res->scanout_bitmask |= (1 << ss.scanout_id);
644 scanout->resource_id = ss.resource_id;
645 scanout->x = ss.r.x;
646 scanout->y = ss.r.y;
647 scanout->width = ss.r.width;
648 scanout->height = ss.r.height;
649
650 struct vugbm_buffer *buffer = &res->buffer;
651
652 if (vugbm_buffer_can_get_dmabuf_fd(buffer)) {
653 VhostUserGpuMsg msg = {
654 .request = VHOST_USER_GPU_DMABUF_SCANOUT,
655 .size = sizeof(VhostUserGpuDMABUFScanout),
656 .payload.dmabuf_scanout = (VhostUserGpuDMABUFScanout) {
657 .scanout_id = ss.scanout_id,
658 .x = ss.r.x,
659 .y = ss.r.y,
660 .width = ss.r.width,
661 .height = ss.r.height,
662 .fd_width = buffer->width,
663 .fd_height = buffer->height,
664 .fd_stride = buffer->stride,
665 .fd_drm_fourcc = buffer->format
666 }
667 };
668
669 if (vugbm_buffer_get_dmabuf_fd(buffer, &fd)) {
670 vg_send_msg(g, &msg, fd);
671 close(fd);
672 }
673 } else {
674 VhostUserGpuMsg msg = {
675 .request = VHOST_USER_GPU_SCANOUT,
676 .size = sizeof(VhostUserGpuScanout),
677 .payload.scanout = (VhostUserGpuScanout) {
678 .scanout_id = ss.scanout_id,
679 .width = scanout->width,
680 .height = scanout->height
681 }
682 };
683 vg_send_msg(g, &msg, -1);
684 }
685}
686
687static void
688vg_resource_flush(VuGpu *g,
689 struct virtio_gpu_ctrl_command *cmd)
690{
691 struct virtio_gpu_simple_resource *res;
692 struct virtio_gpu_resource_flush rf;
693 pixman_region16_t flush_region;
694 int i;
695
696 VUGPU_FILL_CMD(rf);
697 virtio_gpu_bswap_32(&rf, sizeof(rf));
698
699 res = virtio_gpu_find_resource(g, rf.resource_id);
700 if (!res) {
701 g_critical("%s: illegal resource specified %d\n",
702 __func__, rf.resource_id);
703 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
704 return;
705 }
706
707 if (rf.r.x > res->width ||
708 rf.r.y > res->height ||
709 rf.r.width > res->width ||
710 rf.r.height > res->height ||
711 rf.r.x + rf.r.width > res->width ||
712 rf.r.y + rf.r.height > res->height) {
713 g_critical("%s: flush bounds outside resource"
714 " bounds for resource %d: %d %d %d %d vs %d %d\n",
715 __func__, rf.resource_id, rf.r.x, rf.r.y,
716 rf.r.width, rf.r.height, res->width, res->height);
717 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
718 return;
719 }
720
721 pixman_region_init_rect(&flush_region,
722 rf.r.x, rf.r.y, rf.r.width, rf.r.height);
723 for (i = 0; i < VIRTIO_GPU_MAX_SCANOUTS; i++) {
724 struct virtio_gpu_scanout *scanout;
725 pixman_region16_t region, finalregion;
726 pixman_box16_t *extents;
727
728 if (!(res->scanout_bitmask & (1 << i))) {
729 continue;
730 }
731 scanout = &g->scanout[i];
732
733 pixman_region_init(&finalregion);
734 pixman_region_init_rect(®ion, scanout->x, scanout->y,
735 scanout->width, scanout->height);
736
737 pixman_region_intersect(&finalregion, &flush_region, ®ion);
738
739 extents = pixman_region_extents(&finalregion);
740 size_t width = extents->x2 - extents->x1;
741 size_t height = extents->y2 - extents->y1;
742
743 if (vugbm_buffer_can_get_dmabuf_fd(&res->buffer)) {
744 VhostUserGpuMsg vmsg = {
745 .request = VHOST_USER_GPU_DMABUF_UPDATE,
746 .size = sizeof(VhostUserGpuUpdate),
747 .payload.update = (VhostUserGpuUpdate) {
748 .scanout_id = i,
749 .x = extents->x1,
750 .y = extents->y1,
751 .width = width,
752 .height = height,
753 }
754 };
755 vg_send_msg(g, &vmsg, -1);
756 vg_wait_ok(g);
757 } else {
758 size_t bpp =
759 PIXMAN_FORMAT_BPP(pixman_image_get_format(res->image)) / 8;
760 size_t size = width * height * bpp;
761
762 void *p = g_malloc(VHOST_USER_GPU_HDR_SIZE +
763 sizeof(VhostUserGpuUpdate) + size);
764 VhostUserGpuMsg *msg = p;
765 msg->request = VHOST_USER_GPU_UPDATE;
766 msg->size = sizeof(VhostUserGpuUpdate) + size;
767 msg->payload.update = (VhostUserGpuUpdate) {
768 .scanout_id = i,
769 .x = extents->x1,
770 .y = extents->y1,
771 .width = width,
772 .height = height,
773 };
774 pixman_image_t *i =
775 pixman_image_create_bits(pixman_image_get_format(res->image),
776 msg->payload.update.width,
777 msg->payload.update.height,
778 p + offsetof(VhostUserGpuMsg,
779 payload.update.data),
780 width * bpp);
781 pixman_image_composite(PIXMAN_OP_SRC,
782 res->image, NULL, i,
783 extents->x1, extents->y1,
784 0, 0, 0, 0,
785 width, height);
786 pixman_image_unref(i);
787 vg_send_msg(g, msg, -1);
788 g_free(msg);
789 }
790 pixman_region_fini(®ion);
791 pixman_region_fini(&finalregion);
792 }
793 pixman_region_fini(&flush_region);
794}
795
796static void
797vg_process_cmd(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
798{
799 switch (cmd->cmd_hdr.type) {
800 case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
801 vg_get_display_info(vg, cmd);
802 break;
803 case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
804 vg_resource_create_2d(vg, cmd);
805 break;
806 case VIRTIO_GPU_CMD_RESOURCE_UNREF:
807 vg_resource_unref(vg, cmd);
808 break;
809 case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
810 vg_resource_flush(vg, cmd);
811 break;
812 case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
813 vg_transfer_to_host_2d(vg, cmd);
814 break;
815 case VIRTIO_GPU_CMD_SET_SCANOUT:
816 vg_set_scanout(vg, cmd);
817 break;
818 case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
819 vg_resource_attach_backing(vg, cmd);
820 break;
821 case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
822 vg_resource_detach_backing(vg, cmd);
823 break;
824
825
826 default:
827 g_warning("TODO handle ctrl %x\n", cmd->cmd_hdr.type);
828 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
829 break;
830 }
831 if (cmd->state == VG_CMD_STATE_NEW) {
832 vg_ctrl_response_nodata(vg, cmd, cmd->error ? cmd->error :
833 VIRTIO_GPU_RESP_OK_NODATA);
834 }
835}
836
837static void
838vg_handle_ctrl(VuDev *dev, int qidx)
839{
840 VuGpu *vg = container_of(dev, VuGpu, dev.parent);
841 VuVirtq *vq = vu_get_queue(dev, qidx);
842 struct virtio_gpu_ctrl_command *cmd = NULL;
843 size_t len;
844
845 for (;;) {
846 if (vg->wait_in != 0) {
847 return;
848 }
849
850 cmd = vu_queue_pop(dev, vq, sizeof(struct virtio_gpu_ctrl_command));
851 if (!cmd) {
852 break;
853 }
854 cmd->vq = vq;
855 cmd->error = 0;
856 cmd->state = VG_CMD_STATE_NEW;
857
858 len = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
859 0, &cmd->cmd_hdr, sizeof(cmd->cmd_hdr));
860 if (len != sizeof(cmd->cmd_hdr)) {
861 g_warning("%s: command size incorrect %zu vs %zu\n",
862 __func__, len, sizeof(cmd->cmd_hdr));
863 }
864
865 virtio_gpu_ctrl_hdr_bswap(&cmd->cmd_hdr);
866 g_debug("%d %s\n", cmd->cmd_hdr.type,
867 vg_cmd_to_string(cmd->cmd_hdr.type));
868
869 if (vg->virgl) {
870 vg_virgl_process_cmd(vg, cmd);
871 } else {
872 vg_process_cmd(vg, cmd);
873 }
874
875 if (cmd->state != VG_CMD_STATE_FINISHED) {
876 QTAILQ_INSERT_TAIL(&vg->fenceq, cmd, next);
877 vg->inflight++;
878 } else {
879 free(cmd);
880 }
881 }
882}
883
884static void
885update_cursor_data_simple(VuGpu *g, uint32_t resource_id, gpointer data)
886{
887 struct virtio_gpu_simple_resource *res;
888
889 res = virtio_gpu_find_resource(g, resource_id);
890 g_return_if_fail(res != NULL);
891 g_return_if_fail(pixman_image_get_width(res->image) == 64);
892 g_return_if_fail(pixman_image_get_height(res->image) == 64);
893 g_return_if_fail(
894 PIXMAN_FORMAT_BPP(pixman_image_get_format(res->image)) == 32);
895
896 memcpy(data, pixman_image_get_data(res->image), 64 * 64 * sizeof(uint32_t));
897}
898
899static void
900vg_process_cursor_cmd(VuGpu *g, struct virtio_gpu_update_cursor *cursor)
901{
902 switch (cursor->hdr.type) {
903 case VIRTIO_GPU_CMD_MOVE_CURSOR: {
904 VhostUserGpuMsg msg = {
905 .request = cursor->resource_id ?
906 VHOST_USER_GPU_CURSOR_POS : VHOST_USER_GPU_CURSOR_POS_HIDE,
907 .size = sizeof(VhostUserGpuCursorPos),
908 .payload.cursor_pos = {
909 .scanout_id = cursor->pos.scanout_id,
910 .x = cursor->pos.x,
911 .y = cursor->pos.y,
912 }
913 };
914 g_debug("%s: move", G_STRFUNC);
915 vg_send_msg(g, &msg, -1);
916 break;
917 }
918 case VIRTIO_GPU_CMD_UPDATE_CURSOR: {
919 VhostUserGpuMsg msg = {
920 .request = VHOST_USER_GPU_CURSOR_UPDATE,
921 .size = sizeof(VhostUserGpuCursorUpdate),
922 .payload.cursor_update = {
923 .pos = {
924 .scanout_id = cursor->pos.scanout_id,
925 .x = cursor->pos.x,
926 .y = cursor->pos.y,
927 },
928 .hot_x = cursor->hot_x,
929 .hot_y = cursor->hot_y,
930 }
931 };
932 g_debug("%s: update", G_STRFUNC);
933 if (g->virgl) {
934 vg_virgl_update_cursor_data(g, cursor->resource_id,
935 msg.payload.cursor_update.data);
936 } else {
937 update_cursor_data_simple(g, cursor->resource_id,
938 msg.payload.cursor_update.data);
939 }
940 vg_send_msg(g, &msg, -1);
941 break;
942 }
943 default:
944 g_debug("%s: unknown cmd %d", G_STRFUNC, cursor->hdr.type);
945 break;
946 }
947}
948
949static void
950vg_handle_cursor(VuDev *dev, int qidx)
951{
952 VuGpu *g = container_of(dev, VuGpu, dev.parent);
953 VuVirtq *vq = vu_get_queue(dev, qidx);
954 VuVirtqElement *elem;
955 size_t len;
956 struct virtio_gpu_update_cursor cursor;
957
958 for (;;) {
959 elem = vu_queue_pop(dev, vq, sizeof(VuVirtqElement));
960 if (!elem) {
961 break;
962 }
963 g_debug("cursor out:%d in:%d\n", elem->out_num, elem->in_num);
964
965 len = iov_to_buf(elem->out_sg, elem->out_num,
966 0, &cursor, sizeof(cursor));
967 if (len != sizeof(cursor)) {
968 g_warning("%s: cursor size incorrect %zu vs %zu\n",
969 __func__, len, sizeof(cursor));
970 } else {
971 virtio_gpu_bswap_32(&cursor, sizeof(cursor));
972 vg_process_cursor_cmd(g, &cursor);
973 }
974 vu_queue_push(dev, vq, elem, 0);
975 vu_queue_notify(dev, vq);
976 free(elem);
977 }
978}
979
980static void
981vg_panic(VuDev *dev, const char *msg)
982{
983 g_critical("%s\n", msg);
984 exit(1);
985}
986
987static void
988vg_queue_set_started(VuDev *dev, int qidx, bool started)
989{
990 VuVirtq *vq = vu_get_queue(dev, qidx);
991
992 g_debug("queue started %d:%d\n", qidx, started);
993
994 switch (qidx) {
995 case 0:
996 vu_set_queue_handler(dev, vq, started ? vg_handle_ctrl : NULL);
997 break;
998 case 1:
999 vu_set_queue_handler(dev, vq, started ? vg_handle_cursor : NULL);
1000 break;
1001 default:
1002 break;
1003 }
1004}
1005
1006static gboolean
1007protocol_features_cb(gint fd, GIOCondition condition, gpointer user_data)
1008{
1009 VuGpu *g = user_data;
1010 uint64_t u64;
1011 VhostUserGpuMsg msg = {
1012 .request = VHOST_USER_GPU_GET_PROTOCOL_FEATURES
1013 };
1014
1015 if (!vg_recv_msg(g, msg.request, sizeof(u64), &u64)) {
1016 return G_SOURCE_CONTINUE;
1017 }
1018
1019 msg = (VhostUserGpuMsg) {
1020 .request = VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
1021 .size = sizeof(uint64_t),
1022 .payload.u64 = 0
1023 };
1024 vg_send_msg(g, &msg, -1);
1025
1026 g->wait_in = 0;
1027 vg_handle_ctrl(&g->dev.parent, 0);
1028
1029 return G_SOURCE_REMOVE;
1030}
1031
1032static void
1033set_gpu_protocol_features(VuGpu *g)
1034{
1035 VhostUserGpuMsg msg = {
1036 .request = VHOST_USER_GPU_GET_PROTOCOL_FEATURES
1037 };
1038
1039 vg_send_msg(g, &msg, -1);
1040 assert(g->wait_in == 0);
1041 g->wait_in = g_unix_fd_add(g->sock_fd, G_IO_IN | G_IO_HUP,
1042 protocol_features_cb, g);
1043}
1044
1045static int
1046vg_process_msg(VuDev *dev, VhostUserMsg *msg, int *do_reply)
1047{
1048 VuGpu *g = container_of(dev, VuGpu, dev.parent);
1049
1050 switch (msg->request) {
1051 case VHOST_USER_GPU_SET_SOCKET: {
1052 g_return_val_if_fail(msg->fd_num == 1, 1);
1053 g_return_val_if_fail(g->sock_fd == -1, 1);
1054 g->sock_fd = msg->fds[0];
1055 set_gpu_protocol_features(g);
1056 return 1;
1057 }
1058 default:
1059 return 0;
1060 }
1061
1062 return 0;
1063}
1064
1065static uint64_t
1066vg_get_features(VuDev *dev)
1067{
1068 uint64_t features = 0;
1069
1070 if (opt_virgl) {
1071 features |= 1 << VIRTIO_GPU_F_VIRGL;
1072 }
1073
1074 return features;
1075}
1076
1077static void
1078vg_set_features(VuDev *dev, uint64_t features)
1079{
1080 VuGpu *g = container_of(dev, VuGpu, dev.parent);
1081 bool virgl = features & (1 << VIRTIO_GPU_F_VIRGL);
1082
1083 if (virgl && !g->virgl_inited) {
1084 if (!vg_virgl_init(g)) {
1085 vg_panic(dev, "Failed to initialize virgl");
1086 }
1087 g->virgl_inited = true;
1088 }
1089
1090 g->virgl = virgl;
1091}
1092
1093static int
1094vg_get_config(VuDev *dev, uint8_t *config, uint32_t len)
1095{
1096 VuGpu *g = container_of(dev, VuGpu, dev.parent);
1097
1098 if (len > sizeof(struct virtio_gpu_config)) {
1099 return -1;
1100 }
1101
1102 if (opt_virgl) {
1103 g->virtio_config.num_capsets = vg_virgl_get_num_capsets();
1104 }
1105
1106 memcpy(config, &g->virtio_config, len);
1107
1108 return 0;
1109}
1110
1111static int
1112vg_set_config(VuDev *dev, const uint8_t *data,
1113 uint32_t offset, uint32_t size,
1114 uint32_t flags)
1115{
1116 VuGpu *g = container_of(dev, VuGpu, dev.parent);
1117 struct virtio_gpu_config *config = (struct virtio_gpu_config *)data;
1118
1119 if (config->events_clear) {
1120 g->virtio_config.events_read &= ~config->events_clear;
1121 }
1122
1123 return 0;
1124}
1125
1126static const VuDevIface vuiface = {
1127 .set_features = vg_set_features,
1128 .get_features = vg_get_features,
1129 .queue_set_started = vg_queue_set_started,
1130 .process_msg = vg_process_msg,
1131 .get_config = vg_get_config,
1132 .set_config = vg_set_config,
1133};
1134
1135static void
1136vg_destroy(VuGpu *g)
1137{
1138 struct virtio_gpu_simple_resource *res, *tmp;
1139
1140 vug_deinit(&g->dev);
1141
1142 vg_sock_fd_close(g);
1143
1144 QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) {
1145 vg_resource_destroy(g, res);
1146 }
1147
1148 vugbm_device_destroy(&g->gdev);
1149}
1150
1151static GOptionEntry entries[] = {
1152 { "print-capabilities", 'c', 0, G_OPTION_ARG_NONE, &opt_print_caps,
1153 "Print capabilities", NULL },
1154 { "fd", 'f', 0, G_OPTION_ARG_INT, &opt_fdnum,
1155 "Use inherited fd socket", "FDNUM" },
1156 { "socket-path", 's', 0, G_OPTION_ARG_FILENAME, &opt_socket_path,
1157 "Use UNIX socket path", "PATH" },
1158 { "render-node", 'r', 0, G_OPTION_ARG_FILENAME, &opt_render_node,
1159 "Specify DRM render node", "PATH" },
1160 { "virgl", 'v', 0, G_OPTION_ARG_NONE, &opt_virgl,
1161 "Turn virgl rendering on", NULL },
1162 { NULL, }
1163};
1164
1165int
1166main(int argc, char *argv[])
1167{
1168 GOptionContext *context;
1169 GError *error = NULL;
1170 GMainLoop *loop = NULL;
1171 int fd;
1172 VuGpu g = { .sock_fd = -1, .drm_rnode_fd = -1 };
1173
1174 QTAILQ_INIT(&g.reslist);
1175 QTAILQ_INIT(&g.fenceq);
1176
1177 context = g_option_context_new("QEMU vhost-user-gpu");
1178 g_option_context_add_main_entries(context, entries, NULL);
1179 if (!g_option_context_parse(context, &argc, &argv, &error)) {
1180 g_printerr("Option parsing failed: %s\n", error->message);
1181 exit(EXIT_FAILURE);
1182 }
1183 g_option_context_free(context);
1184
1185 if (opt_print_caps) {
1186 g_print("{\n");
1187 g_print(" \"type\": \"gpu\",\n");
1188 g_print(" \"features\": [\n");
1189 g_print(" \"render-node\",\n");
1190 g_print(" \"virgl\"\n");
1191 g_print(" ]\n");
1192 g_print("}\n");
1193 exit(EXIT_SUCCESS);
1194 }
1195
1196 g.drm_rnode_fd = qemu_drm_rendernode_open(opt_render_node);
1197 if (opt_render_node && g.drm_rnode_fd == -1) {
1198 g_printerr("Failed to open DRM rendernode.\n");
1199 exit(EXIT_FAILURE);
1200 }
1201
1202 vugbm_device_init(&g.gdev, g.drm_rnode_fd);
1203
1204 if ((!!opt_socket_path + (opt_fdnum != -1)) != 1) {
1205 g_printerr("Please specify either --fd or --socket-path\n");
1206 exit(EXIT_FAILURE);
1207 }
1208
1209 if (opt_socket_path) {
1210 int lsock = unix_listen(opt_socket_path, &error_fatal);
1211 if (lsock < 0) {
1212 g_printerr("Failed to listen on %s.\n", opt_socket_path);
1213 exit(EXIT_FAILURE);
1214 }
1215 fd = accept(lsock, NULL, NULL);
1216 close(lsock);
1217 } else {
1218 fd = opt_fdnum;
1219 }
1220 if (fd == -1) {
1221 g_printerr("Invalid vhost-user socket.\n");
1222 exit(EXIT_FAILURE);
1223 }
1224
1225 if (!vug_init(&g.dev, VHOST_USER_GPU_MAX_QUEUES, fd, vg_panic, &vuiface)) {
1226 g_printerr("Failed to initialize libvhost-user-glib.\n");
1227 exit(EXIT_FAILURE);
1228 }
1229
1230 loop = g_main_loop_new(NULL, FALSE);
1231 g_main_loop_run(loop);
1232 g_main_loop_unref(loop);
1233
1234 vg_destroy(&g);
1235 if (g.drm_rnode_fd >= 0) {
1236 close(g.drm_rnode_fd);
1237 }
1238
1239 return 0;
1240}
1241
