hw/display/vhost-user-gpu.c

   1 /*
   2  * vhost-user GPU Device
   3  *
   4  * Copyright Red Hat, Inc. 2018
   5  *
   6  * Authors:
   7  *     Marc-André Lureau <marcandre.lureau@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qemu/error-report.h"
  15 #include "qemu/sockets.h"
  16 #include "hw/qdev-properties.h"
  17 #include "hw/virtio/virtio-gpu.h"
  18 #include "chardev/char-fe.h"
  19 #include "qapi/error.h"
  20 #include "migration/blocker.h"
  21
  22 typedef enum VhostUserGpuRequest {
  23     VHOST_USER_GPU_NONE = 0,
  24     VHOST_USER_GPU_GET_PROTOCOL_FEATURES,
  25     VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
  26     VHOST_USER_GPU_GET_DISPLAY_INFO,
  27     VHOST_USER_GPU_CURSOR_POS,
  28     VHOST_USER_GPU_CURSOR_POS_HIDE,
  29     VHOST_USER_GPU_CURSOR_UPDATE,
  30     VHOST_USER_GPU_SCANOUT,
  31     VHOST_USER_GPU_UPDATE,
  32     VHOST_USER_GPU_DMABUF_SCANOUT,
  33     VHOST_USER_GPU_DMABUF_UPDATE,
  34     VHOST_USER_GPU_GET_EDID,
  35     VHOST_USER_GPU_DMABUF_SCANOUT2,
  36 } VhostUserGpuRequest;
  37
  38 typedef struct VhostUserGpuDisplayInfoReply {
  39     struct virtio_gpu_resp_display_info info;
  40 } VhostUserGpuDisplayInfoReply;
  41
  42 typedef struct VhostUserGpuCursorPos {
  43     uint32_t scanout_id;
  44     uint32_t x;
  45     uint32_t y;
  46 } QEMU_PACKED VhostUserGpuCursorPos;
  47
  48 typedef struct VhostUserGpuCursorUpdate {
  49     VhostUserGpuCursorPos pos;
  50     uint32_t hot_x;
  51     uint32_t hot_y;
  52     uint32_t data[64 * 64];
  53 } QEMU_PACKED VhostUserGpuCursorUpdate;
  54
  55 typedef struct VhostUserGpuScanout {
  56     uint32_t scanout_id;
  57     uint32_t width;
  58     uint32_t height;
  59 } QEMU_PACKED VhostUserGpuScanout;
  60
  61 typedef struct VhostUserGpuUpdate {
  62     uint32_t scanout_id;
  63     uint32_t x;
  64     uint32_t y;
  65     uint32_t width;
  66     uint32_t height;
  67     uint8_t data[];
  68 } QEMU_PACKED VhostUserGpuUpdate;
  69
  70 typedef struct VhostUserGpuDMABUFScanout {
  71     uint32_t scanout_id;
  72     uint32_t x;
  73     uint32_t y;
  74     uint32_t width;
  75     uint32_t height;
  76     uint32_t fd_width;
  77     uint32_t fd_height;
  78     uint32_t fd_stride;
  79     uint32_t fd_flags;
  80     int fd_drm_fourcc;
  81 } QEMU_PACKED VhostUserGpuDMABUFScanout;
  82
  83 typedef struct VhostUserGpuDMABUFScanout2 {
  84     struct VhostUserGpuDMABUFScanout dmabuf_scanout;
  85     uint64_t modifier;
  86 } QEMU_PACKED VhostUserGpuDMABUFScanout2;
  87
  88 typedef struct VhostUserGpuEdidRequest {
  89     uint32_t scanout_id;
  90 } QEMU_PACKED VhostUserGpuEdidRequest;
  91
  92 typedef struct VhostUserGpuMsg {
  93     uint32_t request; /* VhostUserGpuRequest */
  94     uint32_t flags;
  95     uint32_t size; /* the following payload size */
  96     union {
  97         VhostUserGpuCursorPos cursor_pos;
  98         VhostUserGpuCursorUpdate cursor_update;
  99         VhostUserGpuScanout scanout;
 100         VhostUserGpuUpdate update;
 101         VhostUserGpuDMABUFScanout dmabuf_scanout;
 102         VhostUserGpuDMABUFScanout2 dmabuf_scanout2;
 103         VhostUserGpuEdidRequest edid_req;
 104         struct virtio_gpu_resp_edid resp_edid;
 105         struct virtio_gpu_resp_display_info display_info;
 106         uint64_t u64;
 107     } payload;
 108 } QEMU_PACKED VhostUserGpuMsg;
 109
 110 static VhostUserGpuMsg m __attribute__ ((unused));
 111 #define VHOST_USER_GPU_HDR_SIZE \
 112     (sizeof(m.request) + sizeof(m.size) + sizeof(m.flags))
 113
 114 #define VHOST_USER_GPU_MSG_FLAG_REPLY 0x4
 115
 116 #define VHOST_USER_GPU_PROTOCOL_F_EDID 0
 117 #define VHOST_USER_GPU_PROTOCOL_F_DMABUF2 1
 118
 119 static void vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked);
 120
 121 static void
 122 vhost_user_gpu_handle_cursor(VhostUserGPU *g, VhostUserGpuMsg *msg)
 123 {
 124     VhostUserGpuCursorPos *pos = &msg->payload.cursor_pos;
 125     struct virtio_gpu_scanout *s;
 126
 127     if (pos->scanout_id >= g->parent_obj.conf.max_outputs) {
 128         return;
 129     }
 130     s = &g->parent_obj.scanout[pos->scanout_id];
 131
 132     if (msg->request == VHOST_USER_GPU_CURSOR_UPDATE) {
 133         VhostUserGpuCursorUpdate *up = &msg->payload.cursor_update;
 134         if (!s->current_cursor) {
 135             s->current_cursor = cursor_alloc(64, 64);
 136         }
 137
 138         s->current_cursor->hot_x = up->hot_x;
 139         s->current_cursor->hot_y = up->hot_y;
 140
 141         memcpy(s->current_cursor->data, up->data,
 142                64 * 64 * sizeof(uint32_t));
 143
 144         dpy_cursor_define(s->con, s->current_cursor);
 145     }
 146
 147     dpy_mouse_set(s->con, pos->x, pos->y,
 148                   msg->request != VHOST_USER_GPU_CURSOR_POS_HIDE);
 149 }
 150
 151 static void
 152 vhost_user_gpu_send_msg(VhostUserGPU *g, const VhostUserGpuMsg *msg)
 153 {
 154     qemu_chr_fe_write(&g->vhost_chr, (uint8_t *)msg,
 155                       VHOST_USER_GPU_HDR_SIZE + msg->size);
 156 }
 157
 158 static void
 159 vhost_user_gpu_unblock(VhostUserGPU *g)
 160 {
 161     VhostUserGpuMsg msg = {
 162         .request = VHOST_USER_GPU_DMABUF_UPDATE,
 163         .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 164     };
 165
 166     vhost_user_gpu_send_msg(g, &msg);
 167 }
 168
 169 static void
 170 vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
 171 {
 172     QemuConsole *con = NULL;
 173     struct virtio_gpu_scanout *s;
 174
 175     switch (msg->request) {
 176     case VHOST_USER_GPU_GET_PROTOCOL_FEATURES: {
 177         VhostUserGpuMsg reply = {
 178             .request = msg->request,
 179             .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 180             .size = sizeof(uint64_t),
 181             .payload = {
 182                 .u64 = (1 << VHOST_USER_GPU_PROTOCOL_F_EDID) |
 183                        (1 << VHOST_USER_GPU_PROTOCOL_F_DMABUF2)
 184             }
 185         };
 186
 187         vhost_user_gpu_send_msg(g, &reply);
 188         break;
 189     }
 190     case VHOST_USER_GPU_SET_PROTOCOL_FEATURES: {
 191         break;
 192     }
 193     case VHOST_USER_GPU_GET_DISPLAY_INFO: {
 194         struct virtio_gpu_resp_display_info display_info = { {} };
 195         VhostUserGpuMsg reply = {
 196             .request = msg->request,
 197             .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 198             .size = sizeof(struct virtio_gpu_resp_display_info),
 199         };
 200
 201         display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
 202         virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
 203         memcpy(&reply.payload.display_info, &display_info,
 204                sizeof(display_info));
 205         vhost_user_gpu_send_msg(g, &reply);
 206         break;
 207     }
 208     case VHOST_USER_GPU_GET_EDID: {
 209         VhostUserGpuEdidRequest *m = &msg->payload.edid_req;
 210         struct virtio_gpu_resp_edid resp = { {} };
 211         VhostUserGpuMsg reply = {
 212             .request = msg->request,
 213             .flags = VHOST_USER_GPU_MSG_FLAG_REPLY,
 214             .size = sizeof(reply.payload.resp_edid),
 215         };
 216
 217         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 218             error_report("invalid scanout: %d", m->scanout_id);
 219             break;
 220         }
 221
 222         resp.hdr.type = VIRTIO_GPU_RESP_OK_EDID;
 223         virtio_gpu_base_generate_edid(VIRTIO_GPU_BASE(g), m->scanout_id, &resp);
 224         memcpy(&reply.payload.resp_edid, &resp, sizeof(resp));
 225         vhost_user_gpu_send_msg(g, &reply);
 226         break;
 227     }
 228     case VHOST_USER_GPU_SCANOUT: {
 229         VhostUserGpuScanout *m = &msg->payload.scanout;
 230
 231         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 232             return;
 233         }
 234
 235         g->parent_obj.enable = 1;
 236         s = &g->parent_obj.scanout[m->scanout_id];
 237         con = s->con;
 238
 239         if (m->width == 0) {
 240             dpy_gfx_replace_surface(con, NULL);
 241         } else {
 242             s->ds = qemu_create_displaysurface(m->width, m->height);
 243             /* replace surface on next update */
 244         }
 245
 246         break;
 247     }
 248     case VHOST_USER_GPU_DMABUF_SCANOUT2:
 249     case VHOST_USER_GPU_DMABUF_SCANOUT: {
 250         VhostUserGpuDMABUFScanout *m = &msg->payload.dmabuf_scanout;
 251         int fd = qemu_chr_fe_get_msgfd(&g->vhost_chr);
 252         QemuDmaBuf *dmabuf;
 253
 254         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 255             error_report("invalid scanout: %d", m->scanout_id);
 256             if (fd >= 0) {
 257                 close(fd);
 258             }
 259             break;
 260         }
 261
 262         g->parent_obj.enable = 1;
 263         con = g->parent_obj.scanout[m->scanout_id].con;
 264         dmabuf = &g->dmabuf[m->scanout_id];
 265         if (dmabuf->fd >= 0) {
 266             close(dmabuf->fd);
 267             dmabuf->fd = -1;
 268         }
 269         dpy_gl_release_dmabuf(con, dmabuf);
 270         if (fd == -1) {
 271             dpy_gl_scanout_disable(con);
 272             break;
 273         }
 274         *dmabuf = (QemuDmaBuf) {
 275             .fd = fd,
 276             .width = m->fd_width,
 277             .height = m->fd_height,
 278             .stride = m->fd_stride,
 279             .fourcc = m->fd_drm_fourcc,
 280             .y0_top = m->fd_flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
 281         };
 282         if (msg->request == VHOST_USER_GPU_DMABUF_SCANOUT2) {
 283             VhostUserGpuDMABUFScanout2 *m2 = &msg->payload.dmabuf_scanout2;
 284             dmabuf->modifier = m2->modifier;
 285         }
 286
 287         dpy_gl_scanout_dmabuf(con, dmabuf);
 288         break;
 289     }
 290     case VHOST_USER_GPU_DMABUF_UPDATE: {
 291         VhostUserGpuUpdate *m = &msg->payload.update;
 292
 293         if (m->scanout_id >= g->parent_obj.conf.max_outputs ||
 294             !g->parent_obj.scanout[m->scanout_id].con) {
 295             error_report("invalid scanout update: %d", m->scanout_id);
 296             vhost_user_gpu_unblock(g);
 297             break;
 298         }
 299
 300         con = g->parent_obj.scanout[m->scanout_id].con;
 301         if (!console_has_gl(con)) {
 302             error_report("console doesn't support GL!");
 303             vhost_user_gpu_unblock(g);
 304             break;
 305         }
 306         g->backend_blocked = true;
 307         dpy_gl_update(con, m->x, m->y, m->width, m->height);
 308         break;
 309     }
 310 #ifdef CONFIG_PIXMAN
 311     case VHOST_USER_GPU_UPDATE: {
 312         VhostUserGpuUpdate *m = &msg->payload.update;
 313
 314         if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
 315             break;
 316         }
 317         s = &g->parent_obj.scanout[m->scanout_id];
 318         con = s->con;
 319         pixman_image_t *image =
 320             pixman_image_create_bits(PIXMAN_x8r8g8b8,
 321                                      m->width,
 322                                      m->height,
 323                                      (uint32_t *)m->data,
 324                                      m->width * 4);
 325
 326         pixman_image_composite(PIXMAN_OP_SRC,
 327                                image, NULL, s->ds->image,
 328                                0, 0, 0, 0, m->x, m->y, m->width, m->height);
 329
 330         pixman_image_unref(image);
 331         if (qemu_console_surface(con) != s->ds) {
 332             dpy_gfx_replace_surface(con, s->ds);
 333         } else {
 334             dpy_gfx_update(con, m->x, m->y, m->width, m->height);
 335         }
 336         break;
 337     }
 338 #endif
 339     default:
 340         g_warning("unhandled message %d %d", msg->request, msg->size);
 341     }
 342
 343     if (con && qemu_console_is_gl_blocked(con)) {
 344         vhost_user_gpu_update_blocked(g, true);
 345     }
 346 }
 347
 348 static void
 349 vhost_user_gpu_chr_read(void *opaque)
 350 {
 351     VhostUserGPU *g = opaque;
 352     VhostUserGpuMsg *msg = NULL;
 353     VhostUserGpuRequest request;
 354     uint32_t size, flags;
 355     int r;
 356
 357     r = qemu_chr_fe_read_all(&g->vhost_chr,
 358                              (uint8_t *)&request, sizeof(uint32_t));
 359     if (r != sizeof(uint32_t)) {
 360         error_report("failed to read msg header: %d, %d", r, errno);
 361         goto end;
 362     }
 363
 364     r = qemu_chr_fe_read_all(&g->vhost_chr,
 365                              (uint8_t *)&flags, sizeof(uint32_t));
 366     if (r != sizeof(uint32_t)) {
 367         error_report("failed to read msg flags");
 368         goto end;
 369     }
 370
 371     r = qemu_chr_fe_read_all(&g->vhost_chr,
 372                              (uint8_t *)&size, sizeof(uint32_t));
 373     if (r != sizeof(uint32_t)) {
 374         error_report("failed to read msg size");
 375         goto end;
 376     }
 377
 378     msg = g_malloc(VHOST_USER_GPU_HDR_SIZE + size);
 379
 380     r = qemu_chr_fe_read_all(&g->vhost_chr,
 381                              (uint8_t *)&msg->payload, size);
 382     if (r != size) {
 383         error_report("failed to read msg payload %d != %d", r, size);
 384         goto end;
 385     }
 386
 387     msg->request = request;
 388     msg->flags = size;
 389     msg->size = size;
 390
 391     if (request == VHOST_USER_GPU_CURSOR_UPDATE ||
 392         request == VHOST_USER_GPU_CURSOR_POS ||
 393         request == VHOST_USER_GPU_CURSOR_POS_HIDE) {
 394         vhost_user_gpu_handle_cursor(g, msg);
 395     } else {
 396         vhost_user_gpu_handle_display(g, msg);
 397     }
 398
 399 end:
 400     g_free(msg);
 401 }
 402
 403 static void
 404 vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked)
 405 {
 406     qemu_set_fd_handler(g->vhost_gpu_fd,
 407                         blocked ? NULL : vhost_user_gpu_chr_read, NULL, g);
 408 }
 409
 410 static void
 411 vhost_user_gpu_gl_flushed(VirtIOGPUBase *b)
 412 {
 413     VhostUserGPU *g = VHOST_USER_GPU(b);
 414
 415     if (g->backend_blocked) {
 416         vhost_user_gpu_unblock(g);
 417         g->backend_blocked = false;
 418     }
 419
 420     vhost_user_gpu_update_blocked(g, false);
 421 }
 422
 423 static bool
 424 vhost_user_gpu_do_set_socket(VhostUserGPU *g, Error **errp)
 425 {
 426     Chardev *chr;
 427     int sv[2];
 428
 429     if (qemu_socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
 430         error_setg_errno(errp, errno, "socketpair() failed");
 431         return false;
 432     }
 433
 434     chr = CHARDEV(object_new(TYPE_CHARDEV_SOCKET));
 435     if (!chr || qemu_chr_add_client(chr, sv[0]) == -1) {
 436         error_setg(errp, "Failed to make socket chardev");
 437         goto err;
 438     }
 439     if (!qemu_chr_fe_init(&g->vhost_chr, chr, errp)) {
 440         goto err;
 441     }
 442     if (vhost_user_gpu_set_socket(&g->vhost->dev, sv[1]) < 0) {
 443         error_setg(errp, "Failed to set vhost-user-gpu socket");
 444         qemu_chr_fe_deinit(&g->vhost_chr, false);
 445         goto err;
 446     }
 447
 448     g->vhost_gpu_fd = sv[0];
 449     vhost_user_gpu_update_blocked(g, false);
 450     close(sv[1]);
 451     return true;
 452
 453 err:
 454     close(sv[0]);
 455     close(sv[1]);
 456     if (chr) {
 457         object_unref(OBJECT(chr));
 458     }
 459     return false;
 460 }
 461
 462 static void
 463 vhost_user_gpu_get_config(VirtIODevice *vdev, uint8_t *config_data)
 464 {
 465     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 466     VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
 467     struct virtio_gpu_config *vgconfig =
 468         (struct virtio_gpu_config *)config_data;
 469     Error *local_err = NULL;
 470     int ret;
 471
 472     memset(config_data, 0, sizeof(struct virtio_gpu_config));
 473
 474     ret = vhost_dev_get_config(&g->vhost->dev,
 475                                config_data, sizeof(struct virtio_gpu_config),
 476                                &local_err);
 477     if (ret) {
 478         error_report_err(local_err);
 479         return;
 480     }
 481
 482     /* those fields are managed by qemu */
 483     vgconfig->num_scanouts = b->virtio_config.num_scanouts;
 484     vgconfig->events_read = b->virtio_config.events_read;
 485     vgconfig->events_clear = b->virtio_config.events_clear;
 486 }
 487
 488 static void
 489 vhost_user_gpu_set_config(VirtIODevice *vdev,
 490                           const uint8_t *config_data)
 491 {
 492     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 493     VirtIOGPUBase *b = VIRTIO_GPU_BASE(vdev);
 494     const struct virtio_gpu_config *vgconfig =
 495         (const struct virtio_gpu_config *)config_data;
 496     int ret;
 497
 498     if (vgconfig->events_clear) {
 499         b->virtio_config.events_read &= ~vgconfig->events_clear;
 500     }
 501
 502     ret = vhost_dev_set_config(&g->vhost->dev, config_data,
 503                                0, sizeof(struct virtio_gpu_config),
 504                                VHOST_SET_CONFIG_TYPE_FRONTEND);
 505     if (ret) {
 506         error_report("vhost-user-gpu: set device config space failed");
 507         return;
 508     }
 509 }
 510
 511 static void
 512 vhost_user_gpu_set_status(VirtIODevice *vdev, uint8_t val)
 513 {
 514     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 515     Error *err = NULL;
 516
 517     if (val & VIRTIO_CONFIG_S_DRIVER_OK && vdev->vm_running) {
 518         if (!vhost_user_gpu_do_set_socket(g, &err)) {
 519             error_report_err(err);
 520             return;
 521         }
 522         vhost_user_backend_start(g->vhost);
 523     } else {
 524         /* unblock any wait and stop processing */
 525         if (g->vhost_gpu_fd != -1) {
 526             vhost_user_gpu_update_blocked(g, true);
 527             qemu_chr_fe_deinit(&g->vhost_chr, true);
 528             g->vhost_gpu_fd = -1;
 529         }
 530         vhost_user_backend_stop(g->vhost);
 531     }
 532 }
 533
 534 static bool
 535 vhost_user_gpu_guest_notifier_pending(VirtIODevice *vdev, int idx)
 536 {
 537     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 538
 539     /*
 540      * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
 541      * as the macro of configure interrupt's IDX, If this driver does not
 542      * support, the function will return
 543      */
 544
 545     if (idx == VIRTIO_CONFIG_IRQ_IDX) {
 546         return false;
 547     }
 548     return vhost_virtqueue_pending(&g->vhost->dev, idx);
 549 }
 550
 551 static void
 552 vhost_user_gpu_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
 553 {
 554     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 555
 556     /*
 557      * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
 558      * as the macro of configure interrupt's IDX, If this driver does not
 559      * support, the function will return
 560      */
 561
 562     if (idx == VIRTIO_CONFIG_IRQ_IDX) {
 563         return;
 564     }
 565     vhost_virtqueue_mask(&g->vhost->dev, vdev, idx, mask);
 566 }
 567
 568 static void
 569 vhost_user_gpu_instance_init(Object *obj)
 570 {
 571     VhostUserGPU *g = VHOST_USER_GPU(obj);
 572
 573     g->vhost = VHOST_USER_BACKEND(object_new(TYPE_VHOST_USER_BACKEND));
 574     object_property_add_alias(obj, "chardev",
 575                               OBJECT(g->vhost), "chardev");
 576 }
 577
 578 static void
 579 vhost_user_gpu_instance_finalize(Object *obj)
 580 {
 581     VhostUserGPU *g = VHOST_USER_GPU(obj);
 582
 583     object_unref(OBJECT(g->vhost));
 584 }
 585
 586 static void
 587 vhost_user_gpu_reset(VirtIODevice *vdev)
 588 {
 589     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 590
 591     virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
 592
 593     vhost_user_backend_stop(g->vhost);
 594 }
 595
 596 static int
 597 vhost_user_gpu_config_change(struct vhost_dev *dev)
 598 {
 599     error_report("vhost-user-gpu: unhandled backend config change");
 600     return -1;
 601 }
 602
 603 static const VhostDevConfigOps config_ops = {
 604     .vhost_dev_config_notifier = vhost_user_gpu_config_change,
 605 };
 606
 607 static void
 608 vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
 609 {
 610     VhostUserGPU *g = VHOST_USER_GPU(qdev);
 611     VirtIODevice *vdev = VIRTIO_DEVICE(g);
 612
 613     vhost_dev_set_config_notifier(&g->vhost->dev, &config_ops);
 614     if (vhost_user_backend_dev_init(g->vhost, vdev, 2, errp) < 0) {
 615         return;
 616     }
 617
 618     /* existing backend may send DMABUF, so let's add that requirement */
 619     g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED;
 620     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
 621         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
 622     }
 623     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_EDID)) {
 624         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_EDID_ENABLED;
 625     } else {
 626         error_report("EDID requested but the backend doesn't support it.");
 627         g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_EDID_ENABLED);
 628     }
 629
 630     if (!virtio_gpu_base_device_realize(qdev, NULL, NULL, errp)) {
 631         return;
 632     }
 633
 634     g->vhost_gpu_fd = -1;
 635 }
 636
 637 static struct vhost_dev *vhost_user_gpu_get_vhost(VirtIODevice *vdev)
 638 {
 639     VhostUserGPU *g = VHOST_USER_GPU(vdev);
 640     return &g->vhost->dev;
 641 }
 642
 643 static Property vhost_user_gpu_properties[] = {
 644     VIRTIO_GPU_BASE_PROPERTIES(VhostUserGPU, parent_obj.conf),
 645     DEFINE_PROP_END_OF_LIST(),
 646 };
 647
 648 static void
 649 vhost_user_gpu_class_init(ObjectClass *klass, void *data)
 650 {
 651     DeviceClass *dc = DEVICE_CLASS(klass);
 652     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 653     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
 654
 655     vgc->gl_flushed = vhost_user_gpu_gl_flushed;
 656
 657     vdc->realize = vhost_user_gpu_device_realize;
 658     vdc->reset = vhost_user_gpu_reset;
 659     vdc->set_status   = vhost_user_gpu_set_status;
 660     vdc->guest_notifier_mask = vhost_user_gpu_guest_notifier_mask;
 661     vdc->guest_notifier_pending = vhost_user_gpu_guest_notifier_pending;
 662     vdc->get_config = vhost_user_gpu_get_config;
 663     vdc->set_config = vhost_user_gpu_set_config;
 664     vdc->get_vhost = vhost_user_gpu_get_vhost;
 665
 666     device_class_set_props(dc, vhost_user_gpu_properties);
 667 }
 668
 669 static const TypeInfo vhost_user_gpu_info = {
 670     .name = TYPE_VHOST_USER_GPU,
 671     .parent = TYPE_VIRTIO_GPU_BASE,
 672     .instance_size = sizeof(VhostUserGPU),
 673     .instance_init = vhost_user_gpu_instance_init,
 674     .instance_finalize = vhost_user_gpu_instance_finalize,
 675     .class_init = vhost_user_gpu_class_init,
 676 };
 677 module_obj(TYPE_VHOST_USER_GPU);
 678 module_kconfig(VHOST_USER_GPU);
 679
 680 static void vhost_user_gpu_register_types(void)
 681 {
 682     type_register_static(&vhost_user_gpu_info);
 683 }
 684
 685 type_init(vhost_user_gpu_register_types)