hw/display/virtio-gpu.c

   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/units.h"
  16 #include "qemu/iov.h"
  17 #include "ui/console.h"
  18 #include "trace.h"
  19 #include "sysemu/dma.h"
  20 #include "sysemu/sysemu.h"
  21 #include "hw/virtio/virtio.h"
  22 #include "migration/qemu-file-types.h"
  23 #include "hw/virtio/virtio-gpu.h"
  24 #include "hw/virtio/virtio-gpu-bswap.h"
  25 #include "hw/virtio/virtio-gpu-pixman.h"
  26 #include "hw/virtio/virtio-bus.h"
  27 #include "hw/display/edid.h"
  28 #include "hw/qdev-properties.h"
  29 #include "qemu/log.h"
  30 #include "qemu/module.h"
  31 #include "qapi/error.h"
  32 #include "qemu/error-report.h"
  33
  34 #define VIRTIO_GPU_VM_VERSION 1
  35
  36 static struct virtio_gpu_simple_resource*
  37 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
  38
  39 static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
  40                                        struct virtio_gpu_simple_resource *res);
  41
  42 #ifdef CONFIG_VIRGL
  43 #include <virglrenderer.h>
  44 #define VIRGL(_g, _virgl, _simple, ...)                     \
  45     do {                                                    \
  46         if (_g->parent_obj.use_virgl_renderer) {            \
  47             _virgl(__VA_ARGS__);                            \
  48         } else {                                            \
  49             _simple(__VA_ARGS__);                           \
  50         }                                                   \
  51     } while (0)
  52 #else
  53 #define VIRGL(_g, _virgl, _simple, ...)                 \
  54     do {                                                \
  55         _simple(__VA_ARGS__);                           \
  56     } while (0)
  57 #endif
  58
  59 static void update_cursor_data_simple(VirtIOGPU *g,
  60                                       struct virtio_gpu_scanout *s,
  61                                       uint32_t resource_id)
  62 {
  63     struct virtio_gpu_simple_resource *res;
  64     uint32_t pixels;
  65
  66     res = virtio_gpu_find_resource(g, resource_id);
  67     if (!res) {
  68         return;
  69     }
  70
  71     if (pixman_image_get_width(res->image)  != s->current_cursor->width ||
  72         pixman_image_get_height(res->image) != s->current_cursor->height) {
  73         return;
  74     }
  75
  76     pixels = s->current_cursor->width * s->current_cursor->height;
  77     memcpy(s->current_cursor->data,
  78            pixman_image_get_data(res->image),
  79            pixels * sizeof(uint32_t));
  80 }
  81
  82 #ifdef CONFIG_VIRGL
  83
  84 static void update_cursor_data_virgl(VirtIOGPU *g,
  85                                      struct virtio_gpu_scanout *s,
  86                                      uint32_t resource_id)
  87 {
  88     uint32_t width, height;
  89     uint32_t pixels, *data;
  90
  91     data = virgl_renderer_get_cursor_data(resource_id, &width, &height);
  92     if (!data) {
  93         return;
  94     }
  95
  96     if (width != s->current_cursor->width ||
  97         height != s->current_cursor->height) {
  98         free(data);
  99         return;
 100     }
 101
 102     pixels = s->current_cursor->width * s->current_cursor->height;
 103     memcpy(s->current_cursor->data, data, pixels * sizeof(uint32_t));
 104     free(data);
 105 }
 106
 107 #endif
 108
 109 static void update_cursor(VirtIOGPU *g, struct virtio_gpu_update_cursor *cursor)
 110 {
 111     struct virtio_gpu_scanout *s;
 112     bool move = cursor->hdr.type == VIRTIO_GPU_CMD_MOVE_CURSOR;
 113
 114     if (cursor->pos.scanout_id >= g->parent_obj.conf.max_outputs) {
 115         return;
 116     }
 117     s = &g->parent_obj.scanout[cursor->pos.scanout_id];
 118
 119     trace_virtio_gpu_update_cursor(cursor->pos.scanout_id,
 120                                    cursor->pos.x,
 121                                    cursor->pos.y,
 122                                    move ? "move" : "update",
 123                                    cursor->resource_id);
 124
 125     if (!move) {
 126         if (!s->current_cursor) {
 127             s->current_cursor = cursor_alloc(64, 64);
 128         }
 129
 130         s->current_cursor->hot_x = cursor->hot_x;
 131         s->current_cursor->hot_y = cursor->hot_y;
 132
 133         if (cursor->resource_id > 0) {
 134             VIRGL(g, update_cursor_data_virgl, update_cursor_data_simple,
 135                   g, s, cursor->resource_id);
 136         }
 137         dpy_cursor_define(s->con, s->current_cursor);
 138
 139         s->cursor = *cursor;
 140     } else {
 141         s->cursor.pos.x = cursor->pos.x;
 142         s->cursor.pos.y = cursor->pos.y;
 143     }
 144     dpy_mouse_set(s->con, cursor->pos.x, cursor->pos.y,
 145                   cursor->resource_id ? 1 : 0);
 146 }
 147
 148 static struct virtio_gpu_simple_resource *
 149 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id)
 150 {
 151     struct virtio_gpu_simple_resource *res;
 152
 153     QTAILQ_FOREACH(res, &g->reslist, next) {
 154         if (res->resource_id == resource_id) {
 155             return res;
 156         }
 157     }
 158     return NULL;
 159 }
 160
 161 void virtio_gpu_ctrl_response(VirtIOGPU *g,
 162                               struct virtio_gpu_ctrl_command *cmd,
 163                               struct virtio_gpu_ctrl_hdr *resp,
 164                               size_t resp_len)
 165 {
 166     size_t s;
 167
 168     if (cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE) {
 169         resp->flags |= VIRTIO_GPU_FLAG_FENCE;
 170         resp->fence_id = cmd->cmd_hdr.fence_id;
 171         resp->ctx_id = cmd->cmd_hdr.ctx_id;
 172     }
 173     virtio_gpu_ctrl_hdr_bswap(resp);
 174     s = iov_from_buf(cmd->elem.in_sg, cmd->elem.in_num, 0, resp, resp_len);
 175     if (s != resp_len) {
 176         qemu_log_mask(LOG_GUEST_ERROR,
 177                       "%s: response size incorrect %zu vs %zu\n",
 178                       __func__, s, resp_len);
 179     }
 180     virtqueue_push(cmd->vq, &cmd->elem, s);
 181     virtio_notify(VIRTIO_DEVICE(g), cmd->vq);
 182     cmd->finished = true;
 183 }
 184
 185 void virtio_gpu_ctrl_response_nodata(VirtIOGPU *g,
 186                                      struct virtio_gpu_ctrl_command *cmd,
 187                                      enum virtio_gpu_ctrl_type type)
 188 {
 189     struct virtio_gpu_ctrl_hdr resp;
 190
 191     memset(&resp, 0, sizeof(resp));
 192     resp.type = type;
 193     virtio_gpu_ctrl_response(g, cmd, &resp, sizeof(resp));
 194 }
 195
 196 void virtio_gpu_get_display_info(VirtIOGPU *g,
 197                                  struct virtio_gpu_ctrl_command *cmd)
 198 {
 199     struct virtio_gpu_resp_display_info display_info;
 200
 201     trace_virtio_gpu_cmd_get_display_info();
 202     memset(&display_info, 0, sizeof(display_info));
 203     display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
 204     virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
 205     virtio_gpu_ctrl_response(g, cmd, &display_info.hdr,
 206                              sizeof(display_info));
 207 }
 208
 209 static void
 210 virtio_gpu_generate_edid(VirtIOGPU *g, int scanout,
 211                          struct virtio_gpu_resp_edid *edid)
 212 {
 213     VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
 214     qemu_edid_info info = {
 215         .width_mm = b->req_state[scanout].width_mm,
 216         .height_mm = b->req_state[scanout].height_mm,
 217         .prefx = b->req_state[scanout].width,
 218         .prefy = b->req_state[scanout].height,
 219     };
 220
 221     edid->size = cpu_to_le32(sizeof(edid->edid));
 222     qemu_edid_generate(edid->edid, sizeof(edid->edid), &info);
 223 }
 224
 225 void virtio_gpu_get_edid(VirtIOGPU *g,
 226                          struct virtio_gpu_ctrl_command *cmd)
 227 {
 228     struct virtio_gpu_resp_edid edid;
 229     struct virtio_gpu_cmd_get_edid get_edid;
 230     VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
 231
 232     VIRTIO_GPU_FILL_CMD(get_edid);
 233     virtio_gpu_bswap_32(&get_edid, sizeof(get_edid));
 234
 235     if (get_edid.scanout >= b->conf.max_outputs) {
 236         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 237         return;
 238     }
 239
 240     trace_virtio_gpu_cmd_get_edid(get_edid.scanout);
 241     memset(&edid, 0, sizeof(edid));
 242     edid.hdr.type = VIRTIO_GPU_RESP_OK_EDID;
 243     virtio_gpu_generate_edid(g, get_edid.scanout, &edid);
 244     virtio_gpu_ctrl_response(g, cmd, &edid.hdr, sizeof(edid));
 245 }
 246
 247 static uint32_t calc_image_hostmem(pixman_format_code_t pformat,
 248                                    uint32_t width, uint32_t height)
 249 {
 250     /* Copied from pixman/pixman-bits-image.c, skip integer overflow check.
 251      * pixman_image_create_bits will fail in case it overflow.
 252      */
 253
 254     int bpp = PIXMAN_FORMAT_BPP(pformat);
 255     int stride = ((width * bpp + 0x1f) >> 5) * sizeof(uint32_t);
 256     return height * stride;
 257 }
 258
 259 static void virtio_gpu_resource_create_2d(VirtIOGPU *g,
 260                                           struct virtio_gpu_ctrl_command *cmd)
 261 {
 262     pixman_format_code_t pformat;
 263     struct virtio_gpu_simple_resource *res;
 264     struct virtio_gpu_resource_create_2d c2d;
 265
 266     VIRTIO_GPU_FILL_CMD(c2d);
 267     virtio_gpu_bswap_32(&c2d, sizeof(c2d));
 268     trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
 269                                        c2d.width, c2d.height);
 270
 271     if (c2d.resource_id == 0) {
 272         qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
 273                       __func__);
 274         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 275         return;
 276     }
 277
 278     res = virtio_gpu_find_resource(g, c2d.resource_id);
 279     if (res) {
 280         qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
 281                       __func__, c2d.resource_id);
 282         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 283         return;
 284     }
 285
 286     res = g_new0(struct virtio_gpu_simple_resource, 1);
 287
 288     res->width = c2d.width;
 289     res->height = c2d.height;
 290     res->format = c2d.format;
 291     res->resource_id = c2d.resource_id;
 292
 293     pformat = virtio_gpu_get_pixman_format(c2d.format);
 294     if (!pformat) {
 295         qemu_log_mask(LOG_GUEST_ERROR,
 296                       "%s: host couldn't handle guest format %d\n",
 297                       __func__, c2d.format);
 298         g_free(res);
 299         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 300         return;
 301     }
 302
 303     res->hostmem = calc_image_hostmem(pformat, c2d.width, c2d.height);
 304     if (res->hostmem + g->hostmem < g->conf_max_hostmem) {
 305         res->image = pixman_image_create_bits(pformat,
 306                                               c2d.width,
 307                                               c2d.height,
 308                                               NULL, 0);
 309     }
 310
 311     if (!res->image) {
 312         qemu_log_mask(LOG_GUEST_ERROR,
 313                       "%s: resource creation failed %d %d %d\n",
 314                       __func__, c2d.resource_id, c2d.width, c2d.height);
 315         g_free(res);
 316         cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
 317         return;
 318     }
 319
 320     QTAILQ_INSERT_HEAD(&g->reslist, res, next);
 321     g->hostmem += res->hostmem;
 322 }
 323
 324 static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id)
 325 {
 326     struct virtio_gpu_scanout *scanout = &g->parent_obj.scanout[scanout_id];
 327     struct virtio_gpu_simple_resource *res;
 328     DisplaySurface *ds = NULL;
 329
 330     if (scanout->resource_id == 0) {
 331         return;
 332     }
 333
 334     res = virtio_gpu_find_resource(g, scanout->resource_id);
 335     if (res) {
 336         res->scanout_bitmask &= ~(1 << scanout_id);
 337     }
 338
 339     if (scanout_id == 0) {
 340         /* primary head */
 341         ds = qemu_create_message_surface(scanout->width  ?: 640,
 342                                          scanout->height ?: 480,
 343                                          "Guest disabled display.");
 344     }
 345     dpy_gfx_replace_surface(scanout->con, ds);
 346     scanout->resource_id = 0;
 347     scanout->ds = NULL;
 348     scanout->width = 0;
 349     scanout->height = 0;
 350 }
 351
 352 static void virtio_gpu_resource_destroy(VirtIOGPU *g,
 353                                         struct virtio_gpu_simple_resource *res)
 354 {
 355     int i;
 356
 357     if (res->scanout_bitmask) {
 358         for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
 359             if (res->scanout_bitmask & (1 << i)) {
 360                 virtio_gpu_disable_scanout(g, i);
 361             }
 362         }
 363     }
 364
 365     pixman_image_unref(res->image);
 366     virtio_gpu_cleanup_mapping(g, res);
 367     QTAILQ_REMOVE(&g->reslist, res, next);
 368     g->hostmem -= res->hostmem;
 369     g_free(res);
 370 }
 371
 372 static void virtio_gpu_resource_unref(VirtIOGPU *g,
 373                                       struct virtio_gpu_ctrl_command *cmd)
 374 {
 375     struct virtio_gpu_simple_resource *res;
 376     struct virtio_gpu_resource_unref unref;
 377
 378     VIRTIO_GPU_FILL_CMD(unref);
 379     virtio_gpu_bswap_32(&unref, sizeof(unref));
 380     trace_virtio_gpu_cmd_res_unref(unref.resource_id);
 381
 382     res = virtio_gpu_find_resource(g, unref.resource_id);
 383     if (!res) {
 384         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 385                       __func__, unref.resource_id);
 386         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 387         return;
 388     }
 389     virtio_gpu_resource_destroy(g, res);
 390 }
 391
 392 static void virtio_gpu_transfer_to_host_2d(VirtIOGPU *g,
 393                                            struct virtio_gpu_ctrl_command *cmd)
 394 {
 395     struct virtio_gpu_simple_resource *res;
 396     int h;
 397     uint32_t src_offset, dst_offset, stride;
 398     int bpp;
 399     pixman_format_code_t format;
 400     struct virtio_gpu_transfer_to_host_2d t2d;
 401
 402     VIRTIO_GPU_FILL_CMD(t2d);
 403     virtio_gpu_t2d_bswap(&t2d);
 404     trace_virtio_gpu_cmd_res_xfer_toh_2d(t2d.resource_id);
 405
 406     res = virtio_gpu_find_resource(g, t2d.resource_id);
 407     if (!res || !res->iov) {
 408         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 409                       __func__, t2d.resource_id);
 410         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 411         return;
 412     }
 413
 414     if (t2d.r.x > res->width ||
 415         t2d.r.y > res->height ||
 416         t2d.r.width > res->width ||
 417         t2d.r.height > res->height ||
 418         t2d.r.x + t2d.r.width > res->width ||
 419         t2d.r.y + t2d.r.height > res->height) {
 420         qemu_log_mask(LOG_GUEST_ERROR, "%s: transfer bounds outside resource"
 421                       " bounds for resource %d: %d %d %d %d vs %d %d\n",
 422                       __func__, t2d.resource_id, t2d.r.x, t2d.r.y,
 423                       t2d.r.width, t2d.r.height, res->width, res->height);
 424         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 425         return;
 426     }
 427
 428     format = pixman_image_get_format(res->image);
 429     bpp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
 430     stride = pixman_image_get_stride(res->image);
 431
 432     if (t2d.offset || t2d.r.x || t2d.r.y ||
 433         t2d.r.width != pixman_image_get_width(res->image)) {
 434         void *img_data = pixman_image_get_data(res->image);
 435         for (h = 0; h < t2d.r.height; h++) {
 436             src_offset = t2d.offset + stride * h;
 437             dst_offset = (t2d.r.y + h) * stride + (t2d.r.x * bpp);
 438
 439             iov_to_buf(res->iov, res->iov_cnt, src_offset,
 440                        (uint8_t *)img_data
 441                        + dst_offset, t2d.r.width * bpp);
 442         }
 443     } else {
 444         iov_to_buf(res->iov, res->iov_cnt, 0,
 445                    pixman_image_get_data(res->image),
 446                    pixman_image_get_stride(res->image)
 447                    * pixman_image_get_height(res->image));
 448     }
 449 }
 450
 451 static void virtio_gpu_resource_flush(VirtIOGPU *g,
 452                                       struct virtio_gpu_ctrl_command *cmd)
 453 {
 454     struct virtio_gpu_simple_resource *res;
 455     struct virtio_gpu_resource_flush rf;
 456     pixman_region16_t flush_region;
 457     int i;
 458
 459     VIRTIO_GPU_FILL_CMD(rf);
 460     virtio_gpu_bswap_32(&rf, sizeof(rf));
 461     trace_virtio_gpu_cmd_res_flush(rf.resource_id,
 462                                    rf.r.width, rf.r.height, rf.r.x, rf.r.y);
 463
 464     res = virtio_gpu_find_resource(g, rf.resource_id);
 465     if (!res) {
 466         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 467                       __func__, rf.resource_id);
 468         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 469         return;
 470     }
 471
 472     if (rf.r.x > res->width ||
 473         rf.r.y > res->height ||
 474         rf.r.width > res->width ||
 475         rf.r.height > res->height ||
 476         rf.r.x + rf.r.width > res->width ||
 477         rf.r.y + rf.r.height > res->height) {
 478         qemu_log_mask(LOG_GUEST_ERROR, "%s: flush bounds outside resource"
 479                       " bounds for resource %d: %d %d %d %d vs %d %d\n",
 480                       __func__, rf.resource_id, rf.r.x, rf.r.y,
 481                       rf.r.width, rf.r.height, res->width, res->height);
 482         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 483         return;
 484     }
 485
 486     pixman_region_init_rect(&flush_region,
 487                             rf.r.x, rf.r.y, rf.r.width, rf.r.height);
 488     for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
 489         struct virtio_gpu_scanout *scanout;
 490         pixman_region16_t region, finalregion;
 491         pixman_box16_t *extents;
 492
 493         if (!(res->scanout_bitmask & (1 << i))) {
 494             continue;
 495         }
 496         scanout = &g->parent_obj.scanout[i];
 497
 498         pixman_region_init(&finalregion);
 499         pixman_region_init_rect(&region, scanout->x, scanout->y,
 500                                 scanout->width, scanout->height);
 501
 502         pixman_region_intersect(&finalregion, &flush_region, &region);
 503         pixman_region_translate(&finalregion, -scanout->x, -scanout->y);
 504         extents = pixman_region_extents(&finalregion);
 505         /* work out the area we need to update for each console */
 506         dpy_gfx_update(g->parent_obj.scanout[i].con,
 507                        extents->x1, extents->y1,
 508                        extents->x2 - extents->x1,
 509                        extents->y2 - extents->y1);
 510
 511         pixman_region_fini(&region);
 512         pixman_region_fini(&finalregion);
 513     }
 514     pixman_region_fini(&flush_region);
 515 }
 516
 517 static void virtio_unref_resource(pixman_image_t *image, void *data)
 518 {
 519     pixman_image_unref(data);
 520 }
 521
 522 static void virtio_gpu_set_scanout(VirtIOGPU *g,
 523                                    struct virtio_gpu_ctrl_command *cmd)
 524 {
 525     struct virtio_gpu_simple_resource *res, *ores;
 526     struct virtio_gpu_scanout *scanout;
 527     pixman_format_code_t format;
 528     uint32_t offset;
 529     int bpp;
 530     struct virtio_gpu_set_scanout ss;
 531
 532     VIRTIO_GPU_FILL_CMD(ss);
 533     virtio_gpu_bswap_32(&ss, sizeof(ss));
 534     trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
 535                                      ss.r.width, ss.r.height, ss.r.x, ss.r.y);
 536
 537     if (ss.scanout_id >= g->parent_obj.conf.max_outputs) {
 538         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
 539                       __func__, ss.scanout_id);
 540         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
 541         return;
 542     }
 543
 544     g->parent_obj.enable = 1;
 545     if (ss.resource_id == 0) {
 546         virtio_gpu_disable_scanout(g, ss.scanout_id);
 547         return;
 548     }
 549
 550     /* create a surface for this scanout */
 551     res = virtio_gpu_find_resource(g, ss.resource_id);
 552     if (!res) {
 553         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 554                       __func__, ss.resource_id);
 555         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 556         return;
 557     }
 558
 559     if (ss.r.x > res->width ||
 560         ss.r.y > res->height ||
 561         ss.r.width < 16 ||
 562         ss.r.height < 16 ||
 563         ss.r.width > res->width ||
 564         ss.r.height > res->height ||
 565         ss.r.x + ss.r.width > res->width ||
 566         ss.r.y + ss.r.height > res->height) {
 567         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout %d bounds for"
 568                       " resource %d, (%d,%d)+%d,%d vs %d %d\n",
 569                       __func__, ss.scanout_id, ss.resource_id, ss.r.x, ss.r.y,
 570                       ss.r.width, ss.r.height, res->width, res->height);
 571         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 572         return;
 573     }
 574
 575     scanout = &g->parent_obj.scanout[ss.scanout_id];
 576
 577     format = pixman_image_get_format(res->image);
 578     bpp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
 579     offset = (ss.r.x * bpp) + ss.r.y * pixman_image_get_stride(res->image);
 580     if (!scanout->ds || surface_data(scanout->ds)
 581         != ((uint8_t *)pixman_image_get_data(res->image) + offset) ||
 582         scanout->width != ss.r.width ||
 583         scanout->height != ss.r.height) {
 584         pixman_image_t *rect;
 585         void *ptr = (uint8_t *)pixman_image_get_data(res->image) + offset;
 586         rect = pixman_image_create_bits(format, ss.r.width, ss.r.height, ptr,
 587                                         pixman_image_get_stride(res->image));
 588         pixman_image_ref(res->image);
 589         pixman_image_set_destroy_function(rect, virtio_unref_resource,
 590                                           res->image);
 591         /* realloc the surface ptr */
 592         scanout->ds = qemu_create_displaysurface_pixman(rect);
 593         if (!scanout->ds) {
 594             cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 595             return;
 596         }
 597         pixman_image_unref(rect);
 598         dpy_gfx_replace_surface(g->parent_obj.scanout[ss.scanout_id].con,
 599                                 scanout->ds);
 600     }
 601
 602     ores = virtio_gpu_find_resource(g, scanout->resource_id);
 603     if (ores) {
 604         ores->scanout_bitmask &= ~(1 << ss.scanout_id);
 605     }
 606
 607     res->scanout_bitmask |= (1 << ss.scanout_id);
 608     scanout->resource_id = ss.resource_id;
 609     scanout->x = ss.r.x;
 610     scanout->y = ss.r.y;
 611     scanout->width = ss.r.width;
 612     scanout->height = ss.r.height;
 613 }
 614
 615 int virtio_gpu_create_mapping_iov(VirtIOGPU *g,
 616                                   struct virtio_gpu_resource_attach_backing *ab,
 617                                   struct virtio_gpu_ctrl_command *cmd,
 618                                   uint64_t **addr, struct iovec **iov)
 619 {
 620     struct virtio_gpu_mem_entry *ents;
 621     size_t esize, s;
 622     int i;
 623
 624     if (ab->nr_entries > 16384) {
 625         qemu_log_mask(LOG_GUEST_ERROR,
 626                       "%s: nr_entries is too big (%d > 16384)\n",
 627                       __func__, ab->nr_entries);
 628         return -1;
 629     }
 630
 631     esize = sizeof(*ents) * ab->nr_entries;
 632     ents = g_malloc(esize);
 633     s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
 634                    sizeof(*ab), ents, esize);
 635     if (s != esize) {
 636         qemu_log_mask(LOG_GUEST_ERROR,
 637                       "%s: command data size incorrect %zu vs %zu\n",
 638                       __func__, s, esize);
 639         g_free(ents);
 640         return -1;
 641     }
 642
 643     *iov = g_malloc0(sizeof(struct iovec) * ab->nr_entries);
 644     if (addr) {
 645         *addr = g_malloc0(sizeof(uint64_t) * ab->nr_entries);
 646     }
 647     for (i = 0; i < ab->nr_entries; i++) {
 648         uint64_t a = le64_to_cpu(ents[i].addr);
 649         uint32_t l = le32_to_cpu(ents[i].length);
 650         hwaddr len = l;
 651         (*iov)[i].iov_base = dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
 652                                             a, &len, DMA_DIRECTION_TO_DEVICE);
 653         (*iov)[i].iov_len = len;
 654         if (addr) {
 655             (*addr)[i] = a;
 656         }
 657         if (!(*iov)[i].iov_base || len != l) {
 658             qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to map MMIO memory for"
 659                           " resource %d element %d\n",
 660                           __func__, ab->resource_id, i);
 661             if ((*iov)[i].iov_base) {
 662                 i++; /* cleanup the 'i'th map */
 663             }
 664             virtio_gpu_cleanup_mapping_iov(g, *iov, i);
 665             g_free(ents);
 666             *iov = NULL;
 667             if (addr) {
 668                 g_free(*addr);
 669                 *addr = NULL;
 670             }
 671             return -1;
 672         }
 673     }
 674     g_free(ents);
 675     return 0;
 676 }
 677
 678 void virtio_gpu_cleanup_mapping_iov(VirtIOGPU *g,
 679                                     struct iovec *iov, uint32_t count)
 680 {
 681     int i;
 682
 683     for (i = 0; i < count; i++) {
 684         dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
 685                          iov[i].iov_base, iov[i].iov_len,
 686                          DMA_DIRECTION_TO_DEVICE,
 687                          iov[i].iov_len);
 688     }
 689     g_free(iov);
 690 }
 691
 692 static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
 693                                        struct virtio_gpu_simple_resource *res)
 694 {
 695     virtio_gpu_cleanup_mapping_iov(g, res->iov, res->iov_cnt);
 696     res->iov = NULL;
 697     res->iov_cnt = 0;
 698     g_free(res->addrs);
 699     res->addrs = NULL;
 700 }
 701
 702 static void
 703 virtio_gpu_resource_attach_backing(VirtIOGPU *g,
 704                                    struct virtio_gpu_ctrl_command *cmd)
 705 {
 706     struct virtio_gpu_simple_resource *res;
 707     struct virtio_gpu_resource_attach_backing ab;
 708     int ret;
 709
 710     VIRTIO_GPU_FILL_CMD(ab);
 711     virtio_gpu_bswap_32(&ab, sizeof(ab));
 712     trace_virtio_gpu_cmd_res_back_attach(ab.resource_id);
 713
 714     res = virtio_gpu_find_resource(g, ab.resource_id);
 715     if (!res) {
 716         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 717                       __func__, ab.resource_id);
 718         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 719         return;
 720     }
 721
 722     if (res->iov) {
 723         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 724         return;
 725     }
 726
 727     ret = virtio_gpu_create_mapping_iov(g, &ab, cmd, &res->addrs, &res->iov);
 728     if (ret != 0) {
 729         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 730         return;
 731     }
 732
 733     res->iov_cnt = ab.nr_entries;
 734 }
 735
 736 static void
 737 virtio_gpu_resource_detach_backing(VirtIOGPU *g,
 738                                    struct virtio_gpu_ctrl_command *cmd)
 739 {
 740     struct virtio_gpu_simple_resource *res;
 741     struct virtio_gpu_resource_detach_backing detach;
 742
 743     VIRTIO_GPU_FILL_CMD(detach);
 744     virtio_gpu_bswap_32(&detach, sizeof(detach));
 745     trace_virtio_gpu_cmd_res_back_detach(detach.resource_id);
 746
 747     res = virtio_gpu_find_resource(g, detach.resource_id);
 748     if (!res || !res->iov) {
 749         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
 750                       __func__, detach.resource_id);
 751         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 752         return;
 753     }
 754     virtio_gpu_cleanup_mapping(g, res);
 755 }
 756
 757 static void virtio_gpu_simple_process_cmd(VirtIOGPU *g,
 758                                           struct virtio_gpu_ctrl_command *cmd)
 759 {
 760     VIRTIO_GPU_FILL_CMD(cmd->cmd_hdr);
 761     virtio_gpu_ctrl_hdr_bswap(&cmd->cmd_hdr);
 762
 763     switch (cmd->cmd_hdr.type) {
 764     case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
 765         virtio_gpu_get_display_info(g, cmd);
 766         break;
 767     case VIRTIO_GPU_CMD_GET_EDID:
 768         virtio_gpu_get_edid(g, cmd);
 769         break;
 770     case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
 771         virtio_gpu_resource_create_2d(g, cmd);
 772         break;
 773     case VIRTIO_GPU_CMD_RESOURCE_UNREF:
 774         virtio_gpu_resource_unref(g, cmd);
 775         break;
 776     case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
 777         virtio_gpu_resource_flush(g, cmd);
 778         break;
 779     case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
 780         virtio_gpu_transfer_to_host_2d(g, cmd);
 781         break;
 782     case VIRTIO_GPU_CMD_SET_SCANOUT:
 783         virtio_gpu_set_scanout(g, cmd);
 784         break;
 785     case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
 786         virtio_gpu_resource_attach_backing(g, cmd);
 787         break;
 788     case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
 789         virtio_gpu_resource_detach_backing(g, cmd);
 790         break;
 791     default:
 792         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 793         break;
 794     }
 795     if (!cmd->finished) {
 796         virtio_gpu_ctrl_response_nodata(g, cmd, cmd->error ? cmd->error :
 797                                         VIRTIO_GPU_RESP_OK_NODATA);
 798     }
 799 }
 800
 801 static void virtio_gpu_handle_ctrl_cb(VirtIODevice *vdev, VirtQueue *vq)
 802 {
 803     VirtIOGPU *g = VIRTIO_GPU(vdev);
 804     qemu_bh_schedule(g->ctrl_bh);
 805 }
 806
 807 static void virtio_gpu_handle_cursor_cb(VirtIODevice *vdev, VirtQueue *vq)
 808 {
 809     VirtIOGPU *g = VIRTIO_GPU(vdev);
 810     qemu_bh_schedule(g->cursor_bh);
 811 }
 812
 813 void virtio_gpu_process_cmdq(VirtIOGPU *g)
 814 {
 815     struct virtio_gpu_ctrl_command *cmd;
 816
 817     while (!QTAILQ_EMPTY(&g->cmdq)) {
 818         cmd = QTAILQ_FIRST(&g->cmdq);
 819
 820         if (g->parent_obj.renderer_blocked) {
 821             break;
 822         }
 823
 824         /* process command */
 825         VIRGL(g, virtio_gpu_virgl_process_cmd, virtio_gpu_simple_process_cmd,
 826               g, cmd);
 827
 828         QTAILQ_REMOVE(&g->cmdq, cmd, next);
 829         if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
 830             g->stats.requests++;
 831         }
 832
 833         if (!cmd->finished) {
 834             QTAILQ_INSERT_TAIL(&g->fenceq, cmd, next);
 835             g->inflight++;
 836             if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
 837                 if (g->stats.max_inflight < g->inflight) {
 838                     g->stats.max_inflight = g->inflight;
 839                 }
 840                 fprintf(stderr, "inflight: %3d (+)\r", g->inflight);
 841             }
 842         } else {
 843             g_free(cmd);
 844         }
 845     }
 846 }
 847
 848 static void virtio_gpu_gl_unblock(VirtIOGPUBase *b)
 849 {
 850     VirtIOGPU *g = VIRTIO_GPU(b);
 851
 852 #ifdef CONFIG_VIRGL
 853     if (g->renderer_reset) {
 854         g->renderer_reset = false;
 855         virtio_gpu_virgl_reset(g);
 856     }
 857 #endif
 858     virtio_gpu_process_cmdq(g);
 859 }
 860
 861 static void virtio_gpu_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
 862 {
 863     VirtIOGPU *g = VIRTIO_GPU(vdev);
 864     struct virtio_gpu_ctrl_command *cmd;
 865
 866     if (!virtio_queue_ready(vq)) {
 867         return;
 868     }
 869
 870 #ifdef CONFIG_VIRGL
 871     if (!g->renderer_inited && g->parent_obj.use_virgl_renderer) {
 872         virtio_gpu_virgl_init(g);
 873         g->renderer_inited = true;
 874     }
 875 #endif
 876
 877     cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
 878     while (cmd) {
 879         cmd->vq = vq;
 880         cmd->error = 0;
 881         cmd->finished = false;
 882         QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
 883         cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
 884     }
 885
 886     virtio_gpu_process_cmdq(g);
 887
 888 #ifdef CONFIG_VIRGL
 889     if (g->parent_obj.use_virgl_renderer) {
 890         virtio_gpu_virgl_fence_poll(g);
 891     }
 892 #endif
 893 }
 894
 895 static void virtio_gpu_ctrl_bh(void *opaque)
 896 {
 897     VirtIOGPU *g = opaque;
 898     virtio_gpu_handle_ctrl(&g->parent_obj.parent_obj, g->ctrl_vq);
 899 }
 900
 901 static void virtio_gpu_handle_cursor(VirtIODevice *vdev, VirtQueue *vq)
 902 {
 903     VirtIOGPU *g = VIRTIO_GPU(vdev);
 904     VirtQueueElement *elem;
 905     size_t s;
 906     struct virtio_gpu_update_cursor cursor_info;
 907
 908     if (!virtio_queue_ready(vq)) {
 909         return;
 910     }
 911     for (;;) {
 912         elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
 913         if (!elem) {
 914             break;
 915         }
 916
 917         s = iov_to_buf(elem->out_sg, elem->out_num, 0,
 918                        &cursor_info, sizeof(cursor_info));
 919         if (s != sizeof(cursor_info)) {
 920             qemu_log_mask(LOG_GUEST_ERROR,
 921                           "%s: cursor size incorrect %zu vs %zu\n",
 922                           __func__, s, sizeof(cursor_info));
 923         } else {
 924             virtio_gpu_bswap_32(&cursor_info, sizeof(cursor_info));
 925             update_cursor(g, &cursor_info);
 926         }
 927         virtqueue_push(vq, elem, 0);
 928         virtio_notify(vdev, vq);
 929         g_free(elem);
 930     }
 931 }
 932
 933 static void virtio_gpu_cursor_bh(void *opaque)
 934 {
 935     VirtIOGPU *g = opaque;
 936     virtio_gpu_handle_cursor(&g->parent_obj.parent_obj, g->cursor_vq);
 937 }
 938
 939 static const VMStateDescription vmstate_virtio_gpu_scanout = {
 940     .name = "virtio-gpu-one-scanout",
 941     .version_id = 1,
 942     .fields = (VMStateField[]) {
 943         VMSTATE_UINT32(resource_id, struct virtio_gpu_scanout),
 944         VMSTATE_UINT32(width, struct virtio_gpu_scanout),
 945         VMSTATE_UINT32(height, struct virtio_gpu_scanout),
 946         VMSTATE_INT32(x, struct virtio_gpu_scanout),
 947         VMSTATE_INT32(y, struct virtio_gpu_scanout),
 948         VMSTATE_UINT32(cursor.resource_id, struct virtio_gpu_scanout),
 949         VMSTATE_UINT32(cursor.hot_x, struct virtio_gpu_scanout),
 950         VMSTATE_UINT32(cursor.hot_y, struct virtio_gpu_scanout),
 951         VMSTATE_UINT32(cursor.pos.x, struct virtio_gpu_scanout),
 952         VMSTATE_UINT32(cursor.pos.y, struct virtio_gpu_scanout),
 953         VMSTATE_END_OF_LIST()
 954     },
 955 };
 956
 957 static const VMStateDescription vmstate_virtio_gpu_scanouts = {
 958     .name = "virtio-gpu-scanouts",
 959     .version_id = 1,
 960     .fields = (VMStateField[]) {
 961         VMSTATE_INT32(parent_obj.enable, struct VirtIOGPU),
 962         VMSTATE_UINT32_EQUAL(parent_obj.conf.max_outputs,
 963                              struct VirtIOGPU, NULL),
 964         VMSTATE_STRUCT_VARRAY_UINT32(parent_obj.scanout, struct VirtIOGPU,
 965                                      parent_obj.conf.max_outputs, 1,
 966                                      vmstate_virtio_gpu_scanout,
 967                                      struct virtio_gpu_scanout),
 968         VMSTATE_END_OF_LIST()
 969     },
 970 };
 971
 972 static int virtio_gpu_save(QEMUFile *f, void *opaque, size_t size,
 973                            const VMStateField *field, JSONWriter *vmdesc)
 974 {
 975     VirtIOGPU *g = opaque;
 976     struct virtio_gpu_simple_resource *res;
 977     int i;
 978
 979     /* in 2d mode we should never find unprocessed commands here */
 980     assert(QTAILQ_EMPTY(&g->cmdq));
 981
 982     QTAILQ_FOREACH(res, &g->reslist, next) {
 983         qemu_put_be32(f, res->resource_id);
 984         qemu_put_be32(f, res->width);
 985         qemu_put_be32(f, res->height);
 986         qemu_put_be32(f, res->format);
 987         qemu_put_be32(f, res->iov_cnt);
 988         for (i = 0; i < res->iov_cnt; i++) {
 989             qemu_put_be64(f, res->addrs[i]);
 990             qemu_put_be32(f, res->iov[i].iov_len);
 991         }
 992         qemu_put_buffer(f, (void *)pixman_image_get_data(res->image),
 993                         pixman_image_get_stride(res->image) * res->height);
 994     }
 995     qemu_put_be32(f, 0); /* end of list */
 996
 997     return vmstate_save_state(f, &vmstate_virtio_gpu_scanouts, g, NULL);
 998 }
 999
1000 static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
1001                            const VMStateField *field)
1002 {
1003     VirtIOGPU *g = opaque;
1004     struct virtio_gpu_simple_resource *res;
1005     struct virtio_gpu_scanout *scanout;
1006     uint32_t resource_id, pformat;
1007     int i;
1008
1009     g->hostmem = 0;
1010
1011     resource_id = qemu_get_be32(f);
1012     while (resource_id != 0) {
1013         res = virtio_gpu_find_resource(g, resource_id);
1014         if (res) {
1015             return -EINVAL;
1016         }
1017
1018         res = g_new0(struct virtio_gpu_simple_resource, 1);
1019         res->resource_id = resource_id;
1020         res->width = qemu_get_be32(f);
1021         res->height = qemu_get_be32(f);
1022         res->format = qemu_get_be32(f);
1023         res->iov_cnt = qemu_get_be32(f);
1024
1025         /* allocate */
1026         pformat = virtio_gpu_get_pixman_format(res->format);
1027         if (!pformat) {
1028             g_free(res);
1029             return -EINVAL;
1030         }
1031         res->image = pixman_image_create_bits(pformat,
1032                                               res->width, res->height,
1033                                               NULL, 0);
1034         if (!res->image) {
1035             g_free(res);
1036             return -EINVAL;
1037         }
1038
1039         res->hostmem = calc_image_hostmem(pformat, res->width, res->height);
1040
1041         res->addrs = g_new(uint64_t, res->iov_cnt);
1042         res->iov = g_new(struct iovec, res->iov_cnt);
1043
1044         /* read data */
1045         for (i = 0; i < res->iov_cnt; i++) {
1046             res->addrs[i] = qemu_get_be64(f);
1047             res->iov[i].iov_len = qemu_get_be32(f);
1048         }
1049         qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
1050                         pixman_image_get_stride(res->image) * res->height);
1051
1052         /* restore mapping */
1053         for (i = 0; i < res->iov_cnt; i++) {
1054             hwaddr len = res->iov[i].iov_len;
1055             res->iov[i].iov_base =
1056                 dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
1057                                res->addrs[i], &len, DMA_DIRECTION_TO_DEVICE);
1058
1059             if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
1060                 /* Clean up the half-a-mapping we just created... */
1061                 if (res->iov[i].iov_base) {
1062                     dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
1063                                      res->iov[i].iov_base,
1064                                      len,
1065                                      DMA_DIRECTION_TO_DEVICE,
1066                                      0);
1067                 }
1068                 /* ...and the mappings for previous loop iterations */
1069                 res->iov_cnt = i;
1070                 virtio_gpu_cleanup_mapping(g, res);
1071                 pixman_image_unref(res->image);
1072                 g_free(res);
1073                 return -EINVAL;
1074             }
1075         }
1076
1077         QTAILQ_INSERT_HEAD(&g->reslist, res, next);
1078         g->hostmem += res->hostmem;
1079
1080         resource_id = qemu_get_be32(f);
1081     }
1082
1083     /* load & apply scanout state */
1084     vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1);
1085     for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
1086         scanout = &g->parent_obj.scanout[i];
1087         if (!scanout->resource_id) {
1088             continue;
1089         }
1090         res = virtio_gpu_find_resource(g, scanout->resource_id);
1091         if (!res) {
1092             return -EINVAL;
1093         }
1094         scanout->ds = qemu_create_displaysurface_pixman(res->image);
1095         if (!scanout->ds) {
1096             return -EINVAL;
1097         }
1098
1099         dpy_gfx_replace_surface(scanout->con, scanout->ds);
1100         dpy_gfx_update_full(scanout->con);
1101         if (scanout->cursor.resource_id) {
1102             update_cursor(g, &scanout->cursor);
1103         }
1104         res->scanout_bitmask |= (1 << i);
1105     }
1106
1107     return 0;
1108 }
1109
1110 static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
1111 {
1112     VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
1113     VirtIOGPU *g = VIRTIO_GPU(qdev);
1114     bool have_virgl;
1115
1116 #if !defined(CONFIG_VIRGL) || defined(HOST_WORDS_BIGENDIAN)
1117     have_virgl = false;
1118 #else
1119     have_virgl = display_opengl;
1120 #endif
1121     if (!have_virgl) {
1122         g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
1123     } else {
1124 #if defined(CONFIG_VIRGL)
1125         VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
1126             virtio_gpu_virgl_get_num_capsets(g);
1127 #endif
1128     }
1129
1130     if (!virtio_gpu_base_device_realize(qdev,
1131                                         virtio_gpu_handle_ctrl_cb,
1132                                         virtio_gpu_handle_cursor_cb,
1133                                         errp)) {
1134         return;
1135     }
1136
1137     g->ctrl_vq = virtio_get_queue(vdev, 0);
1138     g->cursor_vq = virtio_get_queue(vdev, 1);
1139     g->ctrl_bh = qemu_bh_new(virtio_gpu_ctrl_bh, g);
1140     g->cursor_bh = qemu_bh_new(virtio_gpu_cursor_bh, g);
1141     QTAILQ_INIT(&g->reslist);
1142     QTAILQ_INIT(&g->cmdq);
1143     QTAILQ_INIT(&g->fenceq);
1144 }
1145
1146 static void virtio_gpu_reset(VirtIODevice *vdev)
1147 {
1148     VirtIOGPU *g = VIRTIO_GPU(vdev);
1149     struct virtio_gpu_simple_resource *res, *tmp;
1150     struct virtio_gpu_ctrl_command *cmd;
1151
1152 #ifdef CONFIG_VIRGL
1153     if (g->parent_obj.use_virgl_renderer) {
1154         virtio_gpu_virgl_reset(g);
1155     }
1156 #endif
1157
1158     QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) {
1159         virtio_gpu_resource_destroy(g, res);
1160     }
1161
1162     while (!QTAILQ_EMPTY(&g->cmdq)) {
1163         cmd = QTAILQ_FIRST(&g->cmdq);
1164         QTAILQ_REMOVE(&g->cmdq, cmd, next);
1165         g_free(cmd);
1166     }
1167
1168     while (!QTAILQ_EMPTY(&g->fenceq)) {
1169         cmd = QTAILQ_FIRST(&g->fenceq);
1170         QTAILQ_REMOVE(&g->fenceq, cmd, next);
1171         g->inflight--;
1172         g_free(cmd);
1173     }
1174
1175 #ifdef CONFIG_VIRGL
1176     if (g->parent_obj.use_virgl_renderer) {
1177         if (g->parent_obj.renderer_blocked) {
1178             g->renderer_reset = true;
1179         } else {
1180             virtio_gpu_virgl_reset(g);
1181         }
1182         g->parent_obj.use_virgl_renderer = false;
1183     }
1184 #endif
1185
1186     virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
1187 }
1188
1189 static void
1190 virtio_gpu_get_config(VirtIODevice *vdev, uint8_t *config)
1191 {
1192     VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
1193
1194     memcpy(config, &g->virtio_config, sizeof(g->virtio_config));
1195 }
1196
1197 static void
1198 virtio_gpu_set_config(VirtIODevice *vdev, const uint8_t *config)
1199 {
1200     VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
1201     const struct virtio_gpu_config *vgconfig =
1202         (const struct virtio_gpu_config *)config;
1203
1204     if (vgconfig->events_clear) {
1205         g->virtio_config.events_read &= ~vgconfig->events_clear;
1206     }
1207 }
1208
1209 /*
1210  * For historical reasons virtio_gpu does not adhere to virtio migration
1211  * scheme as described in doc/virtio-migration.txt, in a sense that no
1212  * save/load callback are provided to the core. Instead the device data
1213  * is saved/loaded after the core data.
1214  *
1215  * Because of this we need a special vmsd.
1216  */
1217 static const VMStateDescription vmstate_virtio_gpu = {
1218     .name = "virtio-gpu",
1219     .minimum_version_id = VIRTIO_GPU_VM_VERSION,
1220     .version_id = VIRTIO_GPU_VM_VERSION,
1221     .fields = (VMStateField[]) {
1222         VMSTATE_VIRTIO_DEVICE /* core */,
1223         {
1224             .name = "virtio-gpu",
1225             .info = &(const VMStateInfo) {
1226                         .name = "virtio-gpu",
1227                         .get = virtio_gpu_load,
1228                         .put = virtio_gpu_save,
1229             },
1230             .flags = VMS_SINGLE,
1231         } /* device */,
1232         VMSTATE_END_OF_LIST()
1233     },
1234 };
1235
1236 static Property virtio_gpu_properties[] = {
1237     VIRTIO_GPU_BASE_PROPERTIES(VirtIOGPU, parent_obj.conf),
1238     DEFINE_PROP_SIZE("max_hostmem", VirtIOGPU, conf_max_hostmem,
1239                      256 * MiB),
1240 #ifdef CONFIG_VIRGL
1241     DEFINE_PROP_BIT("virgl", VirtIOGPU, parent_obj.conf.flags,
1242                     VIRTIO_GPU_FLAG_VIRGL_ENABLED, true),
1243     DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
1244                     VIRTIO_GPU_FLAG_STATS_ENABLED, false),
1245 #endif
1246     DEFINE_PROP_END_OF_LIST(),
1247 };
1248
1249 static void virtio_gpu_class_init(ObjectClass *klass, void *data)
1250 {
1251     DeviceClass *dc = DEVICE_CLASS(klass);
1252     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1253     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
1254
1255     vgc->gl_unblock = virtio_gpu_gl_unblock;
1256     vdc->realize = virtio_gpu_device_realize;
1257     vdc->reset = virtio_gpu_reset;
1258     vdc->get_config = virtio_gpu_get_config;
1259     vdc->set_config = virtio_gpu_set_config;
1260
1261     dc->vmsd = &vmstate_virtio_gpu;
1262     device_class_set_props(dc, virtio_gpu_properties);
1263 }
1264
1265 static const TypeInfo virtio_gpu_info = {
1266     .name = TYPE_VIRTIO_GPU,
1267     .parent = TYPE_VIRTIO_GPU_BASE,
1268     .instance_size = sizeof(VirtIOGPU),
1269     .class_init = virtio_gpu_class_init,
1270 };
1271
1272 static void virtio_register_types(void)
1273 {
1274     type_register_static(&virtio_gpu_info);
1275 }
1276
1277 type_init(virtio_register_types)