contrib/vhost-user-gpu/virgl.c

   1 /*
   2  * Virtio vhost-user GPU Device
   3  *
   4  * Copyright Red Hat, Inc. 2013-2018
   5  *
   6  * Authors:
   7  *     Dave Airlie <airlied@redhat.com>
   8  *     Gerd Hoffmann <kraxel@redhat.com>
   9  *     Marc-André Lureau <marcandre.lureau@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include <virglrenderer.h>
  17 #include "virgl.h"
  18
  19 #include <epoxy/gl.h>
  20
  21 void
  22 vg_virgl_update_cursor_data(VuGpu *g, uint32_t resource_id,
  23                             gpointer data)
  24 {
  25     uint32_t width, height;
  26     uint32_t *cursor;
  27
  28     cursor = virgl_renderer_get_cursor_data(resource_id, &width, &height);
  29     g_return_if_fail(cursor != NULL);
  30     g_return_if_fail(width == 64);
  31     g_return_if_fail(height == 64);
  32
  33     memcpy(data, cursor, 64 * 64 * sizeof(uint32_t));
  34     free(cursor);
  35 }
  36
  37 static void
  38 virgl_cmd_context_create(VuGpu *g,
  39                          struct virtio_gpu_ctrl_command *cmd)
  40 {
  41     struct virtio_gpu_ctx_create cc;
  42
  43     VUGPU_FILL_CMD(cc);
  44
  45     virgl_renderer_context_create(cc.hdr.ctx_id, cc.nlen,
  46                                   cc.debug_name);
  47 }
  48
  49 static void
  50 virgl_cmd_context_destroy(VuGpu *g,
  51                           struct virtio_gpu_ctrl_command *cmd)
  52 {
  53     struct virtio_gpu_ctx_destroy cd;
  54
  55     VUGPU_FILL_CMD(cd);
  56
  57     virgl_renderer_context_destroy(cd.hdr.ctx_id);
  58 }
  59
  60 static void
  61 virgl_cmd_create_resource_2d(VuGpu *g,
  62                              struct virtio_gpu_ctrl_command *cmd)
  63 {
  64     struct virtio_gpu_resource_create_2d c2d;
  65     struct virgl_renderer_resource_create_args args;
  66
  67     VUGPU_FILL_CMD(c2d);
  68
  69     args.handle = c2d.resource_id;
  70     args.target = 2;
  71     args.format = c2d.format;
  72     args.bind = (1 << 1);
  73     args.width = c2d.width;
  74     args.height = c2d.height;
  75     args.depth = 1;
  76     args.array_size = 1;
  77     args.last_level = 0;
  78     args.nr_samples = 0;
  79     args.flags = VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP;
  80     virgl_renderer_resource_create(&args, NULL, 0);
  81 }
  82
  83 static void
  84 virgl_cmd_create_resource_3d(VuGpu *g,
  85                              struct virtio_gpu_ctrl_command *cmd)
  86 {
  87     struct virtio_gpu_resource_create_3d c3d;
  88     struct virgl_renderer_resource_create_args args;
  89
  90     VUGPU_FILL_CMD(c3d);
  91
  92     args.handle = c3d.resource_id;
  93     args.target = c3d.target;
  94     args.format = c3d.format;
  95     args.bind = c3d.bind;
  96     args.width = c3d.width;
  97     args.height = c3d.height;
  98     args.depth = c3d.depth;
  99     args.array_size = c3d.array_size;
 100     args.last_level = c3d.last_level;
 101     args.nr_samples = c3d.nr_samples;
 102     args.flags = c3d.flags;
 103     virgl_renderer_resource_create(&args, NULL, 0);
 104 }
 105
 106 static void
 107 virgl_cmd_resource_unref(VuGpu *g,
 108                          struct virtio_gpu_ctrl_command *cmd)
 109 {
 110     struct virtio_gpu_resource_unref unref;
 111     struct iovec *res_iovs = NULL;
 112     int num_iovs = 0;
 113
 114     VUGPU_FILL_CMD(unref);
 115
 116     virgl_renderer_resource_detach_iov(unref.resource_id,
 117                                        &res_iovs,
 118                                        &num_iovs);
 119     if (res_iovs != NULL && num_iovs != 0) {
 120         vg_cleanup_mapping_iov(g, res_iovs, num_iovs);
 121     }
 122     virgl_renderer_resource_unref(unref.resource_id);
 123 }
 124
 125 /* Not yet(?) defined in standard-headers, remove when possible */
 126 #ifndef VIRTIO_GPU_CAPSET_VIRGL2
 127 #define VIRTIO_GPU_CAPSET_VIRGL2 2
 128 #endif
 129
 130 static void
 131 virgl_cmd_get_capset_info(VuGpu *g,
 132                           struct virtio_gpu_ctrl_command *cmd)
 133 {
 134     struct virtio_gpu_get_capset_info info;
 135     struct virtio_gpu_resp_capset_info resp;
 136
 137     VUGPU_FILL_CMD(info);
 138
 139     memset(&resp, 0, sizeof(resp));
 140     if (info.capset_index == 0) {
 141         resp.capset_id = VIRTIO_GPU_CAPSET_VIRGL;
 142         virgl_renderer_get_cap_set(resp.capset_id,
 143                                    &resp.capset_max_version,
 144                                    &resp.capset_max_size);
 145     } else if (info.capset_index == 1) {
 146         resp.capset_id = VIRTIO_GPU_CAPSET_VIRGL2;
 147         virgl_renderer_get_cap_set(resp.capset_id,
 148                                    &resp.capset_max_version,
 149                                    &resp.capset_max_size);
 150     } else {
 151         resp.capset_max_version = 0;
 152         resp.capset_max_size = 0;
 153     }
 154     resp.hdr.type = VIRTIO_GPU_RESP_OK_CAPSET_INFO;
 155     vg_ctrl_response(g, cmd, &resp.hdr, sizeof(resp));
 156 }
 157
 158 uint32_t
 159 vg_virgl_get_num_capsets(void)
 160 {
 161     uint32_t capset2_max_ver, capset2_max_size;
 162     virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VIRGL2,
 163                                &capset2_max_ver,
 164                                &capset2_max_size);
 165
 166     return capset2_max_ver ? 2 : 1;
 167 }
 168
 169 static void
 170 virgl_cmd_get_capset(VuGpu *g,
 171                      struct virtio_gpu_ctrl_command *cmd)
 172 {
 173     struct virtio_gpu_get_capset gc;
 174     struct virtio_gpu_resp_capset *resp;
 175     uint32_t max_ver, max_size;
 176
 177     VUGPU_FILL_CMD(gc);
 178
 179     virgl_renderer_get_cap_set(gc.capset_id, &max_ver,
 180                                &max_size);
 181     if (!max_size) {
 182         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 183         return;
 184     }
 185     resp = g_malloc0(sizeof(*resp) + max_size);
 186
 187     resp->hdr.type = VIRTIO_GPU_RESP_OK_CAPSET;
 188     virgl_renderer_fill_caps(gc.capset_id,
 189                              gc.capset_version,
 190                              (void *)resp->capset_data);
 191     vg_ctrl_response(g, cmd, &resp->hdr, sizeof(*resp) + max_size);
 192     g_free(resp);
 193 }
 194
 195 static void
 196 virgl_cmd_submit_3d(VuGpu *g,
 197                     struct virtio_gpu_ctrl_command *cmd)
 198 {
 199     struct virtio_gpu_cmd_submit cs;
 200     void *buf;
 201     size_t s;
 202
 203     VUGPU_FILL_CMD(cs);
 204
 205     buf = g_malloc(cs.size);
 206     s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
 207                    sizeof(cs), buf, cs.size);
 208     if (s != cs.size) {
 209         g_critical("%s: size mismatch (%zd/%d)", __func__, s, cs.size);
 210         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
 211         goto out;
 212     }
 213
 214     virgl_renderer_submit_cmd(buf, cs.hdr.ctx_id, cs.size / 4);
 215
 216 out:
 217     g_free(buf);
 218 }
 219
 220 static void
 221 virgl_cmd_transfer_to_host_2d(VuGpu *g,
 222                               struct virtio_gpu_ctrl_command *cmd)
 223 {
 224     struct virtio_gpu_transfer_to_host_2d t2d;
 225     struct virtio_gpu_box box;
 226
 227     VUGPU_FILL_CMD(t2d);
 228
 229     box.x = t2d.r.x;
 230     box.y = t2d.r.y;
 231     box.z = 0;
 232     box.w = t2d.r.width;
 233     box.h = t2d.r.height;
 234     box.d = 1;
 235
 236     virgl_renderer_transfer_write_iov(t2d.resource_id,
 237                                       0,
 238                                       0,
 239                                       0,
 240                                       0,
 241                                       (struct virgl_box *)&box,
 242                                       t2d.offset, NULL, 0);
 243 }
 244
 245 static void
 246 virgl_cmd_transfer_to_host_3d(VuGpu *g,
 247                               struct virtio_gpu_ctrl_command *cmd)
 248 {
 249     struct virtio_gpu_transfer_host_3d t3d;
 250
 251     VUGPU_FILL_CMD(t3d);
 252
 253     virgl_renderer_transfer_write_iov(t3d.resource_id,
 254                                       t3d.hdr.ctx_id,
 255                                       t3d.level,
 256                                       t3d.stride,
 257                                       t3d.layer_stride,
 258                                       (struct virgl_box *)&t3d.box,
 259                                       t3d.offset, NULL, 0);
 260 }
 261
 262 static void
 263 virgl_cmd_transfer_from_host_3d(VuGpu *g,
 264                                 struct virtio_gpu_ctrl_command *cmd)
 265 {
 266     struct virtio_gpu_transfer_host_3d tf3d;
 267
 268     VUGPU_FILL_CMD(tf3d);
 269
 270     virgl_renderer_transfer_read_iov(tf3d.resource_id,
 271                                      tf3d.hdr.ctx_id,
 272                                      tf3d.level,
 273                                      tf3d.stride,
 274                                      tf3d.layer_stride,
 275                                      (struct virgl_box *)&tf3d.box,
 276                                      tf3d.offset, NULL, 0);
 277 }
 278
 279 static void
 280 virgl_resource_attach_backing(VuGpu *g,
 281                               struct virtio_gpu_ctrl_command *cmd)
 282 {
 283     struct virtio_gpu_resource_attach_backing att_rb;
 284     struct iovec *res_iovs;
 285     int ret;
 286
 287     VUGPU_FILL_CMD(att_rb);
 288
 289     ret = vg_create_mapping_iov(g, &att_rb, cmd, &res_iovs);
 290     if (ret != 0) {
 291         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 292         return;
 293     }
 294
 295     ret = virgl_renderer_resource_attach_iov(att_rb.resource_id,
 296                                        res_iovs, att_rb.nr_entries);
 297     if (ret != 0) {
 298         vg_cleanup_mapping_iov(g, res_iovs, att_rb.nr_entries);
 299     }
 300 }
 301
 302 static void
 303 virgl_resource_detach_backing(VuGpu *g,
 304                               struct virtio_gpu_ctrl_command *cmd)
 305 {
 306     struct virtio_gpu_resource_detach_backing detach_rb;
 307     struct iovec *res_iovs = NULL;
 308     int num_iovs = 0;
 309
 310     VUGPU_FILL_CMD(detach_rb);
 311
 312     virgl_renderer_resource_detach_iov(detach_rb.resource_id,
 313                                        &res_iovs,
 314                                        &num_iovs);
 315     if (res_iovs == NULL || num_iovs == 0) {
 316         return;
 317     }
 318     vg_cleanup_mapping_iov(g, res_iovs, num_iovs);
 319 }
 320
 321 static void
 322 virgl_cmd_set_scanout(VuGpu *g,
 323                       struct virtio_gpu_ctrl_command *cmd)
 324 {
 325     struct virtio_gpu_set_scanout ss;
 326     struct virgl_renderer_resource_info info;
 327     int ret;
 328
 329     VUGPU_FILL_CMD(ss);
 330
 331     if (ss.scanout_id >= VIRTIO_GPU_MAX_SCANOUTS) {
 332         g_critical("%s: illegal scanout id specified %d",
 333                    __func__, ss.scanout_id);
 334         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
 335         return;
 336     }
 337
 338     memset(&info, 0, sizeof(info));
 339
 340     if (ss.resource_id && ss.r.width && ss.r.height) {
 341         ret = virgl_renderer_resource_get_info(ss.resource_id, &info);
 342         if (ret == -1) {
 343             g_critical("%s: illegal resource specified %d\n",
 344                        __func__, ss.resource_id);
 345             cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 346             return;
 347         }
 348
 349         int fd = -1;
 350         if (virgl_renderer_get_fd_for_texture(info.tex_id, &fd) < 0) {
 351             g_critical("%s: failed to get fd for texture\n", __func__);
 352             cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
 353             return;
 354         }
 355         assert(fd >= 0);
 356         VhostUserGpuMsg msg = {
 357             .request = VHOST_USER_GPU_DMABUF_SCANOUT,
 358             .size = sizeof(VhostUserGpuDMABUFScanout),
 359             .payload.dmabuf_scanout.scanout_id = ss.scanout_id,
 360             .payload.dmabuf_scanout.x =  ss.r.x,
 361             .payload.dmabuf_scanout.y =  ss.r.y,
 362             .payload.dmabuf_scanout.width = ss.r.width,
 363             .payload.dmabuf_scanout.height = ss.r.height,
 364             .payload.dmabuf_scanout.fd_width = info.width,
 365             .payload.dmabuf_scanout.fd_height = info.height,
 366             .payload.dmabuf_scanout.fd_stride = info.stride,
 367             .payload.dmabuf_scanout.fd_flags = info.flags,
 368             .payload.dmabuf_scanout.fd_drm_fourcc = info.drm_fourcc
 369         };
 370         vg_send_msg(g, &msg, fd);
 371         close(fd);
 372     } else {
 373         VhostUserGpuMsg msg = {
 374             .request = VHOST_USER_GPU_DMABUF_SCANOUT,
 375             .size = sizeof(VhostUserGpuDMABUFScanout),
 376             .payload.dmabuf_scanout.scanout_id = ss.scanout_id,
 377         };
 378         g_debug("disable scanout");
 379         vg_send_msg(g, &msg, -1);
 380     }
 381     g->scanout[ss.scanout_id].resource_id = ss.resource_id;
 382 }
 383
 384 static void
 385 virgl_cmd_resource_flush(VuGpu *g,
 386                          struct virtio_gpu_ctrl_command *cmd)
 387 {
 388     struct virtio_gpu_resource_flush rf;
 389     int i;
 390
 391     VUGPU_FILL_CMD(rf);
 392
 393     glFlush();
 394     if (!rf.resource_id) {
 395         g_debug("bad resource id for flush..?");
 396         return;
 397     }
 398     for (i = 0; i < VIRTIO_GPU_MAX_SCANOUTS; i++) {
 399         if (g->scanout[i].resource_id != rf.resource_id) {
 400             continue;
 401         }
 402         VhostUserGpuMsg msg = {
 403             .request = VHOST_USER_GPU_DMABUF_UPDATE,
 404             .size = sizeof(VhostUserGpuUpdate),
 405             .payload.update.scanout_id = i,
 406             .payload.update.x = rf.r.x,
 407             .payload.update.y = rf.r.y,
 408             .payload.update.width = rf.r.width,
 409             .payload.update.height = rf.r.height
 410         };
 411         vg_send_msg(g, &msg, -1);
 412         vg_wait_ok(g);
 413     }
 414 }
 415
 416 static void
 417 virgl_cmd_ctx_attach_resource(VuGpu *g,
 418                               struct virtio_gpu_ctrl_command *cmd)
 419 {
 420     struct virtio_gpu_ctx_resource att_res;
 421
 422     VUGPU_FILL_CMD(att_res);
 423
 424     virgl_renderer_ctx_attach_resource(att_res.hdr.ctx_id, att_res.resource_id);
 425 }
 426
 427 static void
 428 virgl_cmd_ctx_detach_resource(VuGpu *g,
 429                               struct virtio_gpu_ctrl_command *cmd)
 430 {
 431     struct virtio_gpu_ctx_resource det_res;
 432
 433     VUGPU_FILL_CMD(det_res);
 434
 435     virgl_renderer_ctx_detach_resource(det_res.hdr.ctx_id, det_res.resource_id);
 436 }
 437
 438 void vg_virgl_process_cmd(VuGpu *g, struct virtio_gpu_ctrl_command *cmd)
 439 {
 440     virgl_renderer_force_ctx_0();
 441     switch (cmd->cmd_hdr.type) {
 442     case VIRTIO_GPU_CMD_CTX_CREATE:
 443         virgl_cmd_context_create(g, cmd);
 444         break;
 445     case VIRTIO_GPU_CMD_CTX_DESTROY:
 446         virgl_cmd_context_destroy(g, cmd);
 447         break;
 448     case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
 449         virgl_cmd_create_resource_2d(g, cmd);
 450         break;
 451     case VIRTIO_GPU_CMD_RESOURCE_CREATE_3D:
 452         virgl_cmd_create_resource_3d(g, cmd);
 453         break;
 454     case VIRTIO_GPU_CMD_SUBMIT_3D:
 455         virgl_cmd_submit_3d(g, cmd);
 456         break;
 457     case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
 458         virgl_cmd_transfer_to_host_2d(g, cmd);
 459         break;
 460     case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D:
 461         virgl_cmd_transfer_to_host_3d(g, cmd);
 462         break;
 463     case VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D:
 464         virgl_cmd_transfer_from_host_3d(g, cmd);
 465         break;
 466     case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
 467         virgl_resource_attach_backing(g, cmd);
 468         break;
 469     case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
 470         virgl_resource_detach_backing(g, cmd);
 471         break;
 472     case VIRTIO_GPU_CMD_SET_SCANOUT:
 473         virgl_cmd_set_scanout(g, cmd);
 474         break;
 475     case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
 476         virgl_cmd_resource_flush(g, cmd);
 477         break;
 478     case VIRTIO_GPU_CMD_RESOURCE_UNREF:
 479         virgl_cmd_resource_unref(g, cmd);
 480         break;
 481     case VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE:
 482         /* TODO add security */
 483         virgl_cmd_ctx_attach_resource(g, cmd);
 484         break;
 485     case VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE:
 486         /* TODO add security */
 487         virgl_cmd_ctx_detach_resource(g, cmd);
 488         break;
 489     case VIRTIO_GPU_CMD_GET_CAPSET_INFO:
 490         virgl_cmd_get_capset_info(g, cmd);
 491         break;
 492     case VIRTIO_GPU_CMD_GET_CAPSET:
 493         virgl_cmd_get_capset(g, cmd);
 494         break;
 495     case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
 496         vg_get_display_info(g, cmd);
 497         break;
 498     case VIRTIO_GPU_CMD_GET_EDID:
 499         vg_get_edid(g, cmd);
 500         break;
 501     default:
 502         g_debug("TODO handle ctrl %x\n", cmd->cmd_hdr.type);
 503         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
 504         break;
 505     }
 506
 507     if (cmd->state != VG_CMD_STATE_NEW) {
 508         return;
 509     }
 510
 511     if (cmd->error) {
 512         g_warning("%s: ctrl 0x%x, error 0x%x\n", __func__,
 513                   cmd->cmd_hdr.type, cmd->error);
 514         vg_ctrl_response_nodata(g, cmd, cmd->error);
 515         return;
 516     }
 517
 518     if (!(cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE)) {
 519         vg_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA);
 520         return;
 521     }
 522
 523     g_debug("Creating fence id:%" PRId64 " type:%d",
 524             cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type);
 525     virgl_renderer_create_fence(cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type);
 526 }
 527
 528 static void
 529 virgl_write_fence(void *opaque, uint32_t fence)
 530 {
 531     VuGpu *g = opaque;
 532     struct virtio_gpu_ctrl_command *cmd, *tmp;
 533
 534     QTAILQ_FOREACH_SAFE(cmd, &g->fenceq, next, tmp) {
 535         /*
 536          * the guest can end up emitting fences out of order
 537          * so we should check all fenced cmds not just the first one.
 538          */
 539         if (cmd->cmd_hdr.fence_id > fence) {
 540             continue;
 541         }
 542         g_debug("FENCE %" PRIu64, cmd->cmd_hdr.fence_id);
 543         vg_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA);
 544         QTAILQ_REMOVE(&g->fenceq, cmd, next);
 545         free(cmd);
 546         g->inflight--;
 547     }
 548 }
 549
 550 #if defined(VIRGL_RENDERER_CALLBACKS_VERSION) && \
 551     VIRGL_RENDERER_CALLBACKS_VERSION >= 2
 552 static int
 553 virgl_get_drm_fd(void *opaque)
 554 {
 555     VuGpu *g = opaque;
 556
 557     return g->drm_rnode_fd;
 558 }
 559 #endif
 560
 561 static struct virgl_renderer_callbacks virgl_cbs = {
 562 #if defined(VIRGL_RENDERER_CALLBACKS_VERSION) &&    \
 563     VIRGL_RENDERER_CALLBACKS_VERSION >= 2
 564     .get_drm_fd  = virgl_get_drm_fd,
 565     .version     = 2,
 566 #else
 567     .version     = 1,
 568 #endif
 569     .write_fence = virgl_write_fence,
 570 };
 571
 572 static void
 573 vg_virgl_poll(VuDev *dev, int condition, void *data)
 574 {
 575     virgl_renderer_poll();
 576 }
 577
 578 bool
 579 vg_virgl_init(VuGpu *g)
 580 {
 581     int ret;
 582
 583     if (g->drm_rnode_fd && virgl_cbs.version == 1) {
 584         g_warning("virgl will use the default rendernode");
 585     }
 586
 587     ret = virgl_renderer_init(g,
 588                               VIRGL_RENDERER_USE_EGL |
 589                               VIRGL_RENDERER_THREAD_SYNC,
 590                               &virgl_cbs);
 591     if (ret != 0) {
 592         return false;
 593     }
 594
 595     ret = virgl_renderer_get_poll_fd();
 596     if (ret != -1) {
 597         g->renderer_source =
 598             vug_source_new(&g->dev, ret, G_IO_IN, vg_virgl_poll, g);
 599     }
 600
 601     return true;
 602 }