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 int 322 virgl_get_resource_info_modifiers(uint32_t resource_id, 323 struct virgl_renderer_resource_info *info, 324 uint64_t *modifiers) 325 { 326 int ret; 327 #ifdef VIRGL_RENDERER_RESOURCE_INFO_EXT_VERSION 328 struct virgl_renderer_resource_info_ext info_ext; 329 ret = virgl_renderer_resource_get_info_ext(resource_id, &info_ext); 330 if (ret < 0) { 331 return ret; 332 } 333 334 *info = info_ext.base; 335 *modifiers = info_ext.modifiers; 336 #else 337 ret = virgl_renderer_resource_get_info(resource_id, info); 338 if (ret < 0) { 339 return ret; 340 } 341 342 /* 343 * Before virgl_renderer_resource_get_info_ext, 344 * getting the modifiers was not possible. 345 */ 346 *modifiers = 0; 347 #endif 348 349 return 0; 350 } 351 352 static void 353 virgl_cmd_set_scanout(VuGpu *g, 354 struct virtio_gpu_ctrl_command *cmd) 355 { 356 struct virtio_gpu_set_scanout ss; 357 struct virgl_renderer_resource_info info; 358 int ret; 359 360 VUGPU_FILL_CMD(ss); 361 362 if (ss.scanout_id >= VIRTIO_GPU_MAX_SCANOUTS) { 363 g_critical("%s: illegal scanout id specified %d", 364 __func__, ss.scanout_id); 365 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID; 366 return; 367 } 368 369 memset(&info, 0, sizeof(info)); 370 371 if (ss.resource_id && ss.r.width && ss.r.height) { 372 uint64_t modifiers = 0; 373 ret = virgl_get_resource_info_modifiers(ss.resource_id, &info, 374 &modifiers); 375 if (ret == -1) { 376 g_critical("%s: illegal resource specified %d\n", 377 __func__, ss.resource_id); 378 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID; 379 return; 380 } 381 382 int fd = -1; 383 if (virgl_renderer_get_fd_for_texture(info.tex_id, &fd) < 0) { 384 g_critical("%s: failed to get fd for texture\n", __func__); 385 cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID; 386 return; 387 } 388 assert(fd >= 0); 389 VhostUserGpuMsg msg = { 390 .payload.dmabuf_scanout.scanout_id = ss.scanout_id, 391 .payload.dmabuf_scanout.x = ss.r.x, 392 .payload.dmabuf_scanout.y = ss.r.y, 393 .payload.dmabuf_scanout.width = ss.r.width, 394 .payload.dmabuf_scanout.height = ss.r.height, 395 .payload.dmabuf_scanout.fd_width = info.width, 396 .payload.dmabuf_scanout.fd_height = info.height, 397 .payload.dmabuf_scanout.fd_stride = info.stride, 398 .payload.dmabuf_scanout.fd_flags = info.flags, 399 .payload.dmabuf_scanout.fd_drm_fourcc = info.drm_fourcc 400 }; 401 402 if (g->use_modifiers) { 403 /* 404 * The mesage uses all the fields set in dmabuf_scanout plus 405 * modifiers which is appended after VhostUserGpuDMABUFScanout. 406 */ 407 msg.request = VHOST_USER_GPU_DMABUF_SCANOUT2; 408 msg.size = sizeof(VhostUserGpuDMABUFScanout2); 409 msg.payload.dmabuf_scanout2.modifier = modifiers; 410 } else { 411 msg.request = VHOST_USER_GPU_DMABUF_SCANOUT; 412 msg.size = sizeof(VhostUserGpuDMABUFScanout); 413 } 414 415 vg_send_msg(g, &msg, fd); 416 close(fd); 417 } else { 418 VhostUserGpuMsg msg = { 419 .request = VHOST_USER_GPU_DMABUF_SCANOUT, 420 .size = sizeof(VhostUserGpuDMABUFScanout), 421 .payload.dmabuf_scanout.scanout_id = ss.scanout_id, 422 }; 423 g_debug("disable scanout"); 424 vg_send_msg(g, &msg, -1); 425 } 426 g->scanout[ss.scanout_id].resource_id = ss.resource_id; 427 } 428 429 static void 430 virgl_cmd_resource_flush(VuGpu *g, 431 struct virtio_gpu_ctrl_command *cmd) 432 { 433 struct virtio_gpu_resource_flush rf; 434 int i; 435 436 VUGPU_FILL_CMD(rf); 437 438 glFlush(); 439 if (!rf.resource_id) { 440 g_debug("bad resource id for flush..?"); 441 return; 442 } 443 for (i = 0; i < VIRTIO_GPU_MAX_SCANOUTS; i++) { 444 if (g->scanout[i].resource_id != rf.resource_id) { 445 continue; 446 } 447 VhostUserGpuMsg msg = { 448 .request = VHOST_USER_GPU_DMABUF_UPDATE, 449 .size = sizeof(VhostUserGpuUpdate), 450 .payload.update.scanout_id = i, 451 .payload.update.x = rf.r.x, 452 .payload.update.y = rf.r.y, 453 .payload.update.width = rf.r.width, 454 .payload.update.height = rf.r.height 455 }; 456 vg_send_msg(g, &msg, -1); 457 vg_wait_ok(g); 458 } 459 } 460 461 static void 462 virgl_cmd_ctx_attach_resource(VuGpu *g, 463 struct virtio_gpu_ctrl_command *cmd) 464 { 465 struct virtio_gpu_ctx_resource att_res; 466 467 VUGPU_FILL_CMD(att_res); 468 469 virgl_renderer_ctx_attach_resource(att_res.hdr.ctx_id, att_res.resource_id); 470 } 471 472 static void 473 virgl_cmd_ctx_detach_resource(VuGpu *g, 474 struct virtio_gpu_ctrl_command *cmd) 475 { 476 struct virtio_gpu_ctx_resource det_res; 477 478 VUGPU_FILL_CMD(det_res); 479 480 virgl_renderer_ctx_detach_resource(det_res.hdr.ctx_id, det_res.resource_id); 481 } 482 483 void vg_virgl_process_cmd(VuGpu *g, struct virtio_gpu_ctrl_command *cmd) 484 { 485 virgl_renderer_force_ctx_0(); 486 switch (cmd->cmd_hdr.type) { 487 case VIRTIO_GPU_CMD_CTX_CREATE: 488 virgl_cmd_context_create(g, cmd); 489 break; 490 case VIRTIO_GPU_CMD_CTX_DESTROY: 491 virgl_cmd_context_destroy(g, cmd); 492 break; 493 case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D: 494 virgl_cmd_create_resource_2d(g, cmd); 495 break; 496 case VIRTIO_GPU_CMD_RESOURCE_CREATE_3D: 497 virgl_cmd_create_resource_3d(g, cmd); 498 break; 499 case VIRTIO_GPU_CMD_SUBMIT_3D: 500 virgl_cmd_submit_3d(g, cmd); 501 break; 502 case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D: 503 virgl_cmd_transfer_to_host_2d(g, cmd); 504 break; 505 case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D: 506 virgl_cmd_transfer_to_host_3d(g, cmd); 507 break; 508 case VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D: 509 virgl_cmd_transfer_from_host_3d(g, cmd); 510 break; 511 case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING: 512 virgl_resource_attach_backing(g, cmd); 513 break; 514 case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING: 515 virgl_resource_detach_backing(g, cmd); 516 break; 517 case VIRTIO_GPU_CMD_SET_SCANOUT: 518 virgl_cmd_set_scanout(g, cmd); 519 break; 520 case VIRTIO_GPU_CMD_RESOURCE_FLUSH: 521 virgl_cmd_resource_flush(g, cmd); 522 break; 523 case VIRTIO_GPU_CMD_RESOURCE_UNREF: 524 virgl_cmd_resource_unref(g, cmd); 525 break; 526 case VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE: 527 /* TODO add security */ 528 virgl_cmd_ctx_attach_resource(g, cmd); 529 break; 530 case VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE: 531 /* TODO add security */ 532 virgl_cmd_ctx_detach_resource(g, cmd); 533 break; 534 case VIRTIO_GPU_CMD_GET_CAPSET_INFO: 535 virgl_cmd_get_capset_info(g, cmd); 536 break; 537 case VIRTIO_GPU_CMD_GET_CAPSET: 538 virgl_cmd_get_capset(g, cmd); 539 break; 540 case VIRTIO_GPU_CMD_GET_DISPLAY_INFO: 541 vg_get_display_info(g, cmd); 542 break; 543 case VIRTIO_GPU_CMD_GET_EDID: 544 vg_get_edid(g, cmd); 545 break; 546 default: 547 g_debug("TODO handle ctrl %x\n", cmd->cmd_hdr.type); 548 cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC; 549 break; 550 } 551 552 if (cmd->state != VG_CMD_STATE_NEW) { 553 return; 554 } 555 556 if (cmd->error) { 557 g_warning("%s: ctrl 0x%x, error 0x%x\n", __func__, 558 cmd->cmd_hdr.type, cmd->error); 559 vg_ctrl_response_nodata(g, cmd, cmd->error); 560 return; 561 } 562 563 if (!(cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE)) { 564 vg_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA); 565 return; 566 } 567 568 g_debug("Creating fence id:%" PRId64 " type:%d", 569 cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type); 570 virgl_renderer_create_fence(cmd->cmd_hdr.fence_id, cmd->cmd_hdr.type); 571 } 572 573 static void 574 virgl_write_fence(void *opaque, uint32_t fence) 575 { 576 VuGpu *g = opaque; 577 struct virtio_gpu_ctrl_command *cmd, *tmp; 578 579 QTAILQ_FOREACH_SAFE(cmd, &g->fenceq, next, tmp) { 580 /* 581 * the guest can end up emitting fences out of order 582 * so we should check all fenced cmds not just the first one. 583 */ 584 if (cmd->cmd_hdr.fence_id > fence) { 585 continue; 586 } 587 g_debug("FENCE %" PRIu64, cmd->cmd_hdr.fence_id); 588 vg_ctrl_response_nodata(g, cmd, VIRTIO_GPU_RESP_OK_NODATA); 589 QTAILQ_REMOVE(&g->fenceq, cmd, next); 590 free(cmd); 591 g->inflight--; 592 } 593 } 594 595 #if defined(VIRGL_RENDERER_CALLBACKS_VERSION) && \ 596 VIRGL_RENDERER_CALLBACKS_VERSION >= 2 597 static int 598 virgl_get_drm_fd(void *opaque) 599 { 600 VuGpu *g = opaque; 601 602 return g->drm_rnode_fd; 603 } 604 #endif 605 606 static struct virgl_renderer_callbacks virgl_cbs = { 607 #if defined(VIRGL_RENDERER_CALLBACKS_VERSION) && \ 608 VIRGL_RENDERER_CALLBACKS_VERSION >= 2 609 .get_drm_fd = virgl_get_drm_fd, 610 .version = 2, 611 #else 612 .version = 1, 613 #endif 614 .write_fence = virgl_write_fence, 615 }; 616 617 static void 618 vg_virgl_poll(VuDev *dev, int condition, void *data) 619 { 620 virgl_renderer_poll(); 621 } 622 623 bool 624 vg_virgl_init(VuGpu *g) 625 { 626 int ret; 627 628 if (g->drm_rnode_fd && virgl_cbs.version == 1) { 629 g_warning("virgl will use the default rendernode"); 630 } 631 632 ret = virgl_renderer_init(g, 633 VIRGL_RENDERER_USE_EGL | 634 VIRGL_RENDERER_THREAD_SYNC, 635 &virgl_cbs); 636 if (ret != 0) { 637 return false; 638 } 639 640 ret = virgl_renderer_get_poll_fd(); 641 if (ret != -1) { 642 g->renderer_source = 643 vug_source_new(&g->dev, ret, G_IO_IN, vg_virgl_poll, g); 644 } 645 646 return true; 647 } 648