1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /************************************************************************** 3 * 4 * Copyright (c) 2009-2024 Broadcom. All Rights Reserved. The term 5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 25 * USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 29 #include "vmwgfx_bo.h" 30 #include "vmwgfx_kms.h" 31 #include "vmwgfx_vkms.h" 32 33 #include <drm/drm_atomic.h> 34 #include <drm/drm_atomic_helper.h> 35 #include <drm/drm_fourcc.h> 36 37 38 #define vmw_crtc_to_ldu(x) \ 39 container_of(x, struct vmw_legacy_display_unit, base.crtc) 40 #define vmw_encoder_to_ldu(x) \ 41 container_of(x, struct vmw_legacy_display_unit, base.encoder) 42 #define vmw_connector_to_ldu(x) \ 43 container_of(x, struct vmw_legacy_display_unit, base.connector) 44 45 struct vmw_legacy_display { 46 struct list_head active; 47 48 unsigned num_active; 49 unsigned last_num_active; 50 51 struct vmw_framebuffer *fb; 52 }; 53 54 /* 55 * Display unit using the legacy register interface. 56 */ 57 struct vmw_legacy_display_unit { 58 struct vmw_display_unit base; 59 60 struct list_head active; 61 }; 62 63 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu) 64 { 65 list_del_init(&ldu->active); 66 vmw_du_cleanup(&ldu->base); 67 kfree(ldu); 68 } 69 70 71 /* 72 * Legacy Display Unit CRTC functions 73 */ 74 75 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc) 76 { 77 vmw_ldu_destroy(vmw_crtc_to_ldu(crtc)); 78 } 79 80 static int vmw_ldu_commit_list(struct vmw_private *dev_priv) 81 { 82 struct vmw_legacy_display *lds = dev_priv->ldu_priv; 83 struct vmw_legacy_display_unit *entry; 84 struct drm_framebuffer *fb = NULL; 85 struct drm_crtc *crtc = NULL; 86 int i; 87 88 /* If there is no display topology the host just assumes 89 * that the guest will set the same layout as the host. 90 */ 91 if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) { 92 int w = 0, h = 0; 93 list_for_each_entry(entry, &lds->active, active) { 94 crtc = &entry->base.crtc; 95 w = max(w, crtc->x + crtc->mode.hdisplay); 96 h = max(h, crtc->y + crtc->mode.vdisplay); 97 } 98 99 if (crtc == NULL) 100 return 0; 101 fb = crtc->primary->state->fb; 102 103 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0], 104 fb->format->cpp[0] * 8, 105 fb->format->depth); 106 } 107 108 if (!list_empty(&lds->active)) { 109 entry = list_entry(lds->active.next, typeof(*entry), active); 110 fb = entry->base.crtc.primary->state->fb; 111 112 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0], 113 fb->format->cpp[0] * 8, fb->format->depth); 114 } 115 116 /* Make sure we always show something. */ 117 vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 118 lds->num_active ? lds->num_active : 1); 119 120 i = 0; 121 list_for_each_entry(entry, &lds->active, active) { 122 crtc = &entry->base.crtc; 123 124 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i); 125 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i); 126 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x); 127 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y); 128 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay); 129 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay); 130 131 i++; 132 } 133 134 BUG_ON(i != lds->num_active); 135 136 lds->last_num_active = lds->num_active; 137 138 return 0; 139 } 140 141 /* 142 * Pin the buffer in a location suitable for access by the 143 * display system. 144 */ 145 static int vmw_ldu_fb_pin(struct vmw_framebuffer *vfb) 146 { 147 struct vmw_private *dev_priv = vmw_priv(vfb->base.dev); 148 struct vmw_bo *buf; 149 int ret; 150 151 buf = vfb->bo ? 152 vmw_framebuffer_to_vfbd(&vfb->base)->buffer : 153 vmw_user_object_buffer(&vmw_framebuffer_to_vfbs(&vfb->base)->uo); 154 155 if (!buf) 156 return 0; 157 WARN_ON(dev_priv->active_display_unit != vmw_du_legacy); 158 159 if (dev_priv->active_display_unit == vmw_du_legacy) { 160 vmw_overlay_pause_all(dev_priv); 161 ret = vmw_bo_pin_in_start_of_vram(dev_priv, buf, false); 162 vmw_overlay_resume_all(dev_priv); 163 } else 164 ret = -EINVAL; 165 166 return ret; 167 } 168 169 static int vmw_ldu_fb_unpin(struct vmw_framebuffer *vfb) 170 { 171 struct vmw_private *dev_priv = vmw_priv(vfb->base.dev); 172 struct vmw_bo *buf; 173 174 buf = vfb->bo ? 175 vmw_framebuffer_to_vfbd(&vfb->base)->buffer : 176 vmw_user_object_buffer(&vmw_framebuffer_to_vfbs(&vfb->base)->uo); 177 178 179 if (WARN_ON(!buf)) 180 return 0; 181 182 return vmw_bo_unpin(dev_priv, buf, false); 183 } 184 185 static int vmw_ldu_del_active(struct vmw_private *vmw_priv, 186 struct vmw_legacy_display_unit *ldu) 187 { 188 struct vmw_legacy_display *ld = vmw_priv->ldu_priv; 189 if (list_empty(&ldu->active)) 190 return 0; 191 192 /* Must init otherwise list_empty(&ldu->active) will not work. */ 193 list_del_init(&ldu->active); 194 if (--(ld->num_active) == 0) { 195 BUG_ON(!ld->fb); 196 WARN_ON(vmw_ldu_fb_unpin(ld->fb)); 197 ld->fb = NULL; 198 } 199 200 return 0; 201 } 202 203 static int vmw_ldu_add_active(struct vmw_private *vmw_priv, 204 struct vmw_legacy_display_unit *ldu, 205 struct vmw_framebuffer *vfb) 206 { 207 struct vmw_legacy_display *ld = vmw_priv->ldu_priv; 208 struct vmw_legacy_display_unit *entry; 209 struct list_head *at; 210 211 BUG_ON(!ld->num_active && ld->fb); 212 if (vfb != ld->fb) { 213 if (ld->fb) 214 WARN_ON(vmw_ldu_fb_unpin(ld->fb)); 215 vmw_svga_enable(vmw_priv); 216 WARN_ON(vmw_ldu_fb_pin(vfb)); 217 ld->fb = vfb; 218 } 219 220 if (!list_empty(&ldu->active)) 221 return 0; 222 223 at = &ld->active; 224 list_for_each_entry(entry, &ld->active, active) { 225 if (entry->base.unit > ldu->base.unit) 226 break; 227 228 at = &entry->active; 229 } 230 231 list_add(&ldu->active, at); 232 233 ld->num_active++; 234 235 return 0; 236 } 237 238 /** 239 * vmw_ldu_crtc_mode_set_nofb - Enable svga 240 * 241 * @crtc: CRTC associated with the new screen 242 * 243 * For LDU, just enable the svga 244 */ 245 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc) 246 { 247 } 248 249 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = { 250 .gamma_set = vmw_du_crtc_gamma_set, 251 .destroy = vmw_ldu_crtc_destroy, 252 .reset = vmw_du_crtc_reset, 253 .atomic_duplicate_state = vmw_du_crtc_duplicate_state, 254 .atomic_destroy_state = vmw_du_crtc_destroy_state, 255 .set_config = drm_atomic_helper_set_config, 256 .page_flip = drm_atomic_helper_page_flip, 257 .enable_vblank = vmw_vkms_enable_vblank, 258 .disable_vblank = vmw_vkms_disable_vblank, 259 .get_vblank_timestamp = vmw_vkms_get_vblank_timestamp, 260 }; 261 262 263 /* 264 * Legacy Display Unit encoder functions 265 */ 266 267 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder) 268 { 269 vmw_ldu_destroy(vmw_encoder_to_ldu(encoder)); 270 } 271 272 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = { 273 .destroy = vmw_ldu_encoder_destroy, 274 }; 275 276 /* 277 * Legacy Display Unit connector functions 278 */ 279 280 static void vmw_ldu_connector_destroy(struct drm_connector *connector) 281 { 282 vmw_ldu_destroy(vmw_connector_to_ldu(connector)); 283 } 284 285 static const struct drm_connector_funcs vmw_legacy_connector_funcs = { 286 .dpms = vmw_du_connector_dpms, 287 .detect = vmw_du_connector_detect, 288 .fill_modes = drm_helper_probe_single_connector_modes, 289 .destroy = vmw_ldu_connector_destroy, 290 .reset = vmw_du_connector_reset, 291 .atomic_duplicate_state = vmw_du_connector_duplicate_state, 292 .atomic_destroy_state = vmw_du_connector_destroy_state, 293 }; 294 295 static const struct 296 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = { 297 .get_modes = vmw_connector_get_modes, 298 .mode_valid = vmw_connector_mode_valid 299 }; 300 301 static int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv, 302 struct vmw_framebuffer *framebuffer, 303 unsigned int flags, unsigned int color, 304 struct drm_mode_rect *clips, 305 unsigned int num_clips); 306 307 /* 308 * Legacy Display Plane Functions 309 */ 310 311 static void 312 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane, 313 struct drm_atomic_state *state) 314 { 315 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, 316 plane); 317 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 318 plane); 319 struct vmw_private *dev_priv; 320 struct vmw_legacy_display_unit *ldu; 321 struct vmw_framebuffer *vfb; 322 struct drm_framebuffer *fb; 323 struct drm_crtc *crtc = new_state->crtc ?: old_state->crtc; 324 325 ldu = vmw_crtc_to_ldu(crtc); 326 dev_priv = vmw_priv(plane->dev); 327 fb = new_state->fb; 328 329 vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL; 330 331 if (vfb) 332 vmw_ldu_add_active(dev_priv, ldu, vfb); 333 else 334 vmw_ldu_del_active(dev_priv, ldu); 335 336 vmw_ldu_commit_list(dev_priv); 337 338 if (vfb && vmw_cmd_supported(dev_priv)) { 339 struct drm_mode_rect fb_rect = { 340 .x1 = 0, 341 .y1 = 0, 342 .x2 = vfb->base.width, 343 .y2 = vfb->base.height 344 }; 345 struct drm_mode_rect *damage_rects = drm_plane_get_damage_clips(new_state); 346 u32 rect_count = drm_plane_get_damage_clips_count(new_state); 347 int ret; 348 349 if (!damage_rects) { 350 damage_rects = &fb_rect; 351 rect_count = 1; 352 } 353 354 ret = vmw_kms_ldu_do_bo_dirty(dev_priv, vfb, 0, 0, damage_rects, rect_count); 355 356 drm_WARN_ONCE(plane->dev, ret, 357 "vmw_kms_ldu_do_bo_dirty failed with: ret=%d\n", ret); 358 359 vmw_cmd_flush(dev_priv, false); 360 } 361 } 362 363 static const struct drm_plane_funcs vmw_ldu_plane_funcs = { 364 .update_plane = drm_atomic_helper_update_plane, 365 .disable_plane = drm_atomic_helper_disable_plane, 366 .destroy = vmw_du_primary_plane_destroy, 367 .reset = vmw_du_plane_reset, 368 .atomic_duplicate_state = vmw_du_plane_duplicate_state, 369 .atomic_destroy_state = vmw_du_plane_destroy_state, 370 }; 371 372 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = { 373 .update_plane = drm_atomic_helper_update_plane, 374 .disable_plane = drm_atomic_helper_disable_plane, 375 .destroy = vmw_du_cursor_plane_destroy, 376 .reset = vmw_du_plane_reset, 377 .atomic_duplicate_state = vmw_du_plane_duplicate_state, 378 .atomic_destroy_state = vmw_du_plane_destroy_state, 379 }; 380 381 /* 382 * Atomic Helpers 383 */ 384 static const struct 385 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = { 386 .atomic_check = vmw_du_cursor_plane_atomic_check, 387 .atomic_update = vmw_du_cursor_plane_atomic_update, 388 .prepare_fb = vmw_du_cursor_plane_prepare_fb, 389 .cleanup_fb = vmw_du_cursor_plane_cleanup_fb, 390 }; 391 392 static const struct 393 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = { 394 .atomic_check = vmw_du_primary_plane_atomic_check, 395 .atomic_update = vmw_ldu_primary_plane_atomic_update, 396 }; 397 398 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = { 399 .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb, 400 .atomic_check = vmw_du_crtc_atomic_check, 401 .atomic_begin = vmw_du_crtc_atomic_begin, 402 .atomic_flush = vmw_vkms_crtc_atomic_flush, 403 .atomic_enable = vmw_vkms_crtc_atomic_enable, 404 .atomic_disable = vmw_vkms_crtc_atomic_disable, 405 }; 406 407 408 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit) 409 { 410 struct vmw_legacy_display_unit *ldu; 411 struct drm_device *dev = &dev_priv->drm; 412 struct drm_connector *connector; 413 struct drm_encoder *encoder; 414 struct drm_plane *primary; 415 struct vmw_cursor_plane *cursor; 416 struct drm_crtc *crtc; 417 int ret; 418 419 ldu = kzalloc(sizeof(*ldu), GFP_KERNEL); 420 if (!ldu) 421 return -ENOMEM; 422 423 ldu->base.unit = unit; 424 crtc = &ldu->base.crtc; 425 encoder = &ldu->base.encoder; 426 connector = &ldu->base.connector; 427 primary = &ldu->base.primary; 428 cursor = &ldu->base.cursor; 429 430 INIT_LIST_HEAD(&ldu->active); 431 432 ldu->base.pref_active = (unit == 0); 433 ldu->base.pref_width = dev_priv->initial_width; 434 ldu->base.pref_height = dev_priv->initial_height; 435 436 /* 437 * Remove this after enabling atomic because property values can 438 * only exist in a state object 439 */ 440 ldu->base.is_implicit = true; 441 442 /* Initialize primary plane */ 443 ret = drm_universal_plane_init(dev, primary, 444 0, &vmw_ldu_plane_funcs, 445 vmw_primary_plane_formats, 446 ARRAY_SIZE(vmw_primary_plane_formats), 447 NULL, DRM_PLANE_TYPE_PRIMARY, NULL); 448 if (ret) { 449 DRM_ERROR("Failed to initialize primary plane"); 450 goto err_free; 451 } 452 453 drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs); 454 455 /* 456 * We're going to be using traces and software cursors 457 */ 458 if (vmw_cmd_supported(dev_priv)) { 459 /* Initialize cursor plane */ 460 ret = drm_universal_plane_init(dev, &cursor->base, 461 0, &vmw_ldu_cursor_funcs, 462 vmw_cursor_plane_formats, 463 ARRAY_SIZE(vmw_cursor_plane_formats), 464 NULL, DRM_PLANE_TYPE_CURSOR, NULL); 465 if (ret) { 466 DRM_ERROR("Failed to initialize cursor plane"); 467 drm_plane_cleanup(&ldu->base.primary); 468 goto err_free; 469 } 470 471 drm_plane_helper_add(&cursor->base, &vmw_ldu_cursor_plane_helper_funcs); 472 } 473 474 ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs, 475 DRM_MODE_CONNECTOR_VIRTUAL); 476 if (ret) { 477 DRM_ERROR("Failed to initialize connector\n"); 478 goto err_free; 479 } 480 481 drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs); 482 connector->status = vmw_du_connector_detect(connector, true); 483 484 ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs, 485 DRM_MODE_ENCODER_VIRTUAL, NULL); 486 if (ret) { 487 DRM_ERROR("Failed to initialize encoder\n"); 488 goto err_free_connector; 489 } 490 491 (void) drm_connector_attach_encoder(connector, encoder); 492 encoder->possible_crtcs = (1 << unit); 493 encoder->possible_clones = 0; 494 495 ret = drm_connector_register(connector); 496 if (ret) { 497 DRM_ERROR("Failed to register connector\n"); 498 goto err_free_encoder; 499 } 500 501 ret = drm_crtc_init_with_planes(dev, crtc, primary, 502 vmw_cmd_supported(dev_priv) ? &cursor->base : NULL, 503 &vmw_legacy_crtc_funcs, NULL); 504 if (ret) { 505 DRM_ERROR("Failed to initialize CRTC\n"); 506 goto err_free_unregister; 507 } 508 509 drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs); 510 511 drm_mode_crtc_set_gamma_size(crtc, 256); 512 513 drm_object_attach_property(&connector->base, 514 dev_priv->hotplug_mode_update_property, 1); 515 drm_object_attach_property(&connector->base, 516 dev->mode_config.suggested_x_property, 0); 517 drm_object_attach_property(&connector->base, 518 dev->mode_config.suggested_y_property, 0); 519 if (dev_priv->implicit_placement_property) 520 drm_object_attach_property 521 (&connector->base, 522 dev_priv->implicit_placement_property, 523 1); 524 525 vmw_du_init(&ldu->base); 526 527 return 0; 528 529 err_free_unregister: 530 drm_connector_unregister(connector); 531 err_free_encoder: 532 drm_encoder_cleanup(encoder); 533 err_free_connector: 534 drm_connector_cleanup(connector); 535 err_free: 536 kfree(ldu); 537 return ret; 538 } 539 540 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv) 541 { 542 struct drm_device *dev = &dev_priv->drm; 543 int i, ret; 544 int num_display_units = (dev_priv->capabilities & SVGA_CAP_MULTIMON) ? 545 VMWGFX_NUM_DISPLAY_UNITS : 1; 546 547 if (unlikely(dev_priv->ldu_priv)) { 548 return -EINVAL; 549 } 550 551 dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL); 552 if (!dev_priv->ldu_priv) 553 return -ENOMEM; 554 555 INIT_LIST_HEAD(&dev_priv->ldu_priv->active); 556 dev_priv->ldu_priv->num_active = 0; 557 dev_priv->ldu_priv->last_num_active = 0; 558 dev_priv->ldu_priv->fb = NULL; 559 560 vmw_kms_create_implicit_placement_property(dev_priv); 561 562 for (i = 0; i < num_display_units; ++i) { 563 ret = vmw_ldu_init(dev_priv, i); 564 if (ret != 0) 565 goto err_free; 566 } 567 568 dev_priv->active_display_unit = vmw_du_legacy; 569 570 drm_mode_config_reset(dev); 571 572 return 0; 573 574 err_free: 575 kfree(dev_priv->ldu_priv); 576 dev_priv->ldu_priv = NULL; 577 return ret; 578 } 579 580 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv) 581 { 582 if (!dev_priv->ldu_priv) 583 return -ENOSYS; 584 585 BUG_ON(!list_empty(&dev_priv->ldu_priv->active)); 586 587 kfree(dev_priv->ldu_priv); 588 589 return 0; 590 } 591 592 593 static int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv, 594 struct vmw_framebuffer *framebuffer, 595 unsigned int flags, unsigned int color, 596 struct drm_mode_rect *clips, 597 unsigned int num_clips) 598 { 599 size_t fifo_size; 600 int i; 601 602 struct { 603 uint32_t header; 604 SVGAFifoCmdUpdate body; 605 } *cmd; 606 607 fifo_size = sizeof(*cmd) * num_clips; 608 cmd = VMW_CMD_RESERVE(dev_priv, fifo_size); 609 if (unlikely(cmd == NULL)) 610 return -ENOMEM; 611 612 memset(cmd, 0, fifo_size); 613 for (i = 0; i < num_clips; i++, clips++) { 614 cmd[i].header = SVGA_CMD_UPDATE; 615 cmd[i].body.x = clips->x1; 616 cmd[i].body.y = clips->y1; 617 cmd[i].body.width = clips->x2 - clips->x1; 618 cmd[i].body.height = clips->y2 - clips->y1; 619 } 620 621 vmw_cmd_commit(dev_priv, fifo_size); 622 return 0; 623 } 624