drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2022 VMware, Inc., Palo Alto, CA., USA
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <drm/drm_atomic.h>
  29 #include <drm/drm_atomic_helper.h>
  30 #include <drm/drm_fourcc.h>
  31 #include <drm/drm_plane_helper.h>
  32 #include <drm/drm_vblank.h>
  33
  34 #include "vmwgfx_kms.h"
  35
  36 #define vmw_crtc_to_ldu(x) \
  37         container_of(x, struct vmw_legacy_display_unit, base.crtc)
  38 #define vmw_encoder_to_ldu(x) \
  39         container_of(x, struct vmw_legacy_display_unit, base.encoder)
  40 #define vmw_connector_to_ldu(x) \
  41         container_of(x, struct vmw_legacy_display_unit, base.connector)
  42
  43 struct vmw_legacy_display {
  44         struct list_head active;
  45
  46         unsigned num_active;
  47         unsigned last_num_active;
  48
  49         struct vmw_framebuffer *fb;
  50 };
  51
  52 /*
  53  * Display unit using the legacy register interface.
  54  */
  55 struct vmw_legacy_display_unit {
  56         struct vmw_display_unit base;
  57
  58         struct list_head active;
  59 };
  60
  61 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
  62 {
  63         list_del_init(&ldu->active);
  64         vmw_du_cleanup(&ldu->base);
  65         kfree(ldu);
  66 }
  67
  68
  69 /*
  70  * Legacy Display Unit CRTC functions
  71  */
  72
  73 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
  74 {
  75         vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
  76 }
  77
  78 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
  79 {
  80         struct vmw_legacy_display *lds = dev_priv->ldu_priv;
  81         struct vmw_legacy_display_unit *entry;
  82         struct drm_framebuffer *fb = NULL;
  83         struct drm_crtc *crtc = NULL;
  84         int i;
  85
  86         /* If there is no display topology the host just assumes
  87          * that the guest will set the same layout as the host.
  88          */
  89         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
  90                 int w = 0, h = 0;
  91                 list_for_each_entry(entry, &lds->active, active) {
  92                         crtc = &entry->base.crtc;
  93                         w = max(w, crtc->x + crtc->mode.hdisplay);
  94                         h = max(h, crtc->y + crtc->mode.vdisplay);
  95                 }
  96
  97                 if (crtc == NULL)
  98                         return 0;
  99                 fb = crtc->primary->state->fb;
 100
 101                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
 102                                           fb->format->cpp[0] * 8,
 103                                           fb->format->depth);
 104         }
 105
 106         if (!list_empty(&lds->active)) {
 107                 entry = list_entry(lds->active.next, typeof(*entry), active);
 108                 fb = entry->base.crtc.primary->state->fb;
 109
 110                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 111                                    fb->format->cpp[0] * 8, fb->format->depth);
 112         }
 113
 114         /* Make sure we always show something. */
 115         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 116                   lds->num_active ? lds->num_active : 1);
 117
 118         i = 0;
 119         list_for_each_entry(entry, &lds->active, active) {
 120                 crtc = &entry->base.crtc;
 121
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 125                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 126                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 127                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 128
 129                 i++;
 130         }
 131
 132         BUG_ON(i != lds->num_active);
 133
 134         lds->last_num_active = lds->num_active;
 135
 136         return 0;
 137 }
 138
 139 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 140                               struct vmw_legacy_display_unit *ldu)
 141 {
 142         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 143         if (list_empty(&ldu->active))
 144                 return 0;
 145
 146         /* Must init otherwise list_empty(&ldu->active) will not work. */
 147         list_del_init(&ldu->active);
 148         if (--(ld->num_active) == 0) {
 149                 BUG_ON(!ld->fb);
 150                 if (ld->fb->unpin)
 151                         ld->fb->unpin(ld->fb);
 152                 ld->fb = NULL;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 159                               struct vmw_legacy_display_unit *ldu,
 160                               struct vmw_framebuffer *vfb)
 161 {
 162         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 163         struct vmw_legacy_display_unit *entry;
 164         struct list_head *at;
 165
 166         BUG_ON(!ld->num_active && ld->fb);
 167         if (vfb != ld->fb) {
 168                 if (ld->fb && ld->fb->unpin)
 169                         ld->fb->unpin(ld->fb);
 170                 vmw_svga_enable(vmw_priv);
 171                 if (vfb->pin)
 172                         vfb->pin(vfb);
 173                 ld->fb = vfb;
 174         }
 175
 176         if (!list_empty(&ldu->active))
 177                 return 0;
 178
 179         at = &ld->active;
 180         list_for_each_entry(entry, &ld->active, active) {
 181                 if (entry->base.unit > ldu->base.unit)
 182                         break;
 183
 184                 at = &entry->active;
 185         }
 186
 187         list_add(&ldu->active, at);
 188
 189         ld->num_active++;
 190
 191         return 0;
 192 }
 193
 194 /**
 195  * vmw_ldu_crtc_mode_set_nofb - Enable svga
 196  *
 197  * @crtc: CRTC associated with the new screen
 198  *
 199  * For LDU, just enable the svga
 200  */
 201 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 202 {
 203 }
 204
 205 /**
 206  * vmw_ldu_crtc_atomic_enable - Noop
 207  *
 208  * @crtc: CRTC associated with the new screen
 209  * @state: Unused
 210  *
 211  * This is called after a mode set has been completed.  Here's
 212  * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
 213  * but since for LDU the display plane is closely tied to the
 214  * CRTC, it makes more sense to do those at plane update time.
 215  */
 216 static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
 217                                        struct drm_atomic_state *state)
 218 {
 219 }
 220
 221 /**
 222  * vmw_ldu_crtc_atomic_disable - Turns off CRTC
 223  *
 224  * @crtc: CRTC to be turned off
 225  * @state: Unused
 226  */
 227 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
 228                                         struct drm_atomic_state *state)
 229 {
 230 }
 231
 232 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 233         .gamma_set = vmw_du_crtc_gamma_set,
 234         .destroy = vmw_ldu_crtc_destroy,
 235         .reset = vmw_du_crtc_reset,
 236         .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
 237         .atomic_destroy_state = vmw_du_crtc_destroy_state,
 238         .set_config = drm_atomic_helper_set_config,
 239         .get_vblank_counter = vmw_get_vblank_counter,
 240         .enable_vblank = vmw_enable_vblank,
 241         .disable_vblank = vmw_disable_vblank,
 242 };
 243
 244
 245 /*
 246  * Legacy Display Unit encoder functions
 247  */
 248
 249 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 250 {
 251         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 252 }
 253
 254 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 255         .destroy = vmw_ldu_encoder_destroy,
 256 };
 257
 258 /*
 259  * Legacy Display Unit connector functions
 260  */
 261
 262 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 263 {
 264         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 265 }
 266
 267 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 268         .dpms = vmw_du_connector_dpms,
 269         .detect = vmw_du_connector_detect,
 270         .fill_modes = vmw_du_connector_fill_modes,
 271         .destroy = vmw_ldu_connector_destroy,
 272         .reset = vmw_du_connector_reset,
 273         .atomic_duplicate_state = vmw_du_connector_duplicate_state,
 274         .atomic_destroy_state = vmw_du_connector_destroy_state,
 275 };
 276
 277 static const struct
 278 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
 279 };
 280
 281 /*
 282  * Legacy Display Plane Functions
 283  */
 284
 285 static void
 286 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
 287                                     struct drm_atomic_state *state)
 288 {
 289         struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
 290                                                                            plane);
 291         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 292                                                                            plane);
 293         struct vmw_private *dev_priv;
 294         struct vmw_legacy_display_unit *ldu;
 295         struct vmw_framebuffer *vfb;
 296         struct drm_framebuffer *fb;
 297         struct drm_crtc *crtc = new_state->crtc ?: old_state->crtc;
 298
 299
 300         ldu = vmw_crtc_to_ldu(crtc);
 301         dev_priv = vmw_priv(plane->dev);
 302         fb       = new_state->fb;
 303
 304         vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
 305
 306         if (vfb)
 307                 vmw_ldu_add_active(dev_priv, ldu, vfb);
 308         else
 309                 vmw_ldu_del_active(dev_priv, ldu);
 310
 311         vmw_ldu_commit_list(dev_priv);
 312 }
 313
 314
 315 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
 316         .update_plane = drm_atomic_helper_update_plane,
 317         .disable_plane = drm_atomic_helper_disable_plane,
 318         .destroy = vmw_du_primary_plane_destroy,
 319         .reset = vmw_du_plane_reset,
 320         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 321         .atomic_destroy_state = vmw_du_plane_destroy_state,
 322 };
 323
 324 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
 325         .update_plane = drm_atomic_helper_update_plane,
 326         .disable_plane = drm_atomic_helper_disable_plane,
 327         .destroy = vmw_du_cursor_plane_destroy,
 328         .reset = vmw_du_plane_reset,
 329         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 330         .atomic_destroy_state = vmw_du_plane_destroy_state,
 331 };
 332
 333 /*
 334  * Atomic Helpers
 335  */
 336 static const struct
 337 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
 338         .atomic_check = vmw_du_cursor_plane_atomic_check,
 339         .atomic_update = vmw_du_cursor_plane_atomic_update,
 340         .prepare_fb = vmw_du_cursor_plane_prepare_fb,
 341         .cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
 342 };
 343
 344 static const struct
 345 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
 346         .atomic_check = vmw_du_primary_plane_atomic_check,
 347         .atomic_update = vmw_ldu_primary_plane_atomic_update,
 348 };
 349
 350 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
 351         .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 352         .atomic_check = vmw_du_crtc_atomic_check,
 353         .atomic_begin = vmw_du_crtc_atomic_begin,
 354         .atomic_flush = vmw_du_crtc_atomic_flush,
 355         .atomic_enable = vmw_ldu_crtc_atomic_enable,
 356         .atomic_disable = vmw_ldu_crtc_atomic_disable,
 357 };
 358
 359
 360 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 361 {
 362         struct vmw_legacy_display_unit *ldu;
 363         struct drm_device *dev = &dev_priv->drm;
 364         struct drm_connector *connector;
 365         struct drm_encoder *encoder;
 366         struct drm_plane *primary;
 367         struct vmw_cursor_plane *cursor;
 368         struct drm_crtc *crtc;
 369         int ret;
 370
 371         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 372         if (!ldu)
 373                 return -ENOMEM;
 374
 375         ldu->base.unit = unit;
 376         crtc = &ldu->base.crtc;
 377         encoder = &ldu->base.encoder;
 378         connector = &ldu->base.connector;
 379         primary = &ldu->base.primary;
 380         cursor = &ldu->base.cursor;
 381
 382         INIT_LIST_HEAD(&ldu->active);
 383
 384         ldu->base.pref_active = (unit == 0);
 385         ldu->base.pref_width = dev_priv->initial_width;
 386         ldu->base.pref_height = dev_priv->initial_height;
 387         ldu->base.pref_mode = NULL;
 388
 389         /*
 390          * Remove this after enabling atomic because property values can
 391          * only exist in a state object
 392          */
 393         ldu->base.is_implicit = true;
 394
 395         /* Initialize primary plane */
 396         ret = drm_universal_plane_init(dev, primary,
 397                                        0, &vmw_ldu_plane_funcs,
 398                                        vmw_primary_plane_formats,
 399                                        ARRAY_SIZE(vmw_primary_plane_formats),
 400                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
 401         if (ret) {
 402                 DRM_ERROR("Failed to initialize primary plane");
 403                 goto err_free;
 404         }
 405
 406         drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
 407
 408         /*
 409          * We're going to be using traces and software cursors
 410          */
 411         if (vmw_cmd_supported(dev_priv)) {
 412                 /* Initialize cursor plane */
 413                 ret = drm_universal_plane_init(dev, &cursor->base,
 414                                                0, &vmw_ldu_cursor_funcs,
 415                                                vmw_cursor_plane_formats,
 416                                                ARRAY_SIZE(vmw_cursor_plane_formats),
 417                                                NULL, DRM_PLANE_TYPE_CURSOR, NULL);
 418                 if (ret) {
 419                         DRM_ERROR("Failed to initialize cursor plane");
 420                         drm_plane_cleanup(&ldu->base.primary);
 421                         goto err_free;
 422                 }
 423
 424                 drm_plane_helper_add(&cursor->base, &vmw_ldu_cursor_plane_helper_funcs);
 425         }
 426
 427         ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 428                                  DRM_MODE_CONNECTOR_VIRTUAL);
 429         if (ret) {
 430                 DRM_ERROR("Failed to initialize connector\n");
 431                 goto err_free;
 432         }
 433
 434         drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
 435         connector->status = vmw_du_connector_detect(connector, true);
 436
 437         ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 438                                DRM_MODE_ENCODER_VIRTUAL, NULL);
 439         if (ret) {
 440                 DRM_ERROR("Failed to initialize encoder\n");
 441                 goto err_free_connector;
 442         }
 443
 444         (void) drm_connector_attach_encoder(connector, encoder);
 445         encoder->possible_crtcs = (1 << unit);
 446         encoder->possible_clones = 0;
 447
 448         ret = drm_connector_register(connector);
 449         if (ret) {
 450                 DRM_ERROR("Failed to register connector\n");
 451                 goto err_free_encoder;
 452         }
 453
 454         ret = drm_crtc_init_with_planes(dev, crtc, primary,
 455                       vmw_cmd_supported(dev_priv) ? &cursor->base : NULL,
 456                       &vmw_legacy_crtc_funcs, NULL);
 457         if (ret) {
 458                 DRM_ERROR("Failed to initialize CRTC\n");
 459                 goto err_free_unregister;
 460         }
 461
 462         drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
 463
 464         drm_mode_crtc_set_gamma_size(crtc, 256);
 465
 466         drm_object_attach_property(&connector->base,
 467                                    dev_priv->hotplug_mode_update_property, 1);
 468         drm_object_attach_property(&connector->base,
 469                                    dev->mode_config.suggested_x_property, 0);
 470         drm_object_attach_property(&connector->base,
 471                                    dev->mode_config.suggested_y_property, 0);
 472         if (dev_priv->implicit_placement_property)
 473                 drm_object_attach_property
 474                         (&connector->base,
 475                          dev_priv->implicit_placement_property,
 476                          1);
 477
 478         return 0;
 479
 480 err_free_unregister:
 481         drm_connector_unregister(connector);
 482 err_free_encoder:
 483         drm_encoder_cleanup(encoder);
 484 err_free_connector:
 485         drm_connector_cleanup(connector);
 486 err_free:
 487         kfree(ldu);
 488         return ret;
 489 }
 490
 491 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 492 {
 493         struct drm_device *dev = &dev_priv->drm;
 494         int i, ret;
 495         int num_display_units = (dev_priv->capabilities & SVGA_CAP_MULTIMON) ?
 496                                         VMWGFX_NUM_DISPLAY_UNITS : 1;
 497
 498         if (unlikely(dev_priv->ldu_priv)) {
 499                 return -EINVAL;
 500         }
 501
 502         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 503         if (!dev_priv->ldu_priv)
 504                 return -ENOMEM;
 505
 506         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 507         dev_priv->ldu_priv->num_active = 0;
 508         dev_priv->ldu_priv->last_num_active = 0;
 509         dev_priv->ldu_priv->fb = NULL;
 510
 511         ret = drm_vblank_init(dev, num_display_units);
 512         if (ret != 0)
 513                 goto err_free;
 514
 515         vmw_kms_create_implicit_placement_property(dev_priv);
 516
 517         for (i = 0; i < num_display_units; ++i) {
 518                 ret = vmw_ldu_init(dev_priv, i);
 519                 if (ret != 0)
 520                         goto err_free;
 521         }
 522
 523         dev_priv->active_display_unit = vmw_du_legacy;
 524
 525         drm_mode_config_reset(dev);
 526
 527         return 0;
 528
 529 err_free:
 530         kfree(dev_priv->ldu_priv);
 531         dev_priv->ldu_priv = NULL;
 532         return ret;
 533 }
 534
 535 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 536 {
 537         if (!dev_priv->ldu_priv)
 538                 return -ENOSYS;
 539
 540         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 541
 542         kfree(dev_priv->ldu_priv);
 543
 544         return 0;
 545 }
 546
 547
 548 int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
 549                             struct vmw_framebuffer *framebuffer,
 550                             unsigned int flags, unsigned int color,
 551                             struct drm_clip_rect *clips,
 552                             unsigned int num_clips, int increment)
 553 {
 554         size_t fifo_size;
 555         int i;
 556
 557         struct {
 558                 uint32_t header;
 559                 SVGAFifoCmdUpdate body;
 560         } *cmd;
 561
 562         fifo_size = sizeof(*cmd) * num_clips;
 563         cmd = VMW_CMD_RESERVE(dev_priv, fifo_size);
 564         if (unlikely(cmd == NULL))
 565                 return -ENOMEM;
 566
 567         memset(cmd, 0, fifo_size);
 568         for (i = 0; i < num_clips; i++, clips += increment) {
 569                 cmd[i].header = SVGA_CMD_UPDATE;
 570                 cmd[i].body.x = clips->x1;
 571                 cmd[i].body.y = clips->y1;
 572                 cmd[i].body.width = clips->x2 - clips->x1;
 573                 cmd[i].body.height = clips->y2 - clips->y1;
 574         }
 575
 576         vmw_cmd_commit(dev_priv, fifo_size);
 577         return 0;
 578 }