drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 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 "vmwgfx_kms.h"
  29 #include <drm/drm_plane_helper.h>
  30 #include <drm/drm_atomic.h>
  31 #include <drm/drm_atomic_helper.h>
  32
  33
  34 #define vmw_crtc_to_ldu(x) \
  35         container_of(x, struct vmw_legacy_display_unit, base.crtc)
  36 #define vmw_encoder_to_ldu(x) \
  37         container_of(x, struct vmw_legacy_display_unit, base.encoder)
  38 #define vmw_connector_to_ldu(x) \
  39         container_of(x, struct vmw_legacy_display_unit, base.connector)
  40
  41 struct vmw_legacy_display {
  42         struct list_head active;
  43
  44         unsigned num_active;
  45         unsigned last_num_active;
  46
  47         struct vmw_framebuffer *fb;
  48 };
  49
  50 /**
  51  * Display unit using the legacy register interface.
  52  */
  53 struct vmw_legacy_display_unit {
  54         struct vmw_display_unit base;
  55
  56         struct list_head active;
  57 };
  58
  59 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
  60 {
  61         list_del_init(&ldu->active);
  62         vmw_du_cleanup(&ldu->base);
  63         kfree(ldu);
  64 }
  65
  66
  67 /*
  68  * Legacy Display Unit CRTC functions
  69  */
  70
  71 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
  72 {
  73         vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
  74 }
  75
  76 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
  77 {
  78         struct vmw_legacy_display *lds = dev_priv->ldu_priv;
  79         struct vmw_legacy_display_unit *entry;
  80         struct drm_framebuffer *fb = NULL;
  81         struct drm_crtc *crtc = NULL;
  82         int i;
  83
  84         /* If there is no display topology the host just assumes
  85          * that the guest will set the same layout as the host.
  86          */
  87         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
  88                 int w = 0, h = 0;
  89                 list_for_each_entry(entry, &lds->active, active) {
  90                         crtc = &entry->base.crtc;
  91                         w = max(w, crtc->x + crtc->mode.hdisplay);
  92                         h = max(h, crtc->y + crtc->mode.vdisplay);
  93                 }
  94
  95                 if (crtc == NULL)
  96                         return 0;
  97                 fb = crtc->primary->state->fb;
  98
  99                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
 100                                           fb->format->cpp[0] * 8,
 101                                           fb->format->depth);
 102         }
 103
 104         if (!list_empty(&lds->active)) {
 105                 entry = list_entry(lds->active.next, typeof(*entry), active);
 106                 fb = entry->base.crtc.primary->state->fb;
 107
 108                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 109                                    fb->format->cpp[0] * 8, fb->format->depth);
 110         }
 111
 112         /* Make sure we always show something. */
 113         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 114                   lds->num_active ? lds->num_active : 1);
 115
 116         i = 0;
 117         list_for_each_entry(entry, &lds->active, active) {
 118                 crtc = &entry->base.crtc;
 119
 120                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 125                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 126                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 127
 128                 i++;
 129         }
 130
 131         BUG_ON(i != lds->num_active);
 132
 133         lds->last_num_active = lds->num_active;
 134
 135         return 0;
 136 }
 137
 138 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 139                               struct vmw_legacy_display_unit *ldu)
 140 {
 141         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 142         if (list_empty(&ldu->active))
 143                 return 0;
 144
 145         /* Must init otherwise list_empty(&ldu->active) will not work. */
 146         list_del_init(&ldu->active);
 147         if (--(ld->num_active) == 0) {
 148                 BUG_ON(!ld->fb);
 149                 if (ld->fb->unpin)
 150                         ld->fb->unpin(ld->fb);
 151                 ld->fb = NULL;
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 158                               struct vmw_legacy_display_unit *ldu,
 159                               struct vmw_framebuffer *vfb)
 160 {
 161         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 162         struct vmw_legacy_display_unit *entry;
 163         struct list_head *at;
 164
 165         BUG_ON(!ld->num_active && ld->fb);
 166         if (vfb != ld->fb) {
 167                 if (ld->fb && ld->fb->unpin)
 168                         ld->fb->unpin(ld->fb);
 169                 vmw_svga_enable(vmw_priv);
 170                 if (vfb->pin)
 171                         vfb->pin(vfb);
 172                 ld->fb = vfb;
 173         }
 174
 175         if (!list_empty(&ldu->active))
 176                 return 0;
 177
 178         at = &ld->active;
 179         list_for_each_entry(entry, &ld->active, active) {
 180                 if (entry->base.unit > ldu->base.unit)
 181                         break;
 182
 183                 at = &entry->active;
 184         }
 185
 186         list_add(&ldu->active, at);
 187
 188         ld->num_active++;
 189
 190         return 0;
 191 }
 192
 193 /**
 194  * vmw_ldu_crtc_mode_set_nofb - Enable svga
 195  *
 196  * @crtc: CRTC associated with the new screen
 197  *
 198  * For LDU, just enable the svga
 199  */
 200 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 201 {
 202 }
 203
 204 /**
 205  * vmw_ldu_crtc_atomic_enable - Noop
 206  *
 207  * @crtc: CRTC associated with the new screen
 208  *
 209  * This is called after a mode set has been completed.  Here's
 210  * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
 211  * but since for LDU the display plane is closely tied to the
 212  * CRTC, it makes more sense to do those at plane update time.
 213  */
 214 static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
 215                                        struct drm_crtc_state *old_state)
 216 {
 217 }
 218
 219 /**
 220  * vmw_ldu_crtc_atomic_disable - Turns off CRTC
 221  *
 222  * @crtc: CRTC to be turned off
 223  */
 224 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
 225                                         struct drm_crtc_state *old_state)
 226 {
 227 }
 228
 229 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 230         .gamma_set = vmw_du_crtc_gamma_set,
 231         .destroy = vmw_ldu_crtc_destroy,
 232         .reset = vmw_du_crtc_reset,
 233         .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
 234         .atomic_destroy_state = vmw_du_crtc_destroy_state,
 235         .set_config = vmw_kms_set_config,
 236 };
 237
 238
 239 /*
 240  * Legacy Display Unit encoder functions
 241  */
 242
 243 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 244 {
 245         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 246 }
 247
 248 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 249         .destroy = vmw_ldu_encoder_destroy,
 250 };
 251
 252 /*
 253  * Legacy Display Unit connector functions
 254  */
 255
 256 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 257 {
 258         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 259 }
 260
 261 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 262         .dpms = vmw_du_connector_dpms,
 263         .detect = vmw_du_connector_detect,
 264         .fill_modes = vmw_du_connector_fill_modes,
 265         .set_property = vmw_du_connector_set_property,
 266         .destroy = vmw_ldu_connector_destroy,
 267         .reset = vmw_du_connector_reset,
 268         .atomic_duplicate_state = vmw_du_connector_duplicate_state,
 269         .atomic_destroy_state = vmw_du_connector_destroy_state,
 270         .atomic_set_property = vmw_du_connector_atomic_set_property,
 271         .atomic_get_property = vmw_du_connector_atomic_get_property,
 272 };
 273
 274 static const struct
 275 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
 276         .best_encoder = drm_atomic_helper_best_encoder,
 277 };
 278
 279 /*
 280  * Legacy Display Plane Functions
 281  */
 282
 283 static void
 284 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
 285                                     struct drm_plane_state *old_state)
 286 {
 287         struct vmw_private *dev_priv;
 288         struct vmw_legacy_display_unit *ldu;
 289         struct vmw_framebuffer *vfb;
 290         struct drm_framebuffer *fb;
 291         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 292
 293
 294         ldu = vmw_crtc_to_ldu(crtc);
 295         dev_priv = vmw_priv(plane->dev);
 296         fb       = plane->state->fb;
 297
 298         vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
 299
 300         if (vfb)
 301                 vmw_ldu_add_active(dev_priv, ldu, vfb);
 302         else
 303                 vmw_ldu_del_active(dev_priv, ldu);
 304
 305         vmw_ldu_commit_list(dev_priv);
 306 }
 307
 308
 309 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
 310         .update_plane = drm_atomic_helper_update_plane,
 311         .disable_plane = drm_atomic_helper_disable_plane,
 312         .destroy = vmw_du_primary_plane_destroy,
 313         .reset = vmw_du_plane_reset,
 314         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 315         .atomic_destroy_state = vmw_du_plane_destroy_state,
 316 };
 317
 318 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
 319         .update_plane = drm_atomic_helper_update_plane,
 320         .disable_plane = drm_atomic_helper_disable_plane,
 321         .destroy = vmw_du_cursor_plane_destroy,
 322         .reset = vmw_du_plane_reset,
 323         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 324         .atomic_destroy_state = vmw_du_plane_destroy_state,
 325 };
 326
 327 /*
 328  * Atomic Helpers
 329  */
 330 static const struct
 331 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
 332         .atomic_check = vmw_du_cursor_plane_atomic_check,
 333         .atomic_update = vmw_du_cursor_plane_atomic_update,
 334         .prepare_fb = vmw_du_cursor_plane_prepare_fb,
 335         .cleanup_fb = vmw_du_plane_cleanup_fb,
 336 };
 337
 338 static const struct
 339 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
 340         .atomic_check = vmw_du_primary_plane_atomic_check,
 341         .atomic_update = vmw_ldu_primary_plane_atomic_update,
 342 };
 343
 344 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
 345         .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 346         .atomic_check = vmw_du_crtc_atomic_check,
 347         .atomic_begin = vmw_du_crtc_atomic_begin,
 348         .atomic_flush = vmw_du_crtc_atomic_flush,
 349         .atomic_enable = vmw_ldu_crtc_atomic_enable,
 350         .atomic_disable = vmw_ldu_crtc_atomic_disable,
 351 };
 352
 353
 354 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 355 {
 356         struct vmw_legacy_display_unit *ldu;
 357         struct drm_device *dev = dev_priv->dev;
 358         struct drm_connector *connector;
 359         struct drm_encoder *encoder;
 360         struct drm_plane *primary, *cursor;
 361         struct drm_crtc *crtc;
 362         int ret;
 363
 364         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 365         if (!ldu)
 366                 return -ENOMEM;
 367
 368         ldu->base.unit = unit;
 369         crtc = &ldu->base.crtc;
 370         encoder = &ldu->base.encoder;
 371         connector = &ldu->base.connector;
 372         primary = &ldu->base.primary;
 373         cursor = &ldu->base.cursor;
 374
 375         INIT_LIST_HEAD(&ldu->active);
 376
 377         ldu->base.pref_active = (unit == 0);
 378         ldu->base.pref_width = dev_priv->initial_width;
 379         ldu->base.pref_height = dev_priv->initial_height;
 380         ldu->base.pref_mode = NULL;
 381
 382         /*
 383          * Remove this after enabling atomic because property values can
 384          * only exist in a state object
 385          */
 386         ldu->base.is_implicit = true;
 387
 388         /* Initialize primary plane */
 389         vmw_du_plane_reset(primary);
 390
 391         ret = drm_universal_plane_init(dev, &ldu->base.primary,
 392                                        0, &vmw_ldu_plane_funcs,
 393                                        vmw_primary_plane_formats,
 394                                        ARRAY_SIZE(vmw_primary_plane_formats),
 395                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
 396         if (ret) {
 397                 DRM_ERROR("Failed to initialize primary plane");
 398                 goto err_free;
 399         }
 400
 401         drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
 402
 403         /* Initialize cursor plane */
 404         vmw_du_plane_reset(cursor);
 405
 406         ret = drm_universal_plane_init(dev, &ldu->base.cursor,
 407                         0, &vmw_ldu_cursor_funcs,
 408                         vmw_cursor_plane_formats,
 409                         ARRAY_SIZE(vmw_cursor_plane_formats),
 410                         NULL, DRM_PLANE_TYPE_CURSOR, NULL);
 411         if (ret) {
 412                 DRM_ERROR("Failed to initialize cursor plane");
 413                 drm_plane_cleanup(&ldu->base.primary);
 414                 goto err_free;
 415         }
 416
 417         drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
 418
 419
 420         vmw_du_connector_reset(connector);
 421         ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 422                                  DRM_MODE_CONNECTOR_VIRTUAL);
 423         if (ret) {
 424                 DRM_ERROR("Failed to initialize connector\n");
 425                 goto err_free;
 426         }
 427
 428         drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
 429         connector->status = vmw_du_connector_detect(connector, true);
 430         vmw_connector_state_to_vcs(connector->state)->is_implicit = true;
 431
 432
 433         ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 434                                DRM_MODE_ENCODER_VIRTUAL, NULL);
 435         if (ret) {
 436                 DRM_ERROR("Failed to initialize encoder\n");
 437                 goto err_free_connector;
 438         }
 439
 440         (void) drm_connector_attach_encoder(connector, encoder);
 441         encoder->possible_crtcs = (1 << unit);
 442         encoder->possible_clones = 0;
 443
 444         ret = drm_connector_register(connector);
 445         if (ret) {
 446                 DRM_ERROR("Failed to register connector\n");
 447                 goto err_free_encoder;
 448         }
 449
 450
 451         vmw_du_crtc_reset(crtc);
 452         ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
 453                                         &ldu->base.cursor,
 454                                         &vmw_legacy_crtc_funcs, NULL);
 455         if (ret) {
 456                 DRM_ERROR("Failed to initialize CRTC\n");
 457                 goto err_free_unregister;
 458         }
 459
 460         drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
 461
 462         drm_mode_crtc_set_gamma_size(crtc, 256);
 463
 464         drm_object_attach_property(&connector->base,
 465                                    dev_priv->hotplug_mode_update_property, 1);
 466         drm_object_attach_property(&connector->base,
 467                                    dev->mode_config.suggested_x_property, 0);
 468         drm_object_attach_property(&connector->base,
 469                                    dev->mode_config.suggested_y_property, 0);
 470         if (dev_priv->implicit_placement_property)
 471                 drm_object_attach_property
 472                         (&connector->base,
 473                          dev_priv->implicit_placement_property,
 474                          1);
 475
 476         return 0;
 477
 478 err_free_unregister:
 479         drm_connector_unregister(connector);
 480 err_free_encoder:
 481         drm_encoder_cleanup(encoder);
 482 err_free_connector:
 483         drm_connector_cleanup(connector);
 484 err_free:
 485         kfree(ldu);
 486         return ret;
 487 }
 488
 489 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 490 {
 491         struct drm_device *dev = dev_priv->dev;
 492         int i, ret;
 493
 494         if (dev_priv->ldu_priv) {
 495                 DRM_INFO("ldu system already on\n");
 496                 return -EINVAL;
 497         }
 498
 499         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 500         if (!dev_priv->ldu_priv)
 501                 return -ENOMEM;
 502
 503         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 504         dev_priv->ldu_priv->num_active = 0;
 505         dev_priv->ldu_priv->last_num_active = 0;
 506         dev_priv->ldu_priv->fb = NULL;
 507
 508         /* for old hardware without multimon only enable one display */
 509         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 510                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 511         else
 512                 ret = drm_vblank_init(dev, 1);
 513         if (ret != 0)
 514                 goto err_free;
 515
 516         vmw_kms_create_implicit_placement_property(dev_priv, true);
 517
 518         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 519                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 520                         vmw_ldu_init(dev_priv, i);
 521         else
 522                 vmw_ldu_init(dev_priv, 0);
 523
 524         dev_priv->active_display_unit = vmw_du_legacy;
 525
 526         DRM_INFO("Legacy Display Unit initialized\n");
 527
 528         return 0;
 529
 530 err_free:
 531         kfree(dev_priv->ldu_priv);
 532         dev_priv->ldu_priv = NULL;
 533         return ret;
 534 }
 535
 536 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 537 {
 538         if (!dev_priv->ldu_priv)
 539                 return -ENOSYS;
 540
 541         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 542
 543         kfree(dev_priv->ldu_priv);
 544
 545         return 0;
 546 }
 547
 548
 549 int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
 550                             struct vmw_framebuffer *framebuffer,
 551                             unsigned int flags, unsigned int color,
 552                             struct drm_clip_rect *clips,
 553                             unsigned int num_clips, int increment)
 554 {
 555         size_t fifo_size;
 556         int i;
 557
 558         struct {
 559                 uint32_t header;
 560                 SVGAFifoCmdUpdate body;
 561         } *cmd;
 562
 563         fifo_size = sizeof(*cmd) * num_clips;
 564         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 565         if (unlikely(cmd == NULL)) {
 566                 DRM_ERROR("Fifo reserve failed.\n");
 567                 return -ENOMEM;
 568         }
 569
 570         memset(cmd, 0, fifo_size);
 571         for (i = 0; i < num_clips; i++, clips += increment) {
 572                 cmd[i].header = SVGA_CMD_UPDATE;
 573                 cmd[i].body.x = clips->x1;
 574                 cmd[i].body.y = clips->y1;
 575                 cmd[i].body.width = clips->x2 - clips->x1;
 576                 cmd[i].body.height = clips->y2 - clips->y1;
 577         }
 578
 579         vmw_fifo_commit(dev_priv, fifo_size);
 580         return 0;
 581 }