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 = 0;
  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                         i++;
  94                 }
  95
  96                 if (crtc == NULL)
  97                         return 0;
  98                 fb = entry->base.crtc.primary->state->fb;
  99
 100                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
 101                                           fb->format->cpp[0] * 8,
 102                                           fb->format->depth);
 103         }
 104
 105         if (!list_empty(&lds->active)) {
 106                 entry = list_entry(lds->active.next, typeof(*entry), active);
 107                 fb = entry->base.crtc.primary->state->fb;
 108
 109                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 110                                    fb->format->cpp[0] * 8, fb->format->depth);
 111         }
 112
 113         /* Make sure we always show something. */
 114         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 115                   lds->num_active ? lds->num_active : 1);
 116
 117         i = 0;
 118         list_for_each_entry(entry, &lds->active, active) {
 119                 crtc = &entry->base.crtc;
 120
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 125                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 126                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 127                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 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  *
 210  * This is called after a mode set has been completed.  Here's
 211  * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
 212  * but since for LDU the display plane is closely tied to the
 213  * CRTC, it makes more sense to do those at plane update time.
 214  */
 215 static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
 216                                        struct drm_crtc_state *old_state)
 217 {
 218 }
 219
 220 /**
 221  * vmw_ldu_crtc_atomic_disable - Turns off CRTC
 222  *
 223  * @crtc: CRTC to be turned off
 224  */
 225 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
 226                                         struct drm_crtc_state *old_state)
 227 {
 228 }
 229
 230 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 231         .gamma_set = vmw_du_crtc_gamma_set,
 232         .destroy = vmw_ldu_crtc_destroy,
 233         .reset = vmw_du_crtc_reset,
 234         .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
 235         .atomic_destroy_state = vmw_du_crtc_destroy_state,
 236         .set_config = drm_atomic_helper_set_config,
 237 };
 238
 239
 240 /*
 241  * Legacy Display Unit encoder functions
 242  */
 243
 244 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 245 {
 246         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 247 }
 248
 249 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 250         .destroy = vmw_ldu_encoder_destroy,
 251 };
 252
 253 /*
 254  * Legacy Display Unit connector functions
 255  */
 256
 257 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 258 {
 259         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 260 }
 261
 262 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 263         .dpms = vmw_du_connector_dpms,
 264         .detect = vmw_du_connector_detect,
 265         .fill_modes = vmw_du_connector_fill_modes,
 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 };
 271
 272 static const struct
 273 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
 274 };
 275
 276 /*
 277  * Legacy Display Plane Functions
 278  */
 279
 280 static void
 281 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
 282                                     struct drm_plane_state *old_state)
 283 {
 284         struct vmw_private *dev_priv;
 285         struct vmw_legacy_display_unit *ldu;
 286         struct vmw_framebuffer *vfb;
 287         struct drm_framebuffer *fb;
 288         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 289
 290
 291         ldu = vmw_crtc_to_ldu(crtc);
 292         dev_priv = vmw_priv(plane->dev);
 293         fb       = plane->state->fb;
 294
 295         vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
 296
 297         if (vfb)
 298                 vmw_ldu_add_active(dev_priv, ldu, vfb);
 299         else
 300                 vmw_ldu_del_active(dev_priv, ldu);
 301
 302         vmw_ldu_commit_list(dev_priv);
 303 }
 304
 305
 306 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
 307         .update_plane = drm_atomic_helper_update_plane,
 308         .disable_plane = drm_atomic_helper_disable_plane,
 309         .destroy = vmw_du_primary_plane_destroy,
 310         .reset = vmw_du_plane_reset,
 311         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 312         .atomic_destroy_state = vmw_du_plane_destroy_state,
 313 };
 314
 315 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
 316         .update_plane = drm_atomic_helper_update_plane,
 317         .disable_plane = drm_atomic_helper_disable_plane,
 318         .destroy = vmw_du_cursor_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 /*
 325  * Atomic Helpers
 326  */
 327 static const struct
 328 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
 329         .atomic_check = vmw_du_cursor_plane_atomic_check,
 330         .atomic_update = vmw_du_cursor_plane_atomic_update,
 331         .prepare_fb = vmw_du_cursor_plane_prepare_fb,
 332         .cleanup_fb = vmw_du_plane_cleanup_fb,
 333 };
 334
 335 static const struct
 336 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
 337         .atomic_check = vmw_du_primary_plane_atomic_check,
 338         .atomic_update = vmw_ldu_primary_plane_atomic_update,
 339 };
 340
 341 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
 342         .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 343         .atomic_check = vmw_du_crtc_atomic_check,
 344         .atomic_begin = vmw_du_crtc_atomic_begin,
 345         .atomic_flush = vmw_du_crtc_atomic_flush,
 346         .atomic_enable = vmw_ldu_crtc_atomic_enable,
 347         .atomic_disable = vmw_ldu_crtc_atomic_disable,
 348 };
 349
 350
 351 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 352 {
 353         struct vmw_legacy_display_unit *ldu;
 354         struct drm_device *dev = dev_priv->dev;
 355         struct drm_connector *connector;
 356         struct drm_encoder *encoder;
 357         struct drm_plane *primary, *cursor;
 358         struct drm_crtc *crtc;
 359         int ret;
 360
 361         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 362         if (!ldu)
 363                 return -ENOMEM;
 364
 365         ldu->base.unit = unit;
 366         crtc = &ldu->base.crtc;
 367         encoder = &ldu->base.encoder;
 368         connector = &ldu->base.connector;
 369         primary = &ldu->base.primary;
 370         cursor = &ldu->base.cursor;
 371
 372         INIT_LIST_HEAD(&ldu->active);
 373
 374         ldu->base.pref_active = (unit == 0);
 375         ldu->base.pref_width = dev_priv->initial_width;
 376         ldu->base.pref_height = dev_priv->initial_height;
 377         ldu->base.pref_mode = NULL;
 378
 379         /*
 380          * Remove this after enabling atomic because property values can
 381          * only exist in a state object
 382          */
 383         ldu->base.is_implicit = true;
 384
 385         /* Initialize primary plane */
 386         vmw_du_plane_reset(primary);
 387
 388         ret = drm_universal_plane_init(dev, &ldu->base.primary,
 389                                        0, &vmw_ldu_plane_funcs,
 390                                        vmw_primary_plane_formats,
 391                                        ARRAY_SIZE(vmw_primary_plane_formats),
 392                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
 393         if (ret) {
 394                 DRM_ERROR("Failed to initialize primary plane");
 395                 goto err_free;
 396         }
 397
 398         drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
 399
 400         /* Initialize cursor plane */
 401         vmw_du_plane_reset(cursor);
 402
 403         ret = drm_universal_plane_init(dev, &ldu->base.cursor,
 404                         0, &vmw_ldu_cursor_funcs,
 405                         vmw_cursor_plane_formats,
 406                         ARRAY_SIZE(vmw_cursor_plane_formats),
 407                         NULL, DRM_PLANE_TYPE_CURSOR, NULL);
 408         if (ret) {
 409                 DRM_ERROR("Failed to initialize cursor plane");
 410                 drm_plane_cleanup(&ldu->base.primary);
 411                 goto err_free;
 412         }
 413
 414         drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
 415
 416         vmw_du_connector_reset(connector);
 417         ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 418                                  DRM_MODE_CONNECTOR_VIRTUAL);
 419         if (ret) {
 420                 DRM_ERROR("Failed to initialize connector\n");
 421                 goto err_free;
 422         }
 423
 424         drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
 425         connector->status = vmw_du_connector_detect(connector, true);
 426
 427         ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 428                                DRM_MODE_ENCODER_VIRTUAL, NULL);
 429         if (ret) {
 430                 DRM_ERROR("Failed to initialize encoder\n");
 431                 goto err_free_connector;
 432         }
 433
 434         (void) drm_connector_attach_encoder(connector, encoder);
 435         encoder->possible_crtcs = (1 << unit);
 436         encoder->possible_clones = 0;
 437
 438         ret = drm_connector_register(connector);
 439         if (ret) {
 440                 DRM_ERROR("Failed to register connector\n");
 441                 goto err_free_encoder;
 442         }
 443
 444         vmw_du_crtc_reset(crtc);
 445         ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
 446                                         &ldu->base.cursor,
 447                                         &vmw_legacy_crtc_funcs, NULL);
 448         if (ret) {
 449                 DRM_ERROR("Failed to initialize CRTC\n");
 450                 goto err_free_unregister;
 451         }
 452
 453         drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
 454
 455         drm_mode_crtc_set_gamma_size(crtc, 256);
 456
 457         drm_object_attach_property(&connector->base,
 458                                    dev_priv->hotplug_mode_update_property, 1);
 459         drm_object_attach_property(&connector->base,
 460                                    dev->mode_config.suggested_x_property, 0);
 461         drm_object_attach_property(&connector->base,
 462                                    dev->mode_config.suggested_y_property, 0);
 463         if (dev_priv->implicit_placement_property)
 464                 drm_object_attach_property
 465                         (&connector->base,
 466                          dev_priv->implicit_placement_property,
 467                          1);
 468
 469         return 0;
 470
 471 err_free_unregister:
 472         drm_connector_unregister(connector);
 473 err_free_encoder:
 474         drm_encoder_cleanup(encoder);
 475 err_free_connector:
 476         drm_connector_cleanup(connector);
 477 err_free:
 478         kfree(ldu);
 479         return ret;
 480 }
 481
 482 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 483 {
 484         struct drm_device *dev = dev_priv->dev;
 485         int i, ret;
 486
 487         if (dev_priv->ldu_priv) {
 488                 DRM_INFO("ldu system already on\n");
 489                 return -EINVAL;
 490         }
 491
 492         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 493         if (!dev_priv->ldu_priv)
 494                 return -ENOMEM;
 495
 496         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 497         dev_priv->ldu_priv->num_active = 0;
 498         dev_priv->ldu_priv->last_num_active = 0;
 499         dev_priv->ldu_priv->fb = NULL;
 500
 501         /* for old hardware without multimon only enable one display */
 502         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 503                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 504         else
 505                 ret = drm_vblank_init(dev, 1);
 506         if (ret != 0)
 507                 goto err_free;
 508
 509         vmw_kms_create_implicit_placement_property(dev_priv);
 510
 511         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 512                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 513                         vmw_ldu_init(dev_priv, i);
 514         else
 515                 vmw_ldu_init(dev_priv, 0);
 516
 517         dev_priv->active_display_unit = vmw_du_legacy;
 518
 519         DRM_INFO("Legacy Display Unit initialized\n");
 520
 521         return 0;
 522
 523 err_free:
 524         kfree(dev_priv->ldu_priv);
 525         dev_priv->ldu_priv = NULL;
 526         return ret;
 527 }
 528
 529 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 530 {
 531         if (!dev_priv->ldu_priv)
 532                 return -ENOSYS;
 533
 534         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 535
 536         kfree(dev_priv->ldu_priv);
 537
 538         return 0;
 539 }
 540
 541
 542 int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
 543                             struct vmw_framebuffer *framebuffer,
 544                             unsigned int flags, unsigned int color,
 545                             struct drm_clip_rect *clips,
 546                             unsigned int num_clips, int increment)
 547 {
 548         size_t fifo_size;
 549         int i;
 550
 551         struct {
 552                 uint32_t header;
 553                 SVGAFifoCmdUpdate body;
 554         } *cmd;
 555
 556         fifo_size = sizeof(*cmd) * num_clips;
 557         cmd = VMW_FIFO_RESERVE(dev_priv, fifo_size);
 558         if (unlikely(cmd == NULL))
 559                 return -ENOMEM;
 560
 561         memset(cmd, 0, fifo_size);
 562         for (i = 0; i < num_clips; i++, clips += increment) {
 563                 cmd[i].header = SVGA_CMD_UPDATE;
 564                 cmd[i].body.x = clips->x1;
 565                 cmd[i].body.y = clips->y1;
 566                 cmd[i].body.width = clips->x2 - clips->x1;
 567                 cmd[i].body.height = clips->y2 - clips->y1;
 568         }
 569
 570         vmw_fifo_commit(dev_priv, fifo_size);
 571         return 0;
 572 }