drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   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 = vmw_kms_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         .set_property = vmw_du_connector_set_property,
 267         .destroy = vmw_ldu_connector_destroy,
 268         .reset = vmw_du_connector_reset,
 269         .atomic_duplicate_state = vmw_du_connector_duplicate_state,
 270         .atomic_destroy_state = vmw_du_connector_destroy_state,
 271         .atomic_set_property = vmw_du_connector_atomic_set_property,
 272         .atomic_get_property = vmw_du_connector_atomic_get_property,
 273 };
 274
 275 static const struct
 276 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
 277         .best_encoder = drm_atomic_helper_best_encoder,
 278 };
 279
 280 /*
 281  * Legacy Display Plane Functions
 282  */
 283
 284 static void
 285 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
 286                                     struct drm_plane_state *old_state)
 287 {
 288         struct vmw_private *dev_priv;
 289         struct vmw_legacy_display_unit *ldu;
 290         struct vmw_framebuffer *vfb;
 291         struct drm_framebuffer *fb;
 292         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 293
 294
 295         ldu = vmw_crtc_to_ldu(crtc);
 296         dev_priv = vmw_priv(plane->dev);
 297         fb       = plane->state->fb;
 298
 299         vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
 300
 301         if (vfb)
 302                 vmw_ldu_add_active(dev_priv, ldu, vfb);
 303         else
 304                 vmw_ldu_del_active(dev_priv, ldu);
 305
 306         vmw_ldu_commit_list(dev_priv);
 307 }
 308
 309
 310 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
 311         .update_plane = drm_atomic_helper_update_plane,
 312         .disable_plane = drm_atomic_helper_disable_plane,
 313         .destroy = vmw_du_primary_plane_destroy,
 314         .reset = vmw_du_plane_reset,
 315         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 316         .atomic_destroy_state = vmw_du_plane_destroy_state,
 317 };
 318
 319 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
 320         .update_plane = drm_atomic_helper_update_plane,
 321         .disable_plane = drm_atomic_helper_disable_plane,
 322         .destroy = vmw_du_cursor_plane_destroy,
 323         .reset = vmw_du_plane_reset,
 324         .atomic_duplicate_state = vmw_du_plane_duplicate_state,
 325         .atomic_destroy_state = vmw_du_plane_destroy_state,
 326 };
 327
 328 /*
 329  * Atomic Helpers
 330  */
 331 static const struct
 332 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
 333         .atomic_check = vmw_du_cursor_plane_atomic_check,
 334         .atomic_update = vmw_du_cursor_plane_atomic_update,
 335         .prepare_fb = vmw_du_cursor_plane_prepare_fb,
 336         .cleanup_fb = vmw_du_plane_cleanup_fb,
 337 };
 338
 339 static const struct
 340 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
 341         .atomic_check = vmw_du_primary_plane_atomic_check,
 342         .atomic_update = vmw_ldu_primary_plane_atomic_update,
 343 };
 344
 345 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
 346         .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 347         .atomic_check = vmw_du_crtc_atomic_check,
 348         .atomic_begin = vmw_du_crtc_atomic_begin,
 349         .atomic_flush = vmw_du_crtc_atomic_flush,
 350         .atomic_enable = vmw_ldu_crtc_atomic_enable,
 351         .atomic_disable = vmw_ldu_crtc_atomic_disable,
 352 };
 353
 354
 355 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 356 {
 357         struct vmw_legacy_display_unit *ldu;
 358         struct drm_device *dev = dev_priv->dev;
 359         struct drm_connector *connector;
 360         struct drm_encoder *encoder;
 361         struct drm_plane *primary, *cursor;
 362         struct drm_crtc *crtc;
 363         int ret;
 364
 365         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 366         if (!ldu)
 367                 return -ENOMEM;
 368
 369         ldu->base.unit = unit;
 370         crtc = &ldu->base.crtc;
 371         encoder = &ldu->base.encoder;
 372         connector = &ldu->base.connector;
 373         primary = &ldu->base.primary;
 374         cursor = &ldu->base.cursor;
 375
 376         INIT_LIST_HEAD(&ldu->active);
 377
 378         ldu->base.pref_active = (unit == 0);
 379         ldu->base.pref_width = dev_priv->initial_width;
 380         ldu->base.pref_height = dev_priv->initial_height;
 381         ldu->base.pref_mode = NULL;
 382
 383         /*
 384          * Remove this after enabling atomic because property values can
 385          * only exist in a state object
 386          */
 387         ldu->base.is_implicit = true;
 388
 389         /* Initialize primary plane */
 390         vmw_du_plane_reset(primary);
 391
 392         ret = drm_universal_plane_init(dev, &ldu->base.primary,
 393                                        0, &vmw_ldu_plane_funcs,
 394                                        vmw_primary_plane_formats,
 395                                        ARRAY_SIZE(vmw_primary_plane_formats),
 396                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
 397         if (ret) {
 398                 DRM_ERROR("Failed to initialize primary plane");
 399                 goto err_free;
 400         }
 401
 402         drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
 403
 404         /* Initialize cursor plane */
 405         vmw_du_plane_reset(cursor);
 406
 407         ret = drm_universal_plane_init(dev, &ldu->base.cursor,
 408                         0, &vmw_ldu_cursor_funcs,
 409                         vmw_cursor_plane_formats,
 410                         ARRAY_SIZE(vmw_cursor_plane_formats),
 411                         NULL, DRM_PLANE_TYPE_CURSOR, NULL);
 412         if (ret) {
 413                 DRM_ERROR("Failed to initialize cursor plane");
 414                 drm_plane_cleanup(&ldu->base.primary);
 415                 goto err_free;
 416         }
 417
 418         drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
 419
 420
 421         vmw_du_connector_reset(connector);
 422         ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 423                                  DRM_MODE_CONNECTOR_VIRTUAL);
 424         if (ret) {
 425                 DRM_ERROR("Failed to initialize connector\n");
 426                 goto err_free;
 427         }
 428
 429         drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
 430         connector->status = vmw_du_connector_detect(connector, true);
 431         vmw_connector_state_to_vcs(connector->state)->is_implicit = true;
 432
 433
 434         ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 435                                DRM_MODE_ENCODER_VIRTUAL, NULL);
 436         if (ret) {
 437                 DRM_ERROR("Failed to initialize encoder\n");
 438                 goto err_free_connector;
 439         }
 440
 441         (void) drm_mode_connector_attach_encoder(connector, encoder);
 442         encoder->possible_crtcs = (1 << unit);
 443         encoder->possible_clones = 0;
 444
 445         ret = drm_connector_register(connector);
 446         if (ret) {
 447                 DRM_ERROR("Failed to register connector\n");
 448                 goto err_free_encoder;
 449         }
 450
 451
 452         vmw_du_crtc_reset(crtc);
 453         ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
 454                                         &ldu->base.cursor,
 455                                         &vmw_legacy_crtc_funcs, NULL);
 456         if (ret) {
 457                 DRM_ERROR("Failed to initialize CRTC\n");
 458                 goto err_free_unregister;
 459         }
 460
 461         drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
 462
 463         drm_mode_crtc_set_gamma_size(crtc, 256);
 464
 465         drm_object_attach_property(&connector->base,
 466                                    dev_priv->hotplug_mode_update_property, 1);
 467         drm_object_attach_property(&connector->base,
 468                                    dev->mode_config.suggested_x_property, 0);
 469         drm_object_attach_property(&connector->base,
 470                                    dev->mode_config.suggested_y_property, 0);
 471         if (dev_priv->implicit_placement_property)
 472                 drm_object_attach_property
 473                         (&connector->base,
 474                          dev_priv->implicit_placement_property,
 475                          1);
 476
 477         return 0;
 478
 479 err_free_unregister:
 480         drm_connector_unregister(connector);
 481 err_free_encoder:
 482         drm_encoder_cleanup(encoder);
 483 err_free_connector:
 484         drm_connector_cleanup(connector);
 485 err_free:
 486         kfree(ldu);
 487         return ret;
 488 }
 489
 490 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 491 {
 492         struct drm_device *dev = dev_priv->dev;
 493         int i, ret;
 494
 495         if (dev_priv->ldu_priv) {
 496                 DRM_INFO("ldu system already on\n");
 497                 return -EINVAL;
 498         }
 499
 500         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 501         if (!dev_priv->ldu_priv)
 502                 return -ENOMEM;
 503
 504         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 505         dev_priv->ldu_priv->num_active = 0;
 506         dev_priv->ldu_priv->last_num_active = 0;
 507         dev_priv->ldu_priv->fb = NULL;
 508
 509         /* for old hardware without multimon only enable one display */
 510         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 511                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 512         else
 513                 ret = drm_vblank_init(dev, 1);
 514         if (ret != 0)
 515                 goto err_free;
 516
 517         vmw_kms_create_implicit_placement_property(dev_priv, true);
 518
 519         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 520                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 521                         vmw_ldu_init(dev_priv, i);
 522         else
 523                 vmw_ldu_init(dev_priv, 0);
 524
 525         dev_priv->active_display_unit = vmw_du_legacy;
 526
 527         DRM_INFO("Legacy Display Unit initialized\n");
 528
 529         return 0;
 530
 531 err_free:
 532         kfree(dev_priv->ldu_priv);
 533         dev_priv->ldu_priv = NULL;
 534         return ret;
 535 }
 536
 537 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 538 {
 539         if (!dev_priv->ldu_priv)
 540                 return -ENOSYS;
 541
 542         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 543
 544         kfree(dev_priv->ldu_priv);
 545
 546         return 0;
 547 }
 548
 549
 550 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv,
 551                                 struct vmw_framebuffer *framebuffer,
 552                                 unsigned flags, unsigned color,
 553                                 struct drm_clip_rect *clips,
 554                                 unsigned num_clips, int increment)
 555 {
 556         size_t fifo_size;
 557         int i;
 558
 559         struct {
 560                 uint32_t header;
 561                 SVGAFifoCmdUpdate body;
 562         } *cmd;
 563
 564         fifo_size = sizeof(*cmd) * num_clips;
 565         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 566         if (unlikely(cmd == NULL)) {
 567                 DRM_ERROR("Fifo reserve failed.\n");
 568                 return -ENOMEM;
 569         }
 570
 571         memset(cmd, 0, fifo_size);
 572         for (i = 0; i < num_clips; i++, clips += increment) {
 573                 cmd[i].header = SVGA_CMD_UPDATE;
 574                 cmd[i].body.x = clips->x1;
 575                 cmd[i].body.y = clips->y1;
 576                 cmd[i].body.width = clips->x2 - clips->x1;
 577                 cmd[i].body.height = clips->y2 - clips->y1;
 578         }
 579
 580         vmw_fifo_commit(dev_priv, fifo_size);
 581         return 0;
 582 }