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 <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                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 129
 130                 i++;
 131         }
 132
 133         BUG_ON(i != lds->num_active);
 134
 135         lds->last_num_active = lds->num_active;
 136
 137         return 0;
 138 }
 139
 140 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 141                               struct vmw_legacy_display_unit *ldu)
 142 {
 143         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 144         if (list_empty(&ldu->active))
 145                 return 0;
 146
 147         /* Must init otherwise list_empty(&ldu->active) will not work. */
 148         list_del_init(&ldu->active);
 149         if (--(ld->num_active) == 0) {
 150                 BUG_ON(!ld->fb);
 151                 if (ld->fb->unpin)
 152                         ld->fb->unpin(ld->fb);
 153                 ld->fb = NULL;
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 160                               struct vmw_legacy_display_unit *ldu,
 161                               struct vmw_framebuffer *vfb)
 162 {
 163         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 164         struct vmw_legacy_display_unit *entry;
 165         struct list_head *at;
 166
 167         BUG_ON(!ld->num_active && ld->fb);
 168         if (vfb != ld->fb) {
 169                 if (ld->fb && ld->fb->unpin)
 170                         ld->fb->unpin(ld->fb);
 171                 vmw_svga_enable(vmw_priv);
 172                 if (vfb->pin)
 173                         vfb->pin(vfb);
 174                 ld->fb = vfb;
 175         }
 176
 177         if (!list_empty(&ldu->active))
 178                 return 0;
 179
 180         at = &ld->active;
 181         list_for_each_entry(entry, &ld->active, active) {
 182                 if (entry->base.unit > ldu->base.unit)
 183                         break;
 184
 185                 at = &entry->active;
 186         }
 187
 188         list_add(&ldu->active, at);
 189
 190         ld->num_active++;
 191
 192         return 0;
 193 }
 194
 195 /**
 196  * vmw_ldu_crtc_mode_set_nofb - Enable svga
 197  *
 198  * @crtc: CRTC associated with the new screen
 199  *
 200  * For LDU, just enable the svga
 201  */
 202 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 203 {
 204 }
 205
 206 /**
 207  * vmw_ldu_crtc_atomic_enable - Noop
 208  *
 209  * @crtc: CRTC associated with the new screen
 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  */
 226 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
 227                                         struct drm_atomic_state *state)
 228 {
 229 }
 230
 231 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 232         .gamma_set = vmw_du_crtc_gamma_set,
 233         .destroy = vmw_ldu_crtc_destroy,
 234         .reset = vmw_du_crtc_reset,
 235         .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
 236         .atomic_destroy_state = vmw_du_crtc_destroy_state,
 237         .set_config = drm_atomic_helper_set_config,
 238         .get_vblank_counter = vmw_get_vblank_counter,
 239         .enable_vblank = vmw_enable_vblank,
 240         .disable_vblank = vmw_disable_vblank,
 241 };
 242
 243
 244 /*
 245  * Legacy Display Unit encoder functions
 246  */
 247
 248 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 249 {
 250         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 251 }
 252
 253 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 254         .destroy = vmw_ldu_encoder_destroy,
 255 };
 256
 257 /*
 258  * Legacy Display Unit connector functions
 259  */
 260
 261 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 262 {
 263         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 264 }
 265
 266 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 267         .dpms = vmw_du_connector_dpms,
 268         .detect = vmw_du_connector_detect,
 269         .fill_modes = vmw_du_connector_fill_modes,
 270         .destroy = vmw_ldu_connector_destroy,
 271         .reset = vmw_du_connector_reset,
 272         .atomic_duplicate_state = vmw_du_connector_duplicate_state,
 273         .atomic_destroy_state = vmw_du_connector_destroy_state,
 274 };
 275
 276 static const struct
 277 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
 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         ret = drm_universal_plane_init(dev, &ldu->base.primary,
 391                                        0, &vmw_ldu_plane_funcs,
 392                                        vmw_primary_plane_formats,
 393                                        ARRAY_SIZE(vmw_primary_plane_formats),
 394                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
 395         if (ret) {
 396                 DRM_ERROR("Failed to initialize primary plane");
 397                 goto err_free;
 398         }
 399
 400         drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
 401
 402         /* Initialize cursor plane */
 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         ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 417                                  DRM_MODE_CONNECTOR_VIRTUAL);
 418         if (ret) {
 419                 DRM_ERROR("Failed to initialize connector\n");
 420                 goto err_free;
 421         }
 422
 423         drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
 424         connector->status = vmw_du_connector_detect(connector, true);
 425
 426         ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 427                                DRM_MODE_ENCODER_VIRTUAL, NULL);
 428         if (ret) {
 429                 DRM_ERROR("Failed to initialize encoder\n");
 430                 goto err_free_connector;
 431         }
 432
 433         (void) drm_connector_attach_encoder(connector, encoder);
 434         encoder->possible_crtcs = (1 << unit);
 435         encoder->possible_clones = 0;
 436
 437         ret = drm_connector_register(connector);
 438         if (ret) {
 439                 DRM_ERROR("Failed to register connector\n");
 440                 goto err_free_encoder;
 441         }
 442
 443         ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
 444                                         &ldu->base.cursor,
 445                                         &vmw_legacy_crtc_funcs, NULL);
 446         if (ret) {
 447                 DRM_ERROR("Failed to initialize CRTC\n");
 448                 goto err_free_unregister;
 449         }
 450
 451         drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
 452
 453         drm_mode_crtc_set_gamma_size(crtc, 256);
 454
 455         drm_object_attach_property(&connector->base,
 456                                    dev_priv->hotplug_mode_update_property, 1);
 457         drm_object_attach_property(&connector->base,
 458                                    dev->mode_config.suggested_x_property, 0);
 459         drm_object_attach_property(&connector->base,
 460                                    dev->mode_config.suggested_y_property, 0);
 461         if (dev_priv->implicit_placement_property)
 462                 drm_object_attach_property
 463                         (&connector->base,
 464                          dev_priv->implicit_placement_property,
 465                          1);
 466
 467         return 0;
 468
 469 err_free_unregister:
 470         drm_connector_unregister(connector);
 471 err_free_encoder:
 472         drm_encoder_cleanup(encoder);
 473 err_free_connector:
 474         drm_connector_cleanup(connector);
 475 err_free:
 476         kfree(ldu);
 477         return ret;
 478 }
 479
 480 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 481 {
 482         struct drm_device *dev = dev_priv->dev;
 483         int i, ret;
 484
 485         if (dev_priv->ldu_priv) {
 486                 DRM_INFO("ldu system already on\n");
 487                 return -EINVAL;
 488         }
 489
 490         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 491         if (!dev_priv->ldu_priv)
 492                 return -ENOMEM;
 493
 494         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 495         dev_priv->ldu_priv->num_active = 0;
 496         dev_priv->ldu_priv->last_num_active = 0;
 497         dev_priv->ldu_priv->fb = NULL;
 498
 499         /* for old hardware without multimon only enable one display */
 500         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 501                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 502         else
 503                 ret = drm_vblank_init(dev, 1);
 504         if (ret != 0)
 505                 goto err_free;
 506
 507         vmw_kms_create_implicit_placement_property(dev_priv);
 508
 509         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 510                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 511                         vmw_ldu_init(dev_priv, i);
 512         else
 513                 vmw_ldu_init(dev_priv, 0);
 514
 515         dev_priv->active_display_unit = vmw_du_legacy;
 516
 517         drm_mode_config_reset(dev);
 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 }