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