kernel/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2011 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
  31
  32 #define vmw_crtc_to_sou(x) \
  33         container_of(x, struct vmw_screen_object_unit, base.crtc)
  34 #define vmw_encoder_to_sou(x) \
  35         container_of(x, struct vmw_screen_object_unit, base.encoder)
  36 #define vmw_connector_to_sou(x) \
  37         container_of(x, struct vmw_screen_object_unit, base.connector)
  38
  39 struct vmw_screen_object_display {
  40         unsigned num_implicit;
  41
  42         struct vmw_framebuffer *implicit_fb;
  43 };
  44
  45 /**
  46  * Display unit using screen objects.
  47  */
  48 struct vmw_screen_object_unit {
  49         struct vmw_display_unit base;
  50
  51         unsigned long buffer_size; /**< Size of allocated buffer */
  52         struct vmw_dma_buffer *buffer; /**< Backing store buffer */
  53
  54         bool defined;
  55         bool active_implicit;
  56 };
  57
  58 static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
  59 {
  60         vmw_display_unit_cleanup(&sou->base);
  61         kfree(sou);
  62 }
  63
  64
  65 /*
  66  * Screen Object Display Unit CRTC functions
  67  */
  68
  69 static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
  70 {
  71         vmw_sou_destroy(vmw_crtc_to_sou(crtc));
  72 }
  73
  74 static void vmw_sou_del_active(struct vmw_private *vmw_priv,
  75                               struct vmw_screen_object_unit *sou)
  76 {
  77         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
  78
  79         if (sou->active_implicit) {
  80                 if (--(ld->num_implicit) == 0)
  81                         ld->implicit_fb = NULL;
  82                 sou->active_implicit = false;
  83         }
  84 }
  85
  86 static void vmw_sou_add_active(struct vmw_private *vmw_priv,
  87                               struct vmw_screen_object_unit *sou,
  88                               struct vmw_framebuffer *vfb)
  89 {
  90         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
  91
  92         BUG_ON(!ld->num_implicit && ld->implicit_fb);
  93
  94         if (!sou->active_implicit && sou->base.is_implicit) {
  95                 ld->implicit_fb = vfb;
  96                 sou->active_implicit = true;
  97                 ld->num_implicit++;
  98         }
  99 }
 100
 101 /**
 102  * Send the fifo command to create a screen.
 103  */
 104 static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
 105                                struct vmw_screen_object_unit *sou,
 106                                uint32_t x, uint32_t y,
 107                                struct drm_display_mode *mode)
 108 {
 109         size_t fifo_size;
 110
 111         struct {
 112                 struct {
 113                         uint32_t cmdType;
 114                 } header;
 115                 SVGAScreenObject obj;
 116         } *cmd;
 117
 118         BUG_ON(!sou->buffer);
 119
 120         fifo_size = sizeof(*cmd);
 121         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 122         /* The hardware has hung, nothing we can do about it here. */
 123         if (unlikely(cmd == NULL)) {
 124                 DRM_ERROR("Fifo reserve failed.\n");
 125                 return -ENOMEM;
 126         }
 127
 128         memset(cmd, 0, fifo_size);
 129         cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
 130         cmd->obj.structSize = sizeof(SVGAScreenObject);
 131         cmd->obj.id = sou->base.unit;
 132         cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
 133                 (sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
 134         cmd->obj.size.width = mode->hdisplay;
 135         cmd->obj.size.height = mode->vdisplay;
 136         if (sou->base.is_implicit) {
 137                 cmd->obj.root.x = x;
 138                 cmd->obj.root.y = y;
 139         } else {
 140                 cmd->obj.root.x = sou->base.gui_x;
 141                 cmd->obj.root.y = sou->base.gui_y;
 142         }
 143
 144         /* Ok to assume that buffer is pinned in vram */
 145         vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
 146         cmd->obj.backingStore.pitch = mode->hdisplay * 4;
 147
 148         vmw_fifo_commit(dev_priv, fifo_size);
 149
 150         sou->defined = true;
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * Send the fifo command to destroy a screen.
 157  */
 158 static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
 159                                 struct vmw_screen_object_unit *sou)
 160 {
 161         size_t fifo_size;
 162         int ret;
 163
 164         struct {
 165                 struct {
 166                         uint32_t cmdType;
 167                 } header;
 168                 SVGAFifoCmdDestroyScreen body;
 169         } *cmd;
 170
 171         /* no need to do anything */
 172         if (unlikely(!sou->defined))
 173                 return 0;
 174
 175         fifo_size = sizeof(*cmd);
 176         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 177         /* the hardware has hung, nothing we can do about it here */
 178         if (unlikely(cmd == NULL)) {
 179                 DRM_ERROR("Fifo reserve failed.\n");
 180                 return -ENOMEM;
 181         }
 182
 183         memset(cmd, 0, fifo_size);
 184         cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
 185         cmd->body.screenId = sou->base.unit;
 186
 187         vmw_fifo_commit(dev_priv, fifo_size);
 188
 189         /* Force sync */
 190         ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
 191         if (unlikely(ret != 0))
 192                 DRM_ERROR("Failed to sync with HW");
 193         else
 194                 sou->defined = false;
 195
 196         return ret;
 197 }
 198
 199 /**
 200  * Free the backing store.
 201  */
 202 static void vmw_sou_backing_free(struct vmw_private *dev_priv,
 203                                  struct vmw_screen_object_unit *sou)
 204 {
 205         struct ttm_buffer_object *bo;
 206
 207         if (unlikely(sou->buffer == NULL))
 208                 return;
 209
 210         bo = &sou->buffer->base;
 211         ttm_bo_unref(&bo);
 212         sou->buffer = NULL;
 213         sou->buffer_size = 0;
 214 }
 215
 216 /**
 217  * Allocate the backing store for the buffer.
 218  */
 219 static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
 220                                  struct vmw_screen_object_unit *sou,
 221                                  unsigned long size)
 222 {
 223         int ret;
 224
 225         if (sou->buffer_size == size)
 226                 return 0;
 227
 228         if (sou->buffer)
 229                 vmw_sou_backing_free(dev_priv, sou);
 230
 231         sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
 232         if (unlikely(sou->buffer == NULL))
 233                 return -ENOMEM;
 234
 235         /* After we have alloced the backing store might not be able to
 236          * resume the overlays, this is preferred to failing to alloc.
 237          */
 238         vmw_overlay_pause_all(dev_priv);
 239         ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
 240                               &vmw_vram_ne_placement,
 241                               false, &vmw_dmabuf_bo_free);
 242         vmw_overlay_resume_all(dev_priv);
 243
 244         if (unlikely(ret != 0))
 245                 sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
 246         else
 247                 sou->buffer_size = size;
 248
 249         return ret;
 250 }
 251
 252 static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
 253 {
 254         struct vmw_private *dev_priv;
 255         struct vmw_screen_object_unit *sou;
 256         struct drm_connector *connector;
 257         struct drm_display_mode *mode;
 258         struct drm_encoder *encoder;
 259         struct vmw_framebuffer *vfb;
 260         struct drm_framebuffer *fb;
 261         struct drm_crtc *crtc;
 262         int ret = 0;
 263
 264         if (!set)
 265                 return -EINVAL;
 266
 267         if (!set->crtc)
 268                 return -EINVAL;
 269
 270         /* get the sou */
 271         crtc = set->crtc;
 272         sou = vmw_crtc_to_sou(crtc);
 273         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 274         dev_priv = vmw_priv(crtc->dev);
 275
 276         if (set->num_connectors > 1) {
 277                 DRM_ERROR("to many connectors\n");
 278                 return -EINVAL;
 279         }
 280
 281         if (set->num_connectors == 1 &&
 282             set->connectors[0] != &sou->base.connector) {
 283                 DRM_ERROR("connector doesn't match %p %p\n",
 284                         set->connectors[0], &sou->base.connector);
 285                 return -EINVAL;
 286         }
 287
 288         /* sou only supports one fb active at the time */
 289         if (sou->base.is_implicit &&
 290             dev_priv->sou_priv->implicit_fb && vfb &&
 291             !(dev_priv->sou_priv->num_implicit == 1 &&
 292               sou->active_implicit) &&
 293             dev_priv->sou_priv->implicit_fb != vfb) {
 294                 DRM_ERROR("Multiple framebuffers not supported\n");
 295                 return -EINVAL;
 296         }
 297
 298         /* since they always map one to one these are safe */
 299         connector = &sou->base.connector;
 300         encoder = &sou->base.encoder;
 301
 302         /* should we turn the crtc off */
 303         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 304                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 305                 /* the hardware has hung don't do anything more */
 306                 if (unlikely(ret != 0))
 307                         return ret;
 308
 309                 connector->encoder = NULL;
 310                 encoder->crtc = NULL;
 311                 crtc->primary->fb = NULL;
 312                 crtc->x = 0;
 313                 crtc->y = 0;
 314                 crtc->enabled = false;
 315
 316                 vmw_sou_del_active(dev_priv, sou);
 317
 318                 vmw_sou_backing_free(dev_priv, sou);
 319
 320                 return 0;
 321         }
 322
 323
 324         /* we now know we want to set a mode */
 325         mode = set->mode;
 326         fb = set->fb;
 327
 328         if (set->x + mode->hdisplay > fb->width ||
 329             set->y + mode->vdisplay > fb->height) {
 330                 DRM_ERROR("set outside of framebuffer\n");
 331                 return -EINVAL;
 332         }
 333
 334         vmw_fb_off(dev_priv);
 335
 336         if (mode->hdisplay != crtc->mode.hdisplay ||
 337             mode->vdisplay != crtc->mode.vdisplay) {
 338                 /* no need to check if depth is different, because backing
 339                  * store depth is forced to 4 by the device.
 340                  */
 341
 342                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 343                 /* the hardware has hung don't do anything more */
 344                 if (unlikely(ret != 0))
 345                         return ret;
 346
 347                 vmw_sou_backing_free(dev_priv, sou);
 348         }
 349
 350         if (!sou->buffer) {
 351                 /* forced to depth 4 by the device */
 352                 size_t size = mode->hdisplay * mode->vdisplay * 4;
 353                 ret = vmw_sou_backing_alloc(dev_priv, sou, size);
 354                 if (unlikely(ret != 0))
 355                         return ret;
 356         }
 357
 358         ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
 359         if (unlikely(ret != 0)) {
 360                 /*
 361                  * We are in a bit of a situation here, the hardware has
 362                  * hung and we may or may not have a buffer hanging of
 363                  * the screen object, best thing to do is not do anything
 364                  * if we where defined, if not just turn the crtc of.
 365                  * Not what userspace wants but it needs to htfu.
 366                  */
 367                 if (sou->defined)
 368                         return ret;
 369
 370                 connector->encoder = NULL;
 371                 encoder->crtc = NULL;
 372                 crtc->primary->fb = NULL;
 373                 crtc->x = 0;
 374                 crtc->y = 0;
 375                 crtc->enabled = false;
 376
 377                 return ret;
 378         }
 379
 380         vmw_sou_add_active(dev_priv, sou, vfb);
 381
 382         connector->encoder = encoder;
 383         encoder->crtc = crtc;
 384         crtc->mode = *mode;
 385         crtc->primary->fb = fb;
 386         crtc->x = set->x;
 387         crtc->y = set->y;
 388         crtc->enabled = true;
 389
 390         return 0;
 391 }
 392
 393 static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
 394         .save = vmw_du_crtc_save,
 395         .restore = vmw_du_crtc_restore,
 396         .cursor_set = vmw_du_crtc_cursor_set,
 397         .cursor_move = vmw_du_crtc_cursor_move,
 398         .gamma_set = vmw_du_crtc_gamma_set,
 399         .destroy = vmw_sou_crtc_destroy,
 400         .set_config = vmw_sou_crtc_set_config,
 401         .page_flip = vmw_du_page_flip,
 402 };
 403
 404 /*
 405  * Screen Object Display Unit encoder functions
 406  */
 407
 408 static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
 409 {
 410         vmw_sou_destroy(vmw_encoder_to_sou(encoder));
 411 }
 412
 413 static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
 414         .destroy = vmw_sou_encoder_destroy,
 415 };
 416
 417 /*
 418  * Screen Object Display Unit connector functions
 419  */
 420
 421 static void vmw_sou_connector_destroy(struct drm_connector *connector)
 422 {
 423         vmw_sou_destroy(vmw_connector_to_sou(connector));
 424 }
 425
 426 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 427         .dpms = vmw_du_connector_dpms,
 428         .save = vmw_du_connector_save,
 429         .restore = vmw_du_connector_restore,
 430         .detect = vmw_du_connector_detect,
 431         .fill_modes = vmw_du_connector_fill_modes,
 432         .set_property = vmw_du_connector_set_property,
 433         .destroy = vmw_sou_connector_destroy,
 434 };
 435
 436 static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 437 {
 438         struct vmw_screen_object_unit *sou;
 439         struct drm_device *dev = dev_priv->dev;
 440         struct drm_connector *connector;
 441         struct drm_encoder *encoder;
 442         struct drm_crtc *crtc;
 443
 444         sou = kzalloc(sizeof(*sou), GFP_KERNEL);
 445         if (!sou)
 446                 return -ENOMEM;
 447
 448         sou->base.unit = unit;
 449         crtc = &sou->base.crtc;
 450         encoder = &sou->base.encoder;
 451         connector = &sou->base.connector;
 452
 453         sou->active_implicit = false;
 454
 455         sou->base.pref_active = (unit == 0);
 456         sou->base.pref_width = dev_priv->initial_width;
 457         sou->base.pref_height = dev_priv->initial_height;
 458         sou->base.pref_mode = NULL;
 459         sou->base.is_implicit = true;
 460
 461         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 462                            DRM_MODE_CONNECTOR_VIRTUAL);
 463         connector->status = vmw_du_connector_detect(connector, true);
 464
 465         drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
 466                          DRM_MODE_ENCODER_VIRTUAL);
 467         drm_mode_connector_attach_encoder(connector, encoder);
 468         encoder->possible_crtcs = (1 << unit);
 469         encoder->possible_clones = 0;
 470
 471         (void) drm_connector_register(connector);
 472
 473         drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
 474
 475         drm_mode_crtc_set_gamma_size(crtc, 256);
 476
 477         drm_object_attach_property(&connector->base,
 478                                       dev->mode_config.dirty_info_property,
 479                                       1);
 480
 481         return 0;
 482 }
 483
 484 int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
 485 {
 486         struct drm_device *dev = dev_priv->dev;
 487         int i, ret;
 488
 489         if (dev_priv->sou_priv) {
 490                 DRM_INFO("sou system already on\n");
 491                 return -EINVAL;
 492         }
 493
 494         if (!(dev_priv->capabilities & SVGA_CAP_SCREEN_OBJECT_2)) {
 495                 DRM_INFO("Not using screen objects,"
 496                          " missing cap SCREEN_OBJECT_2\n");
 497                 return -ENOSYS;
 498         }
 499
 500         ret = -ENOMEM;
 501         dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
 502         if (unlikely(!dev_priv->sou_priv))
 503                 goto err_no_mem;
 504
 505         dev_priv->sou_priv->num_implicit = 0;
 506         dev_priv->sou_priv->implicit_fb = NULL;
 507
 508         ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 509         if (unlikely(ret != 0))
 510                 goto err_free;
 511
 512         ret = drm_mode_create_dirty_info_property(dev);
 513         if (unlikely(ret != 0))
 514                 goto err_vblank_cleanup;
 515
 516         for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 517                 vmw_sou_init(dev_priv, i);
 518
 519         DRM_INFO("Screen objects system initialized\n");
 520
 521         return 0;
 522
 523 err_vblank_cleanup:
 524         drm_vblank_cleanup(dev);
 525 err_free:
 526         kfree(dev_priv->sou_priv);
 527         dev_priv->sou_priv = NULL;
 528 err_no_mem:
 529         return ret;
 530 }
 531
 532 int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
 533 {
 534         struct drm_device *dev = dev_priv->dev;
 535
 536         if (!dev_priv->sou_priv)
 537                 return -ENOSYS;
 538
 539         drm_vblank_cleanup(dev);
 540
 541         kfree(dev_priv->sou_priv);
 542
 543         return 0;
 544 }
 545
 546 /**
 547  * Returns if this unit can be page flipped.
 548  * Must be called with the mode_config mutex held.
 549  */
 550 bool vmw_kms_screen_object_flippable(struct vmw_private *dev_priv,
 551                                      struct drm_crtc *crtc)
 552 {
 553         struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
 554
 555         if (!sou->base.is_implicit)
 556                 return true;
 557
 558         if (dev_priv->sou_priv->num_implicit != 1)
 559                 return false;
 560
 561         return true;
 562 }
 563
 564 /**
 565  * Update the implicit fb to the current fb of this crtc.
 566  * Must be called with the mode_config mutex held.
 567  */
 568 void vmw_kms_screen_object_update_implicit_fb(struct vmw_private *dev_priv,
 569                                               struct drm_crtc *crtc)
 570 {
 571         struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
 572
 573         BUG_ON(!sou->base.is_implicit);
 574
 575         dev_priv->sou_priv->implicit_fb =
 576                 vmw_framebuffer_to_vfb(sou->base.crtc.primary->fb);
 577 }