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
  30
  31 #define vmw_crtc_to_sou(x) \
  32         container_of(x, struct vmw_screen_object_unit, base.crtc)
  33 #define vmw_encoder_to_sou(x) \
  34         container_of(x, struct vmw_screen_object_unit, base.encoder)
  35 #define vmw_connector_to_sou(x) \
  36         container_of(x, struct vmw_screen_object_unit, base.connector)
  37
  38 struct vmw_screen_object_display {
  39         unsigned num_implicit;
  40
  41         struct vmw_framebuffer *implicit_fb;
  42 };
  43
  44 /**
  45  * Display unit using screen objects.
  46  */
  47 struct vmw_screen_object_unit {
  48         struct vmw_display_unit base;
  49
  50         unsigned long buffer_size; /**< Size of allocated buffer */
  51         struct vmw_dma_buffer *buffer; /**< Backing store buffer */
  52
  53         bool defined;
  54         bool active_implicit;
  55 };
  56
  57 static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
  58 {
  59         vmw_display_unit_cleanup(&sou->base);
  60         kfree(sou);
  61 }
  62
  63
  64 /*
  65  * Screen Object Display Unit CRTC functions
  66  */
  67
  68 static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
  69 {
  70         vmw_sou_destroy(vmw_crtc_to_sou(crtc));
  71 }
  72
  73 static void vmw_sou_del_active(struct vmw_private *vmw_priv,
  74                               struct vmw_screen_object_unit *sou)
  75 {
  76         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
  77
  78         if (sou->active_implicit) {
  79                 if (--(ld->num_implicit) == 0)
  80                         ld->implicit_fb = NULL;
  81                 sou->active_implicit = false;
  82         }
  83 }
  84
  85 static void vmw_sou_add_active(struct vmw_private *vmw_priv,
  86                               struct vmw_screen_object_unit *sou,
  87                               struct vmw_framebuffer *vfb)
  88 {
  89         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
  90
  91         BUG_ON(!ld->num_implicit && ld->implicit_fb);
  92
  93         if (!sou->active_implicit && sou->base.is_implicit) {
  94                 ld->implicit_fb = vfb;
  95                 sou->active_implicit = true;
  96                 ld->num_implicit++;
  97         }
  98 }
  99
 100 /**
 101  * Send the fifo command to create a screen.
 102  */
 103 static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
 104                                struct vmw_screen_object_unit *sou,
 105                                uint32_t x, uint32_t y,
 106                                struct drm_display_mode *mode)
 107 {
 108         size_t fifo_size;
 109
 110         struct {
 111                 struct {
 112                         uint32_t cmdType;
 113                 } header;
 114                 SVGAScreenObject obj;
 115         } *cmd;
 116
 117         BUG_ON(!sou->buffer);
 118
 119         fifo_size = sizeof(*cmd);
 120         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 121         /* The hardware has hung, nothing we can do about it here. */
 122         if (unlikely(cmd == NULL)) {
 123                 DRM_ERROR("Fifo reserve failed.\n");
 124                 return -ENOMEM;
 125         }
 126
 127         memset(cmd, 0, fifo_size);
 128         cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
 129         cmd->obj.structSize = sizeof(SVGAScreenObject);
 130         cmd->obj.id = sou->base.unit;
 131         cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
 132                 (sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
 133         cmd->obj.size.width = mode->hdisplay;
 134         cmd->obj.size.height = mode->vdisplay;
 135         if (sou->base.is_implicit) {
 136                 cmd->obj.root.x = x;
 137                 cmd->obj.root.y = y;
 138         } else {
 139                 cmd->obj.root.x = sou->base.gui_x;
 140                 cmd->obj.root.y = sou->base.gui_y;
 141         }
 142
 143         /* Ok to assume that buffer is pinned in vram */
 144         vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
 145         cmd->obj.backingStore.pitch = mode->hdisplay * 4;
 146
 147         vmw_fifo_commit(dev_priv, fifo_size);
 148
 149         sou->defined = true;
 150
 151         return 0;
 152 }
 153
 154 /**
 155  * Send the fifo command to destroy a screen.
 156  */
 157 static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
 158                                 struct vmw_screen_object_unit *sou)
 159 {
 160         size_t fifo_size;
 161         int ret;
 162
 163         struct {
 164                 struct {
 165                         uint32_t cmdType;
 166                 } header;
 167                 SVGAFifoCmdDestroyScreen body;
 168         } *cmd;
 169
 170         /* no need to do anything */
 171         if (unlikely(!sou->defined))
 172                 return 0;
 173
 174         fifo_size = sizeof(*cmd);
 175         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 176         /* the hardware has hung, nothing we can do about it here */
 177         if (unlikely(cmd == NULL)) {
 178                 DRM_ERROR("Fifo reserve failed.\n");
 179                 return -ENOMEM;
 180         }
 181
 182         memset(cmd, 0, fifo_size);
 183         cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
 184         cmd->body.screenId = sou->base.unit;
 185
 186         vmw_fifo_commit(dev_priv, fifo_size);
 187
 188         /* Force sync */
 189         ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
 190         if (unlikely(ret != 0))
 191                 DRM_ERROR("Failed to sync with HW");
 192         else
 193                 sou->defined = false;
 194
 195         return ret;
 196 }
 197
 198 /**
 199  * Free the backing store.
 200  */
 201 static void vmw_sou_backing_free(struct vmw_private *dev_priv,
 202                                  struct vmw_screen_object_unit *sou)
 203 {
 204         struct ttm_buffer_object *bo;
 205
 206         if (unlikely(sou->buffer == NULL))
 207                 return;
 208
 209         bo = &sou->buffer->base;
 210         ttm_bo_unref(&bo);
 211         sou->buffer = NULL;
 212         sou->buffer_size = 0;
 213 }
 214
 215 /**
 216  * Allocate the backing store for the buffer.
 217  */
 218 static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
 219                                  struct vmw_screen_object_unit *sou,
 220                                  unsigned long size)
 221 {
 222         int ret;
 223
 224         if (sou->buffer_size == size)
 225                 return 0;
 226
 227         if (sou->buffer)
 228                 vmw_sou_backing_free(dev_priv, sou);
 229
 230         sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
 231         if (unlikely(sou->buffer == NULL))
 232                 return -ENOMEM;
 233
 234         /* After we have alloced the backing store might not be able to
 235          * resume the overlays, this is preferred to failing to alloc.
 236          */
 237         vmw_overlay_pause_all(dev_priv);
 238         ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
 239                               &vmw_vram_ne_placement,
 240                               false, &vmw_dmabuf_bo_free);
 241         vmw_overlay_resume_all(dev_priv);
 242
 243         if (unlikely(ret != 0))
 244                 sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
 245         else
 246                 sou->buffer_size = size;
 247
 248         return ret;
 249 }
 250
 251 static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
 252 {
 253         struct vmw_private *dev_priv;
 254         struct vmw_screen_object_unit *sou;
 255         struct drm_connector *connector;
 256         struct drm_display_mode *mode;
 257         struct drm_encoder *encoder;
 258         struct vmw_framebuffer *vfb;
 259         struct drm_framebuffer *fb;
 260         struct drm_crtc *crtc;
 261         int ret = 0;
 262
 263         if (!set)
 264                 return -EINVAL;
 265
 266         if (!set->crtc)
 267                 return -EINVAL;
 268
 269         /* get the sou */
 270         crtc = set->crtc;
 271         sou = vmw_crtc_to_sou(crtc);
 272         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 273         dev_priv = vmw_priv(crtc->dev);
 274
 275         if (set->num_connectors > 1) {
 276                 DRM_ERROR("to many connectors\n");
 277                 return -EINVAL;
 278         }
 279
 280         if (set->num_connectors == 1 &&
 281             set->connectors[0] != &sou->base.connector) {
 282                 DRM_ERROR("connector doesn't match %p %p\n",
 283                         set->connectors[0], &sou->base.connector);
 284                 return -EINVAL;
 285         }
 286
 287         /* sou only supports one fb active at the time */
 288         if (sou->base.is_implicit &&
 289             dev_priv->sou_priv->implicit_fb && vfb &&
 290             !(dev_priv->sou_priv->num_implicit == 1 &&
 291               sou->active_implicit) &&
 292             dev_priv->sou_priv->implicit_fb != vfb) {
 293                 DRM_ERROR("Multiple framebuffers not supported\n");
 294                 return -EINVAL;
 295         }
 296
 297         /* since they always map one to one these are safe */
 298         connector = &sou->base.connector;
 299         encoder = &sou->base.encoder;
 300
 301         /* should we turn the crtc off */
 302         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 303                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 304                 /* the hardware has hung don't do anything more */
 305                 if (unlikely(ret != 0))
 306                         return ret;
 307
 308                 connector->encoder = NULL;
 309                 encoder->crtc = NULL;
 310                 crtc->fb = NULL;
 311                 crtc->x = 0;
 312                 crtc->y = 0;
 313
 314                 vmw_sou_del_active(dev_priv, sou);
 315
 316                 vmw_sou_backing_free(dev_priv, sou);
 317
 318                 return 0;
 319         }
 320
 321
 322         /* we now know we want to set a mode */
 323         mode = set->mode;
 324         fb = set->fb;
 325
 326         if (set->x + mode->hdisplay > fb->width ||
 327             set->y + mode->vdisplay > fb->height) {
 328                 DRM_ERROR("set outside of framebuffer\n");
 329                 return -EINVAL;
 330         }
 331
 332         vmw_fb_off(dev_priv);
 333
 334         if (mode->hdisplay != crtc->mode.hdisplay ||
 335             mode->vdisplay != crtc->mode.vdisplay) {
 336                 /* no need to check if depth is different, because backing
 337                  * store depth is forced to 4 by the device.
 338                  */
 339
 340                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 341                 /* the hardware has hung don't do anything more */
 342                 if (unlikely(ret != 0))
 343                         return ret;
 344
 345                 vmw_sou_backing_free(dev_priv, sou);
 346         }
 347
 348         if (!sou->buffer) {
 349                 /* forced to depth 4 by the device */
 350                 size_t size = mode->hdisplay * mode->vdisplay * 4;
 351                 ret = vmw_sou_backing_alloc(dev_priv, sou, size);
 352                 if (unlikely(ret != 0))
 353                         return ret;
 354         }
 355
 356         ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
 357         if (unlikely(ret != 0)) {
 358                 /*
 359                  * We are in a bit of a situation here, the hardware has
 360                  * hung and we may or may not have a buffer hanging of
 361                  * the screen object, best thing to do is not do anything
 362                  * if we where defined, if not just turn the crtc of.
 363                  * Not what userspace wants but it needs to htfu.
 364                  */
 365                 if (sou->defined)
 366                         return ret;
 367
 368                 connector->encoder = NULL;
 369                 encoder->crtc = NULL;
 370                 crtc->fb = NULL;
 371                 crtc->x = 0;
 372                 crtc->y = 0;
 373
 374                 return ret;
 375         }
 376
 377         vmw_sou_add_active(dev_priv, sou, vfb);
 378
 379         connector->encoder = encoder;
 380         encoder->crtc = crtc;
 381         crtc->mode = *mode;
 382         crtc->fb = fb;
 383         crtc->x = set->x;
 384         crtc->y = set->y;
 385
 386         return 0;
 387 }
 388
 389 static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
 390         .save = vmw_du_crtc_save,
 391         .restore = vmw_du_crtc_restore,
 392         .cursor_set = vmw_du_crtc_cursor_set,
 393         .cursor_move = vmw_du_crtc_cursor_move,
 394         .gamma_set = vmw_du_crtc_gamma_set,
 395         .destroy = vmw_sou_crtc_destroy,
 396         .set_config = vmw_sou_crtc_set_config,
 397         .page_flip = vmw_du_page_flip,
 398 };
 399
 400 /*
 401  * Screen Object Display Unit encoder functions
 402  */
 403
 404 static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
 405 {
 406         vmw_sou_destroy(vmw_encoder_to_sou(encoder));
 407 }
 408
 409 static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
 410         .destroy = vmw_sou_encoder_destroy,
 411 };
 412
 413 /*
 414  * Screen Object Display Unit connector functions
 415  */
 416
 417 static void vmw_sou_connector_destroy(struct drm_connector *connector)
 418 {
 419         vmw_sou_destroy(vmw_connector_to_sou(connector));
 420 }
 421
 422 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 423         .dpms = vmw_du_connector_dpms,
 424         .save = vmw_du_connector_save,
 425         .restore = vmw_du_connector_restore,
 426         .detect = vmw_du_connector_detect,
 427         .fill_modes = vmw_du_connector_fill_modes,
 428         .set_property = vmw_du_connector_set_property,
 429         .destroy = vmw_sou_connector_destroy,
 430 };
 431
 432 static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 433 {
 434         struct vmw_screen_object_unit *sou;
 435         struct drm_device *dev = dev_priv->dev;
 436         struct drm_connector *connector;
 437         struct drm_encoder *encoder;
 438         struct drm_crtc *crtc;
 439
 440         sou = kzalloc(sizeof(*sou), GFP_KERNEL);
 441         if (!sou)
 442                 return -ENOMEM;
 443
 444         sou->base.unit = unit;
 445         crtc = &sou->base.crtc;
 446         encoder = &sou->base.encoder;
 447         connector = &sou->base.connector;
 448
 449         sou->active_implicit = false;
 450
 451         sou->base.pref_active = (unit == 0);
 452         sou->base.pref_width = dev_priv->initial_width;
 453         sou->base.pref_height = dev_priv->initial_height;
 454         sou->base.pref_mode = NULL;
 455         sou->base.is_implicit = true;
 456
 457         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 458                            DRM_MODE_CONNECTOR_VIRTUAL);
 459         connector->status = vmw_du_connector_detect(connector, true);
 460
 461         drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
 462                          DRM_MODE_ENCODER_VIRTUAL);
 463         drm_mode_connector_attach_encoder(connector, encoder);
 464         encoder->possible_crtcs = (1 << unit);
 465         encoder->possible_clones = 0;
 466
 467         drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
 468
 469         drm_mode_crtc_set_gamma_size(crtc, 256);
 470
 471         drm_connector_attach_property(connector,
 472                                       dev->mode_config.dirty_info_property,
 473                                       1);
 474
 475         return 0;
 476 }
 477
 478 int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
 479 {
 480         struct drm_device *dev = dev_priv->dev;
 481         int i, ret;
 482
 483         if (dev_priv->sou_priv) {
 484                 DRM_INFO("sou system already on\n");
 485                 return -EINVAL;
 486         }
 487
 488         if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
 489                 DRM_INFO("Not using screen objects,"
 490                          " missing cap SCREEN_OBJECT_2\n");
 491                 return -ENOSYS;
 492         }
 493
 494         ret = -ENOMEM;
 495         dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
 496         if (unlikely(!dev_priv->sou_priv))
 497                 goto err_no_mem;
 498
 499         dev_priv->sou_priv->num_implicit = 0;
 500         dev_priv->sou_priv->implicit_fb = NULL;
 501
 502         ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 503         if (unlikely(ret != 0))
 504                 goto err_free;
 505
 506         ret = drm_mode_create_dirty_info_property(dev);
 507         if (unlikely(ret != 0))
 508                 goto err_vblank_cleanup;
 509
 510         for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 511                 vmw_sou_init(dev_priv, i);
 512
 513         DRM_INFO("Screen objects system initialized\n");
 514
 515         return 0;
 516
 517 err_vblank_cleanup:
 518         drm_vblank_cleanup(dev);
 519 err_free:
 520         kfree(dev_priv->sou_priv);
 521         dev_priv->sou_priv = NULL;
 522 err_no_mem:
 523         return ret;
 524 }
 525
 526 int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
 527 {
 528         struct drm_device *dev = dev_priv->dev;
 529
 530         if (!dev_priv->sou_priv)
 531                 return -ENOSYS;
 532
 533         drm_vblank_cleanup(dev);
 534
 535         kfree(dev_priv->sou_priv);
 536
 537         return 0;
 538 }
 539
 540 /**
 541  * Returns if this unit can be page flipped.
 542  * Must be called with the mode_config mutex held.
 543  */
 544 bool vmw_kms_screen_object_flippable(struct vmw_private *dev_priv,
 545                                      struct drm_crtc *crtc)
 546 {
 547         struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
 548
 549         if (!sou->base.is_implicit)
 550                 return true;
 551
 552         if (dev_priv->sou_priv->num_implicit != 1)
 553                 return false;
 554
 555         return true;
 556 }
 557
 558 /**
 559  * Update the implicit fb to the current fb of this crtc.
 560  * Must be called with the mode_config mutex held.
 561  */
 562 void vmw_kms_screen_object_update_implicit_fb(struct vmw_private *dev_priv,
 563                                               struct drm_crtc *crtc)
 564 {
 565         struct vmw_screen_object_unit *sou = vmw_crtc_to_sou(crtc);
 566
 567         BUG_ON(!sou->base.is_implicit);
 568
 569         dev_priv->sou_priv->implicit_fb =
 570                 vmw_framebuffer_to_vfb(sou->base.crtc.fb);
 571 }