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_active;
  40
  41         struct vmw_framebuffer *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;
  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) {
  79                 if (--(ld->num_active) == 0)
  80                         ld->fb = NULL;
  81                 sou->active = 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_active && ld->fb);
  92
  93         if (!sou->active) {
  94                 ld->fb = vfb;
  95                 sou->active = true;
  96                 ld->num_active++;
  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         cmd->obj.root.x = x;
 136         cmd->obj.root.y = y;
 137
 138         /* Ok to assume that buffer is pinned in vram */
 139         vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
 140         cmd->obj.backingStore.pitch = mode->hdisplay * 4;
 141
 142         vmw_fifo_commit(dev_priv, fifo_size);
 143
 144         sou->defined = true;
 145
 146         return 0;
 147 }
 148
 149 /**
 150  * Send the fifo command to destroy a screen.
 151  */
 152 static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
 153                                 struct vmw_screen_object_unit *sou)
 154 {
 155         size_t fifo_size;
 156         int ret;
 157
 158         struct {
 159                 struct {
 160                         uint32_t cmdType;
 161                 } header;
 162                 SVGAFifoCmdDestroyScreen body;
 163         } *cmd;
 164
 165         /* no need to do anything */
 166         if (unlikely(!sou->defined))
 167                 return 0;
 168
 169         fifo_size = sizeof(*cmd);
 170         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 171         /* the hardware has hung, nothing we can do about it here */
 172         if (unlikely(cmd == NULL)) {
 173                 DRM_ERROR("Fifo reserve failed.\n");
 174                 return -ENOMEM;
 175         }
 176
 177         memset(cmd, 0, fifo_size);
 178         cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
 179         cmd->body.screenId = sou->base.unit;
 180
 181         vmw_fifo_commit(dev_priv, fifo_size);
 182
 183         /* Force sync */
 184         ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
 185         if (unlikely(ret != 0))
 186                 DRM_ERROR("Failed to sync with HW");
 187         else
 188                 sou->defined = false;
 189
 190         return ret;
 191 }
 192
 193 /**
 194  * Free the backing store.
 195  */
 196 static void vmw_sou_backing_free(struct vmw_private *dev_priv,
 197                                  struct vmw_screen_object_unit *sou)
 198 {
 199         struct ttm_buffer_object *bo;
 200
 201         if (unlikely(sou->buffer == NULL))
 202                 return;
 203
 204         bo = &sou->buffer->base;
 205         ttm_bo_unref(&bo);
 206         sou->buffer = NULL;
 207         sou->buffer_size = 0;
 208 }
 209
 210 /**
 211  * Allocate the backing store for the buffer.
 212  */
 213 static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
 214                                  struct vmw_screen_object_unit *sou,
 215                                  unsigned long size)
 216 {
 217         int ret;
 218
 219         if (sou->buffer_size == size)
 220                 return 0;
 221
 222         if (sou->buffer)
 223                 vmw_sou_backing_free(dev_priv, sou);
 224
 225         sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
 226         if (unlikely(sou->buffer == NULL))
 227                 return -ENOMEM;
 228
 229         /* After we have alloced the backing store might not be able to
 230          * resume the overlays, this is preferred to failing to alloc.
 231          */
 232         vmw_overlay_pause_all(dev_priv);
 233         ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
 234                               &vmw_vram_ne_placement,
 235                               false, &vmw_dmabuf_bo_free);
 236         vmw_overlay_resume_all(dev_priv);
 237
 238         if (unlikely(ret != 0))
 239                 sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
 240         else
 241                 sou->buffer_size = size;
 242
 243         return ret;
 244 }
 245
 246 static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
 247 {
 248         struct vmw_private *dev_priv;
 249         struct vmw_screen_object_unit *sou;
 250         struct drm_connector *connector;
 251         struct drm_display_mode *mode;
 252         struct drm_encoder *encoder;
 253         struct vmw_framebuffer *vfb;
 254         struct drm_framebuffer *fb;
 255         struct drm_crtc *crtc;
 256         int ret = 0;
 257
 258         if (!set)
 259                 return -EINVAL;
 260
 261         if (!set->crtc)
 262                 return -EINVAL;
 263
 264         /* get the sou */
 265         crtc = set->crtc;
 266         sou = vmw_crtc_to_sou(crtc);
 267         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 268         dev_priv = vmw_priv(crtc->dev);
 269
 270         if (set->num_connectors > 1) {
 271                 DRM_ERROR("to many connectors\n");
 272                 return -EINVAL;
 273         }
 274
 275         if (set->num_connectors == 1 &&
 276             set->connectors[0] != &sou->base.connector) {
 277                 DRM_ERROR("connector doesn't match %p %p\n",
 278                         set->connectors[0], &sou->base.connector);
 279                 return -EINVAL;
 280         }
 281
 282         /* sou only supports one fb active at the time */
 283         if (dev_priv->sou_priv->fb && vfb &&
 284             !(dev_priv->sou_priv->num_active == 1 &&
 285               sou->active) &&
 286             dev_priv->sou_priv->fb != vfb) {
 287                 DRM_ERROR("Multiple framebuffers not supported\n");
 288                 return -EINVAL;
 289         }
 290
 291         /* since they always map one to one these are safe */
 292         connector = &sou->base.connector;
 293         encoder = &sou->base.encoder;
 294
 295         /* should we turn the crtc off */
 296         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 297                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 298                 /* the hardware has hung don't do anything more */
 299                 if (unlikely(ret != 0))
 300                         return ret;
 301
 302                 connector->encoder = NULL;
 303                 encoder->crtc = NULL;
 304                 crtc->fb = NULL;
 305                 crtc->x = 0;
 306                 crtc->y = 0;
 307
 308                 vmw_sou_del_active(dev_priv, sou);
 309
 310                 vmw_sou_backing_free(dev_priv, sou);
 311
 312                 return 0;
 313         }
 314
 315
 316         /* we now know we want to set a mode */
 317         mode = set->mode;
 318         fb = set->fb;
 319
 320         if (set->x + mode->hdisplay > fb->width ||
 321             set->y + mode->vdisplay > fb->height) {
 322                 DRM_ERROR("set outside of framebuffer\n");
 323                 return -EINVAL;
 324         }
 325
 326         vmw_fb_off(dev_priv);
 327
 328         if (mode->hdisplay != crtc->mode.hdisplay ||
 329             mode->vdisplay != crtc->mode.vdisplay) {
 330                 /* no need to check if depth is different, because backing
 331                  * store depth is forced to 4 by the device.
 332                  */
 333
 334                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 335                 /* the hardware has hung don't do anything more */
 336                 if (unlikely(ret != 0))
 337                         return ret;
 338
 339                 vmw_sou_backing_free(dev_priv, sou);
 340         }
 341
 342         if (!sou->buffer) {
 343                 /* forced to depth 4 by the device */
 344                 size_t size = mode->hdisplay * mode->vdisplay * 4;
 345                 ret = vmw_sou_backing_alloc(dev_priv, sou, size);
 346                 if (unlikely(ret != 0))
 347                         return ret;
 348         }
 349
 350         ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
 351         if (unlikely(ret != 0)) {
 352                 /*
 353                  * We are in a bit of a situation here, the hardware has
 354                  * hung and we may or may not have a buffer hanging of
 355                  * the screen object, best thing to do is not do anything
 356                  * if we where defined, if not just turn the crtc of.
 357                  * Not what userspace wants but it needs to htfu.
 358                  */
 359                 if (sou->defined)
 360                         return ret;
 361
 362                 connector->encoder = NULL;
 363                 encoder->crtc = NULL;
 364                 crtc->fb = NULL;
 365                 crtc->x = 0;
 366                 crtc->y = 0;
 367
 368                 return ret;
 369         }
 370
 371         vmw_sou_add_active(dev_priv, sou, vfb);
 372
 373         connector->encoder = encoder;
 374         encoder->crtc = crtc;
 375         crtc->mode = *mode;
 376         crtc->fb = fb;
 377         crtc->x = set->x;
 378         crtc->y = set->y;
 379
 380         return 0;
 381 }
 382
 383 static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
 384         .save = vmw_du_crtc_save,
 385         .restore = vmw_du_crtc_restore,
 386         .cursor_set = vmw_du_crtc_cursor_set,
 387         .cursor_move = vmw_du_crtc_cursor_move,
 388         .gamma_set = vmw_du_crtc_gamma_set,
 389         .destroy = vmw_sou_crtc_destroy,
 390         .set_config = vmw_sou_crtc_set_config,
 391 };
 392
 393 /*
 394  * Screen Object Display Unit encoder functions
 395  */
 396
 397 static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
 398 {
 399         vmw_sou_destroy(vmw_encoder_to_sou(encoder));
 400 }
 401
 402 static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
 403         .destroy = vmw_sou_encoder_destroy,
 404 };
 405
 406 /*
 407  * Screen Object Display Unit connector functions
 408  */
 409
 410 static void vmw_sou_connector_destroy(struct drm_connector *connector)
 411 {
 412         vmw_sou_destroy(vmw_connector_to_sou(connector));
 413 }
 414
 415 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 416         .dpms = vmw_du_connector_dpms,
 417         .save = vmw_du_connector_save,
 418         .restore = vmw_du_connector_restore,
 419         .detect = vmw_du_connector_detect,
 420         .fill_modes = vmw_du_connector_fill_modes,
 421         .set_property = vmw_du_connector_set_property,
 422         .destroy = vmw_sou_connector_destroy,
 423 };
 424
 425 static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 426 {
 427         struct vmw_screen_object_unit *sou;
 428         struct drm_device *dev = dev_priv->dev;
 429         struct drm_connector *connector;
 430         struct drm_encoder *encoder;
 431         struct drm_crtc *crtc;
 432
 433         sou = kzalloc(sizeof(*sou), GFP_KERNEL);
 434         if (!sou)
 435                 return -ENOMEM;
 436
 437         sou->base.unit = unit;
 438         crtc = &sou->base.crtc;
 439         encoder = &sou->base.encoder;
 440         connector = &sou->base.connector;
 441
 442         sou->active = false;
 443
 444         sou->base.pref_active = (unit == 0);
 445         sou->base.pref_width = 800;
 446         sou->base.pref_height = 600;
 447         sou->base.pref_mode = NULL;
 448
 449         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 450                            DRM_MODE_CONNECTOR_VIRTUAL);
 451         connector->status = vmw_du_connector_detect(connector, true);
 452
 453         drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
 454                          DRM_MODE_ENCODER_VIRTUAL);
 455         drm_mode_connector_attach_encoder(connector, encoder);
 456         encoder->possible_crtcs = (1 << unit);
 457         encoder->possible_clones = 0;
 458
 459         drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
 460
 461         drm_mode_crtc_set_gamma_size(crtc, 256);
 462
 463         drm_connector_attach_property(connector,
 464                                       dev->mode_config.dirty_info_property,
 465                                       1);
 466
 467         return 0;
 468 }
 469
 470 int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
 471 {
 472         struct drm_device *dev = dev_priv->dev;
 473         int i, ret;
 474
 475         if (dev_priv->sou_priv) {
 476                 DRM_INFO("sou system already on\n");
 477                 return -EINVAL;
 478         }
 479
 480         if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
 481                 DRM_INFO("Not using screen objects,"
 482                          " missing cap SCREEN_OBJECT_2\n");
 483                 return -ENOSYS;
 484         }
 485
 486         ret = -ENOMEM;
 487         dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
 488         if (unlikely(!dev_priv->sou_priv))
 489                 goto err_no_mem;
 490
 491         dev_priv->sou_priv->num_active = 0;
 492         dev_priv->sou_priv->fb = NULL;
 493
 494         ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 495         if (unlikely(ret != 0))
 496                 goto err_free;
 497
 498         ret = drm_mode_create_dirty_info_property(dev);
 499         if (unlikely(ret != 0))
 500                 goto err_vblank_cleanup;
 501
 502         for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 503                 vmw_sou_init(dev_priv, i);
 504
 505         DRM_INFO("Screen objects system initialized\n");
 506
 507         return 0;
 508
 509 err_vblank_cleanup:
 510         drm_vblank_cleanup(dev);
 511 err_free:
 512         kfree(dev_priv->sou_priv);
 513         dev_priv->sou_priv = NULL;
 514 err_no_mem:
 515         return ret;
 516 }
 517
 518 int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
 519 {
 520         struct drm_device *dev = dev_priv->dev;
 521
 522         if (!dev_priv->sou_priv)
 523                 return -ENOSYS;
 524
 525         drm_vblank_cleanup(dev);
 526
 527         if (dev_priv->sou_priv->num_active > 0)
 528                 DRM_ERROR("Still have active outputs when unloading driver");
 529
 530         kfree(dev_priv->sou_priv);
 531
 532         return 0;
 533 }