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         struct list_head active;
  40
  41         unsigned num_active;
  42         unsigned last_num_active;
  43
  44         struct vmw_framebuffer *fb;
  45 };
  46
  47 /**
  48  * Display unit using screen objects.
  49  */
  50 struct vmw_screen_object_unit {
  51         struct vmw_display_unit base;
  52
  53         unsigned long buffer_size; /**< Size of allocated buffer */
  54         struct vmw_dma_buffer *buffer; /**< Backing store buffer */
  55
  56         bool defined;
  57
  58         struct list_head active;
  59 };
  60
  61 static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
  62 {
  63         list_del_init(&sou->active);
  64         vmw_display_unit_cleanup(&sou->base);
  65         kfree(sou);
  66 }
  67
  68
  69 /*
  70  * Screen Object Display Unit CRTC functions
  71  */
  72
  73 static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
  74 {
  75         vmw_sou_destroy(vmw_crtc_to_sou(crtc));
  76 }
  77
  78 static int vmw_sou_del_active(struct vmw_private *vmw_priv,
  79                               struct vmw_screen_object_unit *sou)
  80 {
  81         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
  82         if (list_empty(&sou->active))
  83                 return 0;
  84
  85         /* Must init otherwise list_empty(&sou->active) will not work. */
  86         list_del_init(&sou->active);
  87         if (--(ld->num_active) == 0) {
  88                 BUG_ON(!ld->fb);
  89                 if (ld->fb->unpin)
  90                         ld->fb->unpin(ld->fb);
  91                 ld->fb = NULL;
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int vmw_sou_add_active(struct vmw_private *vmw_priv,
  98                               struct vmw_screen_object_unit *sou,
  99                               struct vmw_framebuffer *vfb)
 100 {
 101         struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
 102         struct vmw_screen_object_unit *entry;
 103         struct list_head *at;
 104
 105         BUG_ON(!ld->num_active && ld->fb);
 106         if (vfb != ld->fb) {
 107                 if (ld->fb && ld->fb->unpin)
 108                         ld->fb->unpin(ld->fb);
 109                 if (vfb->pin)
 110                         vfb->pin(vfb);
 111                 ld->fb = vfb;
 112         }
 113
 114         if (!list_empty(&sou->active))
 115                 return 0;
 116
 117         at = &ld->active;
 118         list_for_each_entry(entry, &ld->active, active) {
 119                 if (entry->base.unit > sou->base.unit)
 120                         break;
 121
 122                 at = &entry->active;
 123         }
 124
 125         list_add(&sou->active, at);
 126
 127         ld->num_active++;
 128
 129         return 0;
 130 }
 131
 132 /**
 133  * Send the fifo command to create a screen.
 134  */
 135 static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
 136                                struct vmw_screen_object_unit *sou,
 137                                uint32_t x, uint32_t y,
 138                                struct drm_display_mode *mode)
 139 {
 140         size_t fifo_size;
 141
 142         struct {
 143                 struct {
 144                         uint32_t cmdType;
 145                 } header;
 146                 SVGAScreenObject obj;
 147         } *cmd;
 148
 149         BUG_ON(!sou->buffer);
 150
 151         fifo_size = sizeof(*cmd);
 152         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 153         /* The hardware has hung, nothing we can do about it here. */
 154         if (unlikely(cmd == NULL)) {
 155                 DRM_ERROR("Fifo reserve failed.\n");
 156                 return -ENOMEM;
 157         }
 158
 159         memset(cmd, 0, fifo_size);
 160         cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
 161         cmd->obj.structSize = sizeof(SVGAScreenObject);
 162         cmd->obj.id = sou->base.unit;
 163         cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
 164                 (sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
 165         cmd->obj.size.width = mode->hdisplay;
 166         cmd->obj.size.height = mode->vdisplay;
 167         cmd->obj.root.x = x;
 168         cmd->obj.root.y = y;
 169
 170         /* Ok to assume that buffer is pinned in vram */
 171         vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
 172         cmd->obj.backingStore.pitch = mode->hdisplay * 4;
 173
 174         vmw_fifo_commit(dev_priv, fifo_size);
 175
 176         sou->defined = true;
 177
 178         return 0;
 179 }
 180
 181 /**
 182  * Send the fifo command to destroy a screen.
 183  */
 184 static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
 185                                 struct vmw_screen_object_unit *sou)
 186 {
 187         size_t fifo_size;
 188         int ret;
 189
 190         struct {
 191                 struct {
 192                         uint32_t cmdType;
 193                 } header;
 194                 SVGAFifoCmdDestroyScreen body;
 195         } *cmd;
 196
 197         /* no need to do anything */
 198         if (unlikely(!sou->defined))
 199                 return 0;
 200
 201         fifo_size = sizeof(*cmd);
 202         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 203         /* the hardware has hung, nothing we can do about it here */
 204         if (unlikely(cmd == NULL)) {
 205                 DRM_ERROR("Fifo reserve failed.\n");
 206                 return -ENOMEM;
 207         }
 208
 209         memset(cmd, 0, fifo_size);
 210         cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
 211         cmd->body.screenId = sou->base.unit;
 212
 213         vmw_fifo_commit(dev_priv, fifo_size);
 214
 215         /* Force sync */
 216         ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
 217         if (unlikely(ret != 0))
 218                 DRM_ERROR("Failed to sync with HW");
 219         else
 220                 sou->defined = false;
 221
 222         return ret;
 223 }
 224
 225 /**
 226  * Free the backing store.
 227  */
 228 static void vmw_sou_backing_free(struct vmw_private *dev_priv,
 229                                  struct vmw_screen_object_unit *sou)
 230 {
 231         struct ttm_buffer_object *bo;
 232
 233         if (unlikely(sou->buffer == NULL))
 234                 return;
 235
 236         bo = &sou->buffer->base;
 237         ttm_bo_unref(&bo);
 238         sou->buffer = NULL;
 239         sou->buffer_size = 0;
 240 }
 241
 242 /**
 243  * Allocate the backing store for the buffer.
 244  */
 245 static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
 246                                  struct vmw_screen_object_unit *sou,
 247                                  unsigned long size)
 248 {
 249         int ret;
 250
 251         if (sou->buffer_size == size)
 252                 return 0;
 253
 254         if (sou->buffer)
 255                 vmw_sou_backing_free(dev_priv, sou);
 256
 257         sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
 258         if (unlikely(sou->buffer == NULL))
 259                 return -ENOMEM;
 260
 261         /* After we have alloced the backing store might not be able to
 262          * resume the overlays, this is preferred to failing to alloc.
 263          */
 264         vmw_overlay_pause_all(dev_priv);
 265         ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
 266                               &vmw_vram_ne_placement,
 267                               false, &vmw_dmabuf_bo_free);
 268         vmw_overlay_resume_all(dev_priv);
 269
 270         if (unlikely(ret != 0))
 271                 sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
 272         else
 273                 sou->buffer_size = size;
 274
 275         return ret;
 276 }
 277
 278 static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
 279 {
 280         struct vmw_private *dev_priv;
 281         struct vmw_screen_object_unit *sou;
 282         struct drm_connector *connector;
 283         struct drm_display_mode *mode;
 284         struct drm_encoder *encoder;
 285         struct vmw_framebuffer *vfb;
 286         struct drm_framebuffer *fb;
 287         struct drm_crtc *crtc;
 288         int ret = 0;
 289
 290         if (!set)
 291                 return -EINVAL;
 292
 293         if (!set->crtc)
 294                 return -EINVAL;
 295
 296         /* get the sou */
 297         crtc = set->crtc;
 298         sou = vmw_crtc_to_sou(crtc);
 299         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 300         dev_priv = vmw_priv(crtc->dev);
 301
 302         if (set->num_connectors > 1) {
 303                 DRM_ERROR("to many connectors\n");
 304                 return -EINVAL;
 305         }
 306
 307         if (set->num_connectors == 1 &&
 308             set->connectors[0] != &sou->base.connector) {
 309                 DRM_ERROR("connector doesn't match %p %p\n",
 310                         set->connectors[0], &sou->base.connector);
 311                 return -EINVAL;
 312         }
 313
 314         /* sou only supports one fb active at the time */
 315         if (dev_priv->sou_priv->fb && vfb &&
 316             !(dev_priv->sou_priv->num_active == 1 &&
 317               !list_empty(&sou->active)) &&
 318             dev_priv->sou_priv->fb != vfb) {
 319                 DRM_ERROR("Multiple framebuffers not supported\n");
 320                 return -EINVAL;
 321         }
 322
 323         /* since they always map one to one these are safe */
 324         connector = &sou->base.connector;
 325         encoder = &sou->base.encoder;
 326
 327         /* should we turn the crtc off */
 328         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 329                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 330                 /* the hardware has hung don't do anything more */
 331                 if (unlikely(ret != 0))
 332                         return ret;
 333
 334                 connector->encoder = NULL;
 335                 encoder->crtc = NULL;
 336                 crtc->fb = NULL;
 337                 crtc->x = 0;
 338                 crtc->y = 0;
 339
 340                 vmw_sou_del_active(dev_priv, sou);
 341
 342                 vmw_sou_backing_free(dev_priv, sou);
 343
 344                 return 0;
 345         }
 346
 347
 348         /* we now know we want to set a mode */
 349         mode = set->mode;
 350         fb = set->fb;
 351
 352         if (set->x + mode->hdisplay > fb->width ||
 353             set->y + mode->vdisplay > fb->height) {
 354                 DRM_ERROR("set outside of framebuffer\n");
 355                 return -EINVAL;
 356         }
 357
 358         vmw_fb_off(dev_priv);
 359
 360         if (mode->hdisplay != crtc->mode.hdisplay ||
 361             mode->vdisplay != crtc->mode.vdisplay) {
 362                 /* no need to check if depth is different, because backing
 363                  * store depth is forced to 4 by the device.
 364                  */
 365
 366                 ret = vmw_sou_fifo_destroy(dev_priv, sou);
 367                 /* the hardware has hung don't do anything more */
 368                 if (unlikely(ret != 0))
 369                         return ret;
 370
 371                 vmw_sou_backing_free(dev_priv, sou);
 372         }
 373
 374         if (!sou->buffer) {
 375                 /* forced to depth 4 by the device */
 376                 size_t size = mode->hdisplay * mode->vdisplay * 4;
 377                 ret = vmw_sou_backing_alloc(dev_priv, sou, size);
 378                 if (unlikely(ret != 0))
 379                         return ret;
 380         }
 381
 382         ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
 383         if (unlikely(ret != 0)) {
 384                 /*
 385                  * We are in a bit of a situation here, the hardware has
 386                  * hung and we may or may not have a buffer hanging of
 387                  * the screen object, best thing to do is not do anything
 388                  * if we where defined, if not just turn the crtc of.
 389                  * Not what userspace wants but it needs to htfu.
 390                  */
 391                 if (sou->defined)
 392                         return ret;
 393
 394                 connector->encoder = NULL;
 395                 encoder->crtc = NULL;
 396                 crtc->fb = NULL;
 397                 crtc->x = 0;
 398                 crtc->y = 0;
 399
 400                 return ret;
 401         }
 402
 403         vmw_sou_add_active(dev_priv, sou, vfb);
 404
 405         connector->encoder = encoder;
 406         encoder->crtc = crtc;
 407         crtc->mode = *mode;
 408         crtc->fb = fb;
 409         crtc->x = set->x;
 410         crtc->y = set->y;
 411
 412         return 0;
 413 }
 414
 415 static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
 416         .save = vmw_du_crtc_save,
 417         .restore = vmw_du_crtc_restore,
 418         .cursor_set = vmw_du_crtc_cursor_set,
 419         .cursor_move = vmw_du_crtc_cursor_move,
 420         .gamma_set = vmw_du_crtc_gamma_set,
 421         .destroy = vmw_sou_crtc_destroy,
 422         .set_config = vmw_sou_crtc_set_config,
 423 };
 424
 425 /*
 426  * Screen Object Display Unit encoder functions
 427  */
 428
 429 static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
 430 {
 431         vmw_sou_destroy(vmw_encoder_to_sou(encoder));
 432 }
 433
 434 static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
 435         .destroy = vmw_sou_encoder_destroy,
 436 };
 437
 438 /*
 439  * Screen Object Display Unit connector functions
 440  */
 441
 442 static void vmw_sou_connector_destroy(struct drm_connector *connector)
 443 {
 444         vmw_sou_destroy(vmw_connector_to_sou(connector));
 445 }
 446
 447 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 448         .dpms = vmw_du_connector_dpms,
 449         .save = vmw_du_connector_save,
 450         .restore = vmw_du_connector_restore,
 451         .detect = vmw_du_connector_detect,
 452         .fill_modes = vmw_du_connector_fill_modes,
 453         .set_property = vmw_du_connector_set_property,
 454         .destroy = vmw_sou_connector_destroy,
 455 };
 456
 457 static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 458 {
 459         struct vmw_screen_object_unit *sou;
 460         struct drm_device *dev = dev_priv->dev;
 461         struct drm_connector *connector;
 462         struct drm_encoder *encoder;
 463         struct drm_crtc *crtc;
 464
 465         sou = kzalloc(sizeof(*sou), GFP_KERNEL);
 466         if (!sou)
 467                 return -ENOMEM;
 468
 469         sou->base.unit = unit;
 470         crtc = &sou->base.crtc;
 471         encoder = &sou->base.encoder;
 472         connector = &sou->base.connector;
 473
 474         INIT_LIST_HEAD(&sou->active);
 475
 476         sou->base.pref_active = (unit == 0);
 477         sou->base.pref_width = 800;
 478         sou->base.pref_height = 600;
 479         sou->base.pref_mode = NULL;
 480
 481         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 482                            DRM_MODE_CONNECTOR_LVDS);
 483         connector->status = vmw_du_connector_detect(connector, true);
 484
 485         drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
 486                          DRM_MODE_ENCODER_LVDS);
 487         drm_mode_connector_attach_encoder(connector, encoder);
 488         encoder->possible_crtcs = (1 << unit);
 489         encoder->possible_clones = 0;
 490
 491         drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
 492
 493         drm_mode_crtc_set_gamma_size(crtc, 256);
 494
 495         drm_connector_attach_property(connector,
 496                                       dev->mode_config.dirty_info_property,
 497                                       1);
 498
 499         return 0;
 500 }
 501
 502 int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
 503 {
 504         struct drm_device *dev = dev_priv->dev;
 505         int i, ret;
 506
 507         if (dev_priv->sou_priv) {
 508                 DRM_INFO("sou system already on\n");
 509                 return -EINVAL;
 510         }
 511
 512         if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
 513                 DRM_INFO("Not using screen objects,"
 514                          " missing cap SCREEN_OBJECT_2\n");
 515                 return -ENOSYS;
 516         }
 517
 518         ret = -ENOMEM;
 519         dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
 520         if (unlikely(!dev_priv->sou_priv))
 521                 goto err_no_mem;
 522
 523         INIT_LIST_HEAD(&dev_priv->sou_priv->active);
 524         dev_priv->sou_priv->num_active = 0;
 525         dev_priv->sou_priv->last_num_active = 0;
 526         dev_priv->sou_priv->fb = NULL;
 527
 528         ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 529         if (unlikely(ret != 0))
 530                 goto err_free;
 531
 532         ret = drm_mode_create_dirty_info_property(dev);
 533         if (unlikely(ret != 0))
 534                 goto err_vblank_cleanup;
 535
 536         for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 537                 vmw_sou_init(dev_priv, i);
 538
 539         DRM_INFO("Screen objects system initialized\n");
 540
 541         return 0;
 542
 543 err_vblank_cleanup:
 544         drm_vblank_cleanup(dev);
 545 err_free:
 546         kfree(dev_priv->sou_priv);
 547         dev_priv->sou_priv = NULL;
 548 err_no_mem:
 549         return ret;
 550 }
 551
 552 int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
 553 {
 554         struct drm_device *dev = dev_priv->dev;
 555
 556         if (!dev_priv->sou_priv)
 557                 return -ENOSYS;
 558
 559         drm_vblank_cleanup(dev);
 560
 561         if (!list_empty(&dev_priv->sou_priv->active))
 562                 DRM_ERROR("Still have active outputs when unloading driver");
 563
 564         kfree(dev_priv->sou_priv);
 565
 566         return 0;
 567 }