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