drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2007 David Airlie
   4  * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include <linux/pci.h>
  30
  31 #include <drm/drm_fourcc.h>
  32 #include <drm/ttm/ttm_placement.h>
  33
  34 #include "vmwgfx_drv.h"
  35 #include "vmwgfx_kms.h"
  36
  37 #define VMW_DIRTY_DELAY (HZ / 30)
  38
  39 struct vmw_fb_par {
  40         struct vmw_private *vmw_priv;
  41
  42         void *vmalloc;
  43
  44         struct mutex bo_mutex;
  45         struct vmw_buffer_object *vmw_bo;
  46         unsigned bo_size;
  47         struct drm_framebuffer *set_fb;
  48         struct drm_display_mode *set_mode;
  49         u32 fb_x;
  50         u32 fb_y;
  51         bool bo_iowrite;
  52
  53         u32 pseudo_palette[17];
  54
  55         unsigned max_width;
  56         unsigned max_height;
  57
  58         struct {
  59                 spinlock_t lock;
  60                 bool active;
  61                 unsigned x1;
  62                 unsigned y1;
  63                 unsigned x2;
  64                 unsigned y2;
  65         } dirty;
  66
  67         struct drm_crtc *crtc;
  68         struct drm_connector *con;
  69         struct delayed_work local_work;
  70 };
  71
  72 static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
  73                             unsigned blue, unsigned transp,
  74                             struct fb_info *info)
  75 {
  76         struct vmw_fb_par *par = info->par;
  77         u32 *pal = par->pseudo_palette;
  78
  79         if (regno > 15) {
  80                 DRM_ERROR("Bad regno %u.\n", regno);
  81                 return 1;
  82         }
  83
  84         switch (par->set_fb->format->depth) {
  85         case 24:
  86         case 32:
  87                 pal[regno] = ((red & 0xff00) << 8) |
  88                               (green & 0xff00) |
  89                              ((blue  & 0xff00) >> 8);
  90                 break;
  91         default:
  92                 DRM_ERROR("Bad depth %u, bpp %u.\n",
  93                           par->set_fb->format->depth,
  94                           par->set_fb->format->cpp[0] * 8);
  95                 return 1;
  96         }
  97
  98         return 0;
  99 }
 100
 101 static int vmw_fb_check_var(struct fb_var_screeninfo *var,
 102                             struct fb_info *info)
 103 {
 104         int depth = var->bits_per_pixel;
 105         struct vmw_fb_par *par = info->par;
 106         struct vmw_private *vmw_priv = par->vmw_priv;
 107
 108         switch (var->bits_per_pixel) {
 109         case 32:
 110                 depth = (var->transp.length > 0) ? 32 : 24;
 111                 break;
 112         default:
 113                 DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
 114                 return -EINVAL;
 115         }
 116
 117         switch (depth) {
 118         case 24:
 119                 var->red.offset = 16;
 120                 var->green.offset = 8;
 121                 var->blue.offset = 0;
 122                 var->red.length = 8;
 123                 var->green.length = 8;
 124                 var->blue.length = 8;
 125                 var->transp.length = 0;
 126                 var->transp.offset = 0;
 127                 break;
 128         case 32:
 129                 var->red.offset = 16;
 130                 var->green.offset = 8;
 131                 var->blue.offset = 0;
 132                 var->red.length = 8;
 133                 var->green.length = 8;
 134                 var->blue.length = 8;
 135                 var->transp.length = 8;
 136                 var->transp.offset = 24;
 137                 break;
 138         default:
 139                 DRM_ERROR("Bad depth %u.\n", depth);
 140                 return -EINVAL;
 141         }
 142
 143         if ((var->xoffset + var->xres) > par->max_width ||
 144             (var->yoffset + var->yres) > par->max_height) {
 145                 DRM_ERROR("Requested geom can not fit in framebuffer\n");
 146                 return -EINVAL;
 147         }
 148
 149         if (!vmw_kms_validate_mode_vram(vmw_priv,
 150                                         var->xres * var->bits_per_pixel/8,
 151                                         var->yoffset + var->yres)) {
 152                 DRM_ERROR("Requested geom can not fit in framebuffer\n");
 153                 return -EINVAL;
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int vmw_fb_blank(int blank, struct fb_info *info)
 160 {
 161         return 0;
 162 }
 163
 164 /**
 165  * vmw_fb_dirty_flush - flush dirty regions to the kms framebuffer
 166  *
 167  * @work: The struct work_struct associated with this task.
 168  *
 169  * This function flushes the dirty regions of the vmalloc framebuffer to the
 170  * kms framebuffer, and if the kms framebuffer is visible, also updated the
 171  * corresponding displays. Note that this function runs even if the kms
 172  * framebuffer is not bound to a crtc and thus not visible, but it's turned
 173  * off during hibernation using the par->dirty.active bool.
 174  */
 175 static void vmw_fb_dirty_flush(struct work_struct *work)
 176 {
 177         struct vmw_fb_par *par = container_of(work, struct vmw_fb_par,
 178                                               local_work.work);
 179         struct vmw_private *vmw_priv = par->vmw_priv;
 180         struct fb_info *info = vmw_priv->fb_info;
 181         unsigned long irq_flags;
 182         s32 dst_x1, dst_x2, dst_y1, dst_y2, w = 0, h = 0;
 183         u32 cpp, max_x, max_y;
 184         struct drm_clip_rect clip;
 185         struct drm_framebuffer *cur_fb;
 186         u8 *src_ptr, *dst_ptr;
 187         struct vmw_buffer_object *vbo = par->vmw_bo;
 188         void *virtual;
 189
 190         if (!READ_ONCE(par->dirty.active))
 191                 return;
 192
 193         mutex_lock(&par->bo_mutex);
 194         cur_fb = par->set_fb;
 195         if (!cur_fb)
 196                 goto out_unlock;
 197
 198         (void) ttm_read_lock(&vmw_priv->reservation_sem, false);
 199         (void) ttm_bo_reserve(&vbo->base, false, false, NULL);
 200         virtual = vmw_bo_map_and_cache(vbo);
 201         if (!virtual)
 202                 goto out_unreserve;
 203
 204         spin_lock_irqsave(&par->dirty.lock, irq_flags);
 205         if (!par->dirty.active) {
 206                 spin_unlock_irqrestore(&par->dirty.lock, irq_flags);
 207                 goto out_unreserve;
 208         }
 209
 210         /*
 211          * Handle panning when copying from vmalloc to framebuffer.
 212          * Clip dirty area to framebuffer.
 213          */
 214         cpp = cur_fb->format->cpp[0];
 215         max_x = par->fb_x + cur_fb->width;
 216         max_y = par->fb_y + cur_fb->height;
 217
 218         dst_x1 = par->dirty.x1 - par->fb_x;
 219         dst_y1 = par->dirty.y1 - par->fb_y;
 220         dst_x1 = max_t(s32, dst_x1, 0);
 221         dst_y1 = max_t(s32, dst_y1, 0);
 222
 223         dst_x2 = par->dirty.x2 - par->fb_x;
 224         dst_y2 = par->dirty.y2 - par->fb_y;
 225         dst_x2 = min_t(s32, dst_x2, max_x);
 226         dst_y2 = min_t(s32, dst_y2, max_y);
 227         w = dst_x2 - dst_x1;
 228         h = dst_y2 - dst_y1;
 229         w = max_t(s32, 0, w);
 230         h = max_t(s32, 0, h);
 231
 232         par->dirty.x1 = par->dirty.x2 = 0;
 233         par->dirty.y1 = par->dirty.y2 = 0;
 234         spin_unlock_irqrestore(&par->dirty.lock, irq_flags);
 235
 236         if (w && h) {
 237                 dst_ptr = (u8 *)virtual  +
 238                         (dst_y1 * par->set_fb->pitches[0] + dst_x1 * cpp);
 239                 src_ptr = (u8 *)par->vmalloc +
 240                         ((dst_y1 + par->fb_y) * info->fix.line_length +
 241                          (dst_x1 + par->fb_x) * cpp);
 242
 243                 while (h-- > 0) {
 244                         memcpy(dst_ptr, src_ptr, w*cpp);
 245                         dst_ptr += par->set_fb->pitches[0];
 246                         src_ptr += info->fix.line_length;
 247                 }
 248
 249                 clip.x1 = dst_x1;
 250                 clip.x2 = dst_x2;
 251                 clip.y1 = dst_y1;
 252                 clip.y2 = dst_y2;
 253         }
 254
 255 out_unreserve:
 256         ttm_bo_unreserve(&vbo->base);
 257         ttm_read_unlock(&vmw_priv->reservation_sem);
 258         if (w && h) {
 259                 WARN_ON_ONCE(par->set_fb->funcs->dirty(cur_fb, NULL, 0, 0,
 260                                                        &clip, 1));
 261                 vmw_fifo_flush(vmw_priv, false);
 262         }
 263 out_unlock:
 264         mutex_unlock(&par->bo_mutex);
 265 }
 266
 267 static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
 268                               unsigned x1, unsigned y1,
 269                               unsigned width, unsigned height)
 270 {
 271         unsigned long flags;
 272         unsigned x2 = x1 + width;
 273         unsigned y2 = y1 + height;
 274
 275         spin_lock_irqsave(&par->dirty.lock, flags);
 276         if (par->dirty.x1 == par->dirty.x2) {
 277                 par->dirty.x1 = x1;
 278                 par->dirty.y1 = y1;
 279                 par->dirty.x2 = x2;
 280                 par->dirty.y2 = y2;
 281                 /* if we are active start the dirty work
 282                  * we share the work with the defio system */
 283                 if (par->dirty.active)
 284                         schedule_delayed_work(&par->local_work,
 285                                               VMW_DIRTY_DELAY);
 286         } else {
 287                 if (x1 < par->dirty.x1)
 288                         par->dirty.x1 = x1;
 289                 if (y1 < par->dirty.y1)
 290                         par->dirty.y1 = y1;
 291                 if (x2 > par->dirty.x2)
 292                         par->dirty.x2 = x2;
 293                 if (y2 > par->dirty.y2)
 294                         par->dirty.y2 = y2;
 295         }
 296         spin_unlock_irqrestore(&par->dirty.lock, flags);
 297 }
 298
 299 static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
 300                               struct fb_info *info)
 301 {
 302         struct vmw_fb_par *par = info->par;
 303
 304         if ((var->xoffset + var->xres) > var->xres_virtual ||
 305             (var->yoffset + var->yres) > var->yres_virtual) {
 306                 DRM_ERROR("Requested panning can not fit in framebuffer\n");
 307                 return -EINVAL;
 308         }
 309
 310         mutex_lock(&par->bo_mutex);
 311         par->fb_x = var->xoffset;
 312         par->fb_y = var->yoffset;
 313         if (par->set_fb)
 314                 vmw_fb_dirty_mark(par, par->fb_x, par->fb_y, par->set_fb->width,
 315                                   par->set_fb->height);
 316         mutex_unlock(&par->bo_mutex);
 317
 318         return 0;
 319 }
 320
 321 static void vmw_deferred_io(struct fb_info *info,
 322                             struct list_head *pagelist)
 323 {
 324         struct vmw_fb_par *par = info->par;
 325         unsigned long start, end, min, max;
 326         unsigned long flags;
 327         struct page *page;
 328         int y1, y2;
 329
 330         min = ULONG_MAX;
 331         max = 0;
 332         list_for_each_entry(page, pagelist, lru) {
 333                 start = page->index << PAGE_SHIFT;
 334                 end = start + PAGE_SIZE - 1;
 335                 min = min(min, start);
 336                 max = max(max, end);
 337         }
 338
 339         if (min < max) {
 340                 y1 = min / info->fix.line_length;
 341                 y2 = (max / info->fix.line_length) + 1;
 342
 343                 spin_lock_irqsave(&par->dirty.lock, flags);
 344                 par->dirty.x1 = 0;
 345                 par->dirty.y1 = y1;
 346                 par->dirty.x2 = info->var.xres;
 347                 par->dirty.y2 = y2;
 348                 spin_unlock_irqrestore(&par->dirty.lock, flags);
 349
 350                 /*
 351                  * Since we've already waited on this work once, try to
 352                  * execute asap.
 353                  */
 354                 cancel_delayed_work(&par->local_work);
 355                 schedule_delayed_work(&par->local_work, 0);
 356         }
 357 };
 358
 359 static struct fb_deferred_io vmw_defio = {
 360         .delay          = VMW_DIRTY_DELAY,
 361         .deferred_io    = vmw_deferred_io,
 362 };
 363
 364 /*
 365  * Draw code
 366  */
 367
 368 static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 369 {
 370         cfb_fillrect(info, rect);
 371         vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
 372                           rect->width, rect->height);
 373 }
 374
 375 static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
 376 {
 377         cfb_copyarea(info, region);
 378         vmw_fb_dirty_mark(info->par, region->dx, region->dy,
 379                           region->width, region->height);
 380 }
 381
 382 static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
 383 {
 384         cfb_imageblit(info, image);
 385         vmw_fb_dirty_mark(info->par, image->dx, image->dy,
 386                           image->width, image->height);
 387 }
 388
 389 /*
 390  * Bring up code
 391  */
 392
 393 static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
 394                             size_t size, struct vmw_buffer_object **out)
 395 {
 396         struct vmw_buffer_object *vmw_bo;
 397         int ret;
 398
 399         (void) ttm_write_lock(&vmw_priv->reservation_sem, false);
 400
 401         vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
 402         if (!vmw_bo) {
 403                 ret = -ENOMEM;
 404                 goto err_unlock;
 405         }
 406
 407         ret = vmw_bo_init(vmw_priv, vmw_bo, size,
 408                               &vmw_sys_placement,
 409                               false, false,
 410                               &vmw_bo_bo_free);
 411         if (unlikely(ret != 0))
 412                 goto err_unlock; /* init frees the buffer on failure */
 413
 414         *out = vmw_bo;
 415         ttm_write_unlock(&vmw_priv->reservation_sem);
 416
 417         return 0;
 418
 419 err_unlock:
 420         ttm_write_unlock(&vmw_priv->reservation_sem);
 421         return ret;
 422 }
 423
 424 static int vmw_fb_compute_depth(struct fb_var_screeninfo *var,
 425                                 int *depth)
 426 {
 427         switch (var->bits_per_pixel) {
 428         case 32:
 429                 *depth = (var->transp.length > 0) ? 32 : 24;
 430                 break;
 431         default:
 432                 DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
 433                 return -EINVAL;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int vmwgfx_set_config_internal(struct drm_mode_set *set)
 440 {
 441         struct drm_crtc *crtc = set->crtc;
 442         struct drm_modeset_acquire_ctx ctx;
 443         int ret;
 444
 445         drm_modeset_acquire_init(&ctx, 0);
 446
 447 restart:
 448         ret = crtc->funcs->set_config(set, &ctx);
 449
 450         if (ret == -EDEADLK) {
 451                 drm_modeset_backoff(&ctx);
 452                 goto restart;
 453         }
 454
 455         drm_modeset_drop_locks(&ctx);
 456         drm_modeset_acquire_fini(&ctx);
 457
 458         return ret;
 459 }
 460
 461 static int vmw_fb_kms_detach(struct vmw_fb_par *par,
 462                              bool detach_bo,
 463                              bool unref_bo)
 464 {
 465         struct drm_framebuffer *cur_fb = par->set_fb;
 466         int ret;
 467
 468         /* Detach the KMS framebuffer from crtcs */
 469         if (par->set_mode) {
 470                 struct drm_mode_set set;
 471
 472                 set.crtc = par->crtc;
 473                 set.x = 0;
 474                 set.y = 0;
 475                 set.mode = NULL;
 476                 set.fb = NULL;
 477                 set.num_connectors = 0;
 478                 set.connectors = &par->con;
 479                 ret = vmwgfx_set_config_internal(&set);
 480                 if (ret) {
 481                         DRM_ERROR("Could not unset a mode.\n");
 482                         return ret;
 483                 }
 484                 drm_mode_destroy(par->vmw_priv->dev, par->set_mode);
 485                 par->set_mode = NULL;
 486         }
 487
 488         if (cur_fb) {
 489                 drm_framebuffer_put(cur_fb);
 490                 par->set_fb = NULL;
 491         }
 492
 493         if (par->vmw_bo && detach_bo && unref_bo)
 494                 vmw_bo_unreference(&par->vmw_bo);
 495
 496         return 0;
 497 }
 498
 499 static int vmw_fb_kms_framebuffer(struct fb_info *info)
 500 {
 501         struct drm_mode_fb_cmd2 mode_cmd;
 502         struct vmw_fb_par *par = info->par;
 503         struct fb_var_screeninfo *var = &info->var;
 504         struct drm_framebuffer *cur_fb;
 505         struct vmw_framebuffer *vfb;
 506         int ret = 0, depth;
 507         size_t new_bo_size;
 508
 509         ret = vmw_fb_compute_depth(var, &depth);
 510         if (ret)
 511                 return ret;
 512
 513         mode_cmd.width = var->xres;
 514         mode_cmd.height = var->yres;
 515         mode_cmd.pitches[0] = ((var->bits_per_pixel + 7) / 8) * mode_cmd.width;
 516         mode_cmd.pixel_format =
 517                 drm_mode_legacy_fb_format(var->bits_per_pixel, depth);
 518
 519         cur_fb = par->set_fb;
 520         if (cur_fb && cur_fb->width == mode_cmd.width &&
 521             cur_fb->height == mode_cmd.height &&
 522             cur_fb->format->format == mode_cmd.pixel_format &&
 523             cur_fb->pitches[0] == mode_cmd.pitches[0])
 524                 return 0;
 525
 526         /* Need new buffer object ? */
 527         new_bo_size = (size_t) mode_cmd.pitches[0] * (size_t) mode_cmd.height;
 528         ret = vmw_fb_kms_detach(par,
 529                                 par->bo_size < new_bo_size ||
 530                                 par->bo_size > 2*new_bo_size,
 531                                 true);
 532         if (ret)
 533                 return ret;
 534
 535         if (!par->vmw_bo) {
 536                 ret = vmw_fb_create_bo(par->vmw_priv, new_bo_size,
 537                                        &par->vmw_bo);
 538                 if (ret) {
 539                         DRM_ERROR("Failed creating a buffer object for "
 540                                   "fbdev.\n");
 541                         return ret;
 542                 }
 543                 par->bo_size = new_bo_size;
 544         }
 545
 546         vfb = vmw_kms_new_framebuffer(par->vmw_priv, par->vmw_bo, NULL,
 547                                       true, &mode_cmd);
 548         if (IS_ERR(vfb))
 549                 return PTR_ERR(vfb);
 550
 551         par->set_fb = &vfb->base;
 552
 553         return 0;
 554 }
 555
 556 static int vmw_fb_set_par(struct fb_info *info)
 557 {
 558         struct vmw_fb_par *par = info->par;
 559         struct vmw_private *vmw_priv = par->vmw_priv;
 560         struct drm_mode_set set;
 561         struct fb_var_screeninfo *var = &info->var;
 562         struct drm_display_mode new_mode = { DRM_MODE("fb_mode",
 563                 DRM_MODE_TYPE_DRIVER,
 564                 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 565                 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC)
 566         };
 567         struct drm_display_mode *mode;
 568         int ret;
 569
 570         mode = drm_mode_duplicate(vmw_priv->dev, &new_mode);
 571         if (!mode) {
 572                 DRM_ERROR("Could not create new fb mode.\n");
 573                 return -ENOMEM;
 574         }
 575
 576         mode->hdisplay = var->xres;
 577         mode->vdisplay = var->yres;
 578         vmw_guess_mode_timing(mode);
 579
 580         if (!vmw_kms_validate_mode_vram(vmw_priv,
 581                                         mode->hdisplay *
 582                                         DIV_ROUND_UP(var->bits_per_pixel, 8),
 583                                         mode->vdisplay)) {
 584                 drm_mode_destroy(vmw_priv->dev, mode);
 585                 return -EINVAL;
 586         }
 587
 588         mutex_lock(&par->bo_mutex);
 589         ret = vmw_fb_kms_framebuffer(info);
 590         if (ret)
 591                 goto out_unlock;
 592
 593         par->fb_x = var->xoffset;
 594         par->fb_y = var->yoffset;
 595
 596         set.crtc = par->crtc;
 597         set.x = 0;
 598         set.y = 0;
 599         set.mode = mode;
 600         set.fb = par->set_fb;
 601         set.num_connectors = 1;
 602         set.connectors = &par->con;
 603
 604         ret = vmwgfx_set_config_internal(&set);
 605         if (ret)
 606                 goto out_unlock;
 607
 608         vmw_fb_dirty_mark(par, par->fb_x, par->fb_y,
 609                           par->set_fb->width, par->set_fb->height);
 610
 611         /* If there already was stuff dirty we wont
 612          * schedule a new work, so lets do it now */
 613
 614         schedule_delayed_work(&par->local_work, 0);
 615
 616 out_unlock:
 617         if (par->set_mode)
 618                 drm_mode_destroy(vmw_priv->dev, par->set_mode);
 619         par->set_mode = mode;
 620
 621         mutex_unlock(&par->bo_mutex);
 622
 623         return ret;
 624 }
 625
 626
 627 static const struct fb_ops vmw_fb_ops = {
 628         .owner = THIS_MODULE,
 629         .fb_check_var = vmw_fb_check_var,
 630         .fb_set_par = vmw_fb_set_par,
 631         .fb_setcolreg = vmw_fb_setcolreg,
 632         .fb_fillrect = vmw_fb_fillrect,
 633         .fb_copyarea = vmw_fb_copyarea,
 634         .fb_imageblit = vmw_fb_imageblit,
 635         .fb_pan_display = vmw_fb_pan_display,
 636         .fb_blank = vmw_fb_blank,
 637 };
 638
 639 int vmw_fb_init(struct vmw_private *vmw_priv)
 640 {
 641         struct device *device = &vmw_priv->dev->pdev->dev;
 642         struct vmw_fb_par *par;
 643         struct fb_info *info;
 644         unsigned fb_width, fb_height;
 645         unsigned int fb_bpp, fb_pitch, fb_size;
 646         struct drm_display_mode *init_mode;
 647         int ret;
 648
 649         fb_bpp = 32;
 650
 651         /* XXX As shouldn't these be as well. */
 652         fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
 653         fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
 654
 655         fb_pitch = fb_width * fb_bpp / 8;
 656         fb_size = fb_pitch * fb_height;
 657
 658         info = framebuffer_alloc(sizeof(*par), device);
 659         if (!info)
 660                 return -ENOMEM;
 661
 662         /*
 663          * Par
 664          */
 665         vmw_priv->fb_info = info;
 666         par = info->par;
 667         memset(par, 0, sizeof(*par));
 668         INIT_DELAYED_WORK(&par->local_work, &vmw_fb_dirty_flush);
 669         par->vmw_priv = vmw_priv;
 670         par->vmalloc = NULL;
 671         par->max_width = fb_width;
 672         par->max_height = fb_height;
 673
 674         ret = vmw_kms_fbdev_init_data(vmw_priv, 0, par->max_width,
 675                                       par->max_height, &par->con,
 676                                       &par->crtc, &init_mode);
 677         if (ret)
 678                 goto err_kms;
 679
 680         info->var.xres = init_mode->hdisplay;
 681         info->var.yres = init_mode->vdisplay;
 682
 683         /*
 684          * Create buffers and alloc memory
 685          */
 686         par->vmalloc = vzalloc(fb_size);
 687         if (unlikely(par->vmalloc == NULL)) {
 688                 ret = -ENOMEM;
 689                 goto err_free;
 690         }
 691
 692         /*
 693          * Fixed and var
 694          */
 695         strcpy(info->fix.id, "svgadrmfb");
 696         info->fix.type = FB_TYPE_PACKED_PIXELS;
 697         info->fix.visual = FB_VISUAL_TRUECOLOR;
 698         info->fix.type_aux = 0;
 699         info->fix.xpanstep = 1; /* doing it in hw */
 700         info->fix.ypanstep = 1; /* doing it in hw */
 701         info->fix.ywrapstep = 0;
 702         info->fix.accel = FB_ACCEL_NONE;
 703         info->fix.line_length = fb_pitch;
 704
 705         info->fix.smem_start = 0;
 706         info->fix.smem_len = fb_size;
 707
 708         info->pseudo_palette = par->pseudo_palette;
 709         info->screen_base = (char __iomem *)par->vmalloc;
 710         info->screen_size = fb_size;
 711
 712         info->fbops = &vmw_fb_ops;
 713
 714         /* 24 depth per default */
 715         info->var.red.offset = 16;
 716         info->var.green.offset = 8;
 717         info->var.blue.offset = 0;
 718         info->var.red.length = 8;
 719         info->var.green.length = 8;
 720         info->var.blue.length = 8;
 721         info->var.transp.offset = 0;
 722         info->var.transp.length = 0;
 723
 724         info->var.xres_virtual = fb_width;
 725         info->var.yres_virtual = fb_height;
 726         info->var.bits_per_pixel = fb_bpp;
 727         info->var.xoffset = 0;
 728         info->var.yoffset = 0;
 729         info->var.activate = FB_ACTIVATE_NOW;
 730         info->var.height = -1;
 731         info->var.width = -1;
 732
 733         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 734         info->apertures = alloc_apertures(1);
 735         if (!info->apertures) {
 736                 ret = -ENOMEM;
 737                 goto err_aper;
 738         }
 739         info->apertures->ranges[0].base = vmw_priv->vram_start;
 740         info->apertures->ranges[0].size = vmw_priv->vram_size;
 741
 742         /*
 743          * Dirty & Deferred IO
 744          */
 745         par->dirty.x1 = par->dirty.x2 = 0;
 746         par->dirty.y1 = par->dirty.y2 = 0;
 747         par->dirty.active = true;
 748         spin_lock_init(&par->dirty.lock);
 749         mutex_init(&par->bo_mutex);
 750         info->fbdefio = &vmw_defio;
 751         fb_deferred_io_init(info);
 752
 753         ret = register_framebuffer(info);
 754         if (unlikely(ret != 0))
 755                 goto err_defio;
 756
 757         vmw_fb_set_par(info);
 758
 759         return 0;
 760
 761 err_defio:
 762         fb_deferred_io_cleanup(info);
 763 err_aper:
 764 err_free:
 765         vfree(par->vmalloc);
 766 err_kms:
 767         framebuffer_release(info);
 768         vmw_priv->fb_info = NULL;
 769
 770         return ret;
 771 }
 772
 773 int vmw_fb_close(struct vmw_private *vmw_priv)
 774 {
 775         struct fb_info *info;
 776         struct vmw_fb_par *par;
 777
 778         if (!vmw_priv->fb_info)
 779                 return 0;
 780
 781         info = vmw_priv->fb_info;
 782         par = info->par;
 783
 784         /* ??? order */
 785         fb_deferred_io_cleanup(info);
 786         cancel_delayed_work_sync(&par->local_work);
 787         unregister_framebuffer(info);
 788
 789         mutex_lock(&par->bo_mutex);
 790         (void) vmw_fb_kms_detach(par, true, true);
 791         mutex_unlock(&par->bo_mutex);
 792
 793         vfree(par->vmalloc);
 794         framebuffer_release(info);
 795
 796         return 0;
 797 }
 798
 799 int vmw_fb_off(struct vmw_private *vmw_priv)
 800 {
 801         struct fb_info *info;
 802         struct vmw_fb_par *par;
 803         unsigned long flags;
 804
 805         if (!vmw_priv->fb_info)
 806                 return -EINVAL;
 807
 808         info = vmw_priv->fb_info;
 809         par = info->par;
 810
 811         spin_lock_irqsave(&par->dirty.lock, flags);
 812         par->dirty.active = false;
 813         spin_unlock_irqrestore(&par->dirty.lock, flags);
 814
 815         flush_delayed_work(&info->deferred_work);
 816         flush_delayed_work(&par->local_work);
 817
 818         return 0;
 819 }
 820
 821 int vmw_fb_on(struct vmw_private *vmw_priv)
 822 {
 823         struct fb_info *info;
 824         struct vmw_fb_par *par;
 825         unsigned long flags;
 826
 827         if (!vmw_priv->fb_info)
 828                 return -EINVAL;
 829
 830         info = vmw_priv->fb_info;
 831         par = info->par;
 832
 833         spin_lock_irqsave(&par->dirty.lock, flags);
 834         par->dirty.active = true;
 835         spin_unlock_irqrestore(&par->dirty.lock, flags);
 836
 837         /*
 838          * Need to reschedule a dirty update, because otherwise that's
 839          * only done in dirty_mark() if the previous coalesced
 840          * dirty region was empty.
 841          */
 842         schedule_delayed_work(&par->local_work, 0);
 843
 844         return 0;
 845 }