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_bo_reserve(&vbo->base, false, false, NULL);
 199         virtual = vmw_bo_map_and_cache(vbo);
 200         if (!virtual)
 201                 goto out_unreserve;
 202
 203         spin_lock_irqsave(&par->dirty.lock, irq_flags);
 204         if (!par->dirty.active) {
 205                 spin_unlock_irqrestore(&par->dirty.lock, irq_flags);
 206                 goto out_unreserve;
 207         }
 208
 209         /*
 210          * Handle panning when copying from vmalloc to framebuffer.
 211          * Clip dirty area to framebuffer.
 212          */
 213         cpp = cur_fb->format->cpp[0];
 214         max_x = par->fb_x + cur_fb->width;
 215         max_y = par->fb_y + cur_fb->height;
 216
 217         dst_x1 = par->dirty.x1 - par->fb_x;
 218         dst_y1 = par->dirty.y1 - par->fb_y;
 219         dst_x1 = max_t(s32, dst_x1, 0);
 220         dst_y1 = max_t(s32, dst_y1, 0);
 221
 222         dst_x2 = par->dirty.x2 - par->fb_x;
 223         dst_y2 = par->dirty.y2 - par->fb_y;
 224         dst_x2 = min_t(s32, dst_x2, max_x);
 225         dst_y2 = min_t(s32, dst_y2, max_y);
 226         w = dst_x2 - dst_x1;
 227         h = dst_y2 - dst_y1;
 228         w = max_t(s32, 0, w);
 229         h = max_t(s32, 0, h);
 230
 231         par->dirty.x1 = par->dirty.x2 = 0;
 232         par->dirty.y1 = par->dirty.y2 = 0;
 233         spin_unlock_irqrestore(&par->dirty.lock, irq_flags);
 234
 235         if (w && h) {
 236                 dst_ptr = (u8 *)virtual  +
 237                         (dst_y1 * par->set_fb->pitches[0] + dst_x1 * cpp);
 238                 src_ptr = (u8 *)par->vmalloc +
 239                         ((dst_y1 + par->fb_y) * info->fix.line_length +
 240                          (dst_x1 + par->fb_x) * cpp);
 241
 242                 while (h-- > 0) {
 243                         memcpy(dst_ptr, src_ptr, w*cpp);
 244                         dst_ptr += par->set_fb->pitches[0];
 245                         src_ptr += info->fix.line_length;
 246                 }
 247
 248                 clip.x1 = dst_x1;
 249                 clip.x2 = dst_x2;
 250                 clip.y1 = dst_y1;
 251                 clip.y2 = dst_y2;
 252         }
 253
 254 out_unreserve:
 255         ttm_bo_unreserve(&vbo->base);
 256         if (w && h) {
 257                 WARN_ON_ONCE(par->set_fb->funcs->dirty(cur_fb, NULL, 0, 0,
 258                                                        &clip, 1));
 259                 vmw_cmd_flush(vmw_priv, false);
 260         }
 261 out_unlock:
 262         mutex_unlock(&par->bo_mutex);
 263 }
 264
 265 static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
 266                               unsigned x1, unsigned y1,
 267                               unsigned width, unsigned height)
 268 {
 269         unsigned long flags;
 270         unsigned x2 = x1 + width;
 271         unsigned y2 = y1 + height;
 272
 273         spin_lock_irqsave(&par->dirty.lock, flags);
 274         if (par->dirty.x1 == par->dirty.x2) {
 275                 par->dirty.x1 = x1;
 276                 par->dirty.y1 = y1;
 277                 par->dirty.x2 = x2;
 278                 par->dirty.y2 = y2;
 279                 /* if we are active start the dirty work
 280                  * we share the work with the defio system */
 281                 if (par->dirty.active)
 282                         schedule_delayed_work(&par->local_work,
 283                                               VMW_DIRTY_DELAY);
 284         } else {
 285                 if (x1 < par->dirty.x1)
 286                         par->dirty.x1 = x1;
 287                 if (y1 < par->dirty.y1)
 288                         par->dirty.y1 = y1;
 289                 if (x2 > par->dirty.x2)
 290                         par->dirty.x2 = x2;
 291                 if (y2 > par->dirty.y2)
 292                         par->dirty.y2 = y2;
 293         }
 294         spin_unlock_irqrestore(&par->dirty.lock, flags);
 295 }
 296
 297 static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
 298                               struct fb_info *info)
 299 {
 300         struct vmw_fb_par *par = info->par;
 301
 302         if ((var->xoffset + var->xres) > var->xres_virtual ||
 303             (var->yoffset + var->yres) > var->yres_virtual) {
 304                 DRM_ERROR("Requested panning can not fit in framebuffer\n");
 305                 return -EINVAL;
 306         }
 307
 308         mutex_lock(&par->bo_mutex);
 309         par->fb_x = var->xoffset;
 310         par->fb_y = var->yoffset;
 311         if (par->set_fb)
 312                 vmw_fb_dirty_mark(par, par->fb_x, par->fb_y, par->set_fb->width,
 313                                   par->set_fb->height);
 314         mutex_unlock(&par->bo_mutex);
 315
 316         return 0;
 317 }
 318
 319 static void vmw_deferred_io(struct fb_info *info,
 320                             struct list_head *pagelist)
 321 {
 322         struct vmw_fb_par *par = info->par;
 323         unsigned long start, end, min, max;
 324         unsigned long flags;
 325         struct page *page;
 326         int y1, y2;
 327
 328         min = ULONG_MAX;
 329         max = 0;
 330         list_for_each_entry(page, pagelist, lru) {
 331                 start = page->index << PAGE_SHIFT;
 332                 end = start + PAGE_SIZE - 1;
 333                 min = min(min, start);
 334                 max = max(max, end);
 335         }
 336
 337         if (min < max) {
 338                 y1 = min / info->fix.line_length;
 339                 y2 = (max / info->fix.line_length) + 1;
 340
 341                 spin_lock_irqsave(&par->dirty.lock, flags);
 342                 par->dirty.x1 = 0;
 343                 par->dirty.y1 = y1;
 344                 par->dirty.x2 = info->var.xres;
 345                 par->dirty.y2 = y2;
 346                 spin_unlock_irqrestore(&par->dirty.lock, flags);
 347
 348                 /*
 349                  * Since we've already waited on this work once, try to
 350                  * execute asap.
 351                  */
 352                 cancel_delayed_work(&par->local_work);
 353                 schedule_delayed_work(&par->local_work, 0);
 354         }
 355 };
 356
 357 static struct fb_deferred_io vmw_defio = {
 358         .delay          = VMW_DIRTY_DELAY,
 359         .deferred_io    = vmw_deferred_io,
 360 };
 361
 362 /*
 363  * Draw code
 364  */
 365
 366 static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 367 {
 368         cfb_fillrect(info, rect);
 369         vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
 370                           rect->width, rect->height);
 371 }
 372
 373 static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
 374 {
 375         cfb_copyarea(info, region);
 376         vmw_fb_dirty_mark(info->par, region->dx, region->dy,
 377                           region->width, region->height);
 378 }
 379
 380 static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
 381 {
 382         cfb_imageblit(info, image);
 383         vmw_fb_dirty_mark(info->par, image->dx, image->dy,
 384                           image->width, image->height);
 385 }
 386
 387 /*
 388  * Bring up code
 389  */
 390
 391 static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
 392                             size_t size, struct vmw_buffer_object **out)
 393 {
 394         struct vmw_buffer_object *vmw_bo;
 395         int ret;
 396
 397         vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
 398         if (!vmw_bo) {
 399                 ret = -ENOMEM;
 400                 goto err_unlock;
 401         }
 402
 403         ret = vmw_bo_init(vmw_priv, vmw_bo, size,
 404                               &vmw_sys_placement,
 405                               false, false,
 406                               &vmw_bo_bo_free);
 407         if (unlikely(ret != 0))
 408                 goto err_unlock; /* init frees the buffer on failure */
 409
 410         *out = vmw_bo;
 411
 412 err_unlock:
 413         return ret;
 414 }
 415
 416 static int vmw_fb_compute_depth(struct fb_var_screeninfo *var,
 417                                 int *depth)
 418 {
 419         switch (var->bits_per_pixel) {
 420         case 32:
 421                 *depth = (var->transp.length > 0) ? 32 : 24;
 422                 break;
 423         default:
 424                 DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
 425                 return -EINVAL;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int vmwgfx_set_config_internal(struct drm_mode_set *set)
 432 {
 433         struct drm_crtc *crtc = set->crtc;
 434         struct drm_modeset_acquire_ctx ctx;
 435         int ret;
 436
 437         drm_modeset_acquire_init(&ctx, 0);
 438
 439 restart:
 440         ret = crtc->funcs->set_config(set, &ctx);
 441
 442         if (ret == -EDEADLK) {
 443                 drm_modeset_backoff(&ctx);
 444                 goto restart;
 445         }
 446
 447         drm_modeset_drop_locks(&ctx);
 448         drm_modeset_acquire_fini(&ctx);
 449
 450         return ret;
 451 }
 452
 453 static int vmw_fb_kms_detach(struct vmw_fb_par *par,
 454                              bool detach_bo,
 455                              bool unref_bo)
 456 {
 457         struct drm_framebuffer *cur_fb = par->set_fb;
 458         int ret;
 459
 460         /* Detach the KMS framebuffer from crtcs */
 461         if (par->set_mode) {
 462                 struct drm_mode_set set;
 463
 464                 set.crtc = par->crtc;
 465                 set.x = 0;
 466                 set.y = 0;
 467                 set.mode = NULL;
 468                 set.fb = NULL;
 469                 set.num_connectors = 0;
 470                 set.connectors = &par->con;
 471                 ret = vmwgfx_set_config_internal(&set);
 472                 if (ret) {
 473                         DRM_ERROR("Could not unset a mode.\n");
 474                         return ret;
 475                 }
 476                 drm_mode_destroy(&par->vmw_priv->drm, par->set_mode);
 477                 par->set_mode = NULL;
 478         }
 479
 480         if (cur_fb) {
 481                 drm_framebuffer_put(cur_fb);
 482                 par->set_fb = NULL;
 483         }
 484
 485         if (par->vmw_bo && detach_bo && unref_bo)
 486                 vmw_bo_unreference(&par->vmw_bo);
 487
 488         return 0;
 489 }
 490
 491 static int vmw_fb_kms_framebuffer(struct fb_info *info)
 492 {
 493         struct drm_mode_fb_cmd2 mode_cmd;
 494         struct vmw_fb_par *par = info->par;
 495         struct fb_var_screeninfo *var = &info->var;
 496         struct drm_framebuffer *cur_fb;
 497         struct vmw_framebuffer *vfb;
 498         int ret = 0, depth;
 499         size_t new_bo_size;
 500
 501         ret = vmw_fb_compute_depth(var, &depth);
 502         if (ret)
 503                 return ret;
 504
 505         mode_cmd.width = var->xres;
 506         mode_cmd.height = var->yres;
 507         mode_cmd.pitches[0] = ((var->bits_per_pixel + 7) / 8) * mode_cmd.width;
 508         mode_cmd.pixel_format =
 509                 drm_mode_legacy_fb_format(var->bits_per_pixel, depth);
 510
 511         cur_fb = par->set_fb;
 512         if (cur_fb && cur_fb->width == mode_cmd.width &&
 513             cur_fb->height == mode_cmd.height &&
 514             cur_fb->format->format == mode_cmd.pixel_format &&
 515             cur_fb->pitches[0] == mode_cmd.pitches[0])
 516                 return 0;
 517
 518         /* Need new buffer object ? */
 519         new_bo_size = (size_t) mode_cmd.pitches[0] * (size_t) mode_cmd.height;
 520         ret = vmw_fb_kms_detach(par,
 521                                 par->bo_size < new_bo_size ||
 522                                 par->bo_size > 2*new_bo_size,
 523                                 true);
 524         if (ret)
 525                 return ret;
 526
 527         if (!par->vmw_bo) {
 528                 ret = vmw_fb_create_bo(par->vmw_priv, new_bo_size,
 529                                        &par->vmw_bo);
 530                 if (ret) {
 531                         DRM_ERROR("Failed creating a buffer object for "
 532                                   "fbdev.\n");
 533                         return ret;
 534                 }
 535                 par->bo_size = new_bo_size;
 536         }
 537
 538         vfb = vmw_kms_new_framebuffer(par->vmw_priv, par->vmw_bo, NULL,
 539                                       true, &mode_cmd);
 540         if (IS_ERR(vfb))
 541                 return PTR_ERR(vfb);
 542
 543         par->set_fb = &vfb->base;
 544
 545         return 0;
 546 }
 547
 548 static int vmw_fb_set_par(struct fb_info *info)
 549 {
 550         struct vmw_fb_par *par = info->par;
 551         struct vmw_private *vmw_priv = par->vmw_priv;
 552         struct drm_mode_set set;
 553         struct fb_var_screeninfo *var = &info->var;
 554         struct drm_display_mode new_mode = { DRM_MODE("fb_mode",
 555                 DRM_MODE_TYPE_DRIVER,
 556                 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 557                 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC)
 558         };
 559         struct drm_display_mode *mode;
 560         int ret;
 561
 562         mode = drm_mode_duplicate(&vmw_priv->drm, &new_mode);
 563         if (!mode) {
 564                 DRM_ERROR("Could not create new fb mode.\n");
 565                 return -ENOMEM;
 566         }
 567
 568         mode->hdisplay = var->xres;
 569         mode->vdisplay = var->yres;
 570         vmw_guess_mode_timing(mode);
 571
 572         if (!vmw_kms_validate_mode_vram(vmw_priv,
 573                                         mode->hdisplay *
 574                                         DIV_ROUND_UP(var->bits_per_pixel, 8),
 575                                         mode->vdisplay)) {
 576                 drm_mode_destroy(&vmw_priv->drm, mode);
 577                 return -EINVAL;
 578         }
 579
 580         mutex_lock(&par->bo_mutex);
 581         ret = vmw_fb_kms_framebuffer(info);
 582         if (ret)
 583                 goto out_unlock;
 584
 585         par->fb_x = var->xoffset;
 586         par->fb_y = var->yoffset;
 587
 588         set.crtc = par->crtc;
 589         set.x = 0;
 590         set.y = 0;
 591         set.mode = mode;
 592         set.fb = par->set_fb;
 593         set.num_connectors = 1;
 594         set.connectors = &par->con;
 595
 596         ret = vmwgfx_set_config_internal(&set);
 597         if (ret)
 598                 goto out_unlock;
 599
 600         vmw_fb_dirty_mark(par, par->fb_x, par->fb_y,
 601                           par->set_fb->width, par->set_fb->height);
 602
 603         /* If there already was stuff dirty we wont
 604          * schedule a new work, so lets do it now */
 605
 606         schedule_delayed_work(&par->local_work, 0);
 607
 608 out_unlock:
 609         if (par->set_mode)
 610                 drm_mode_destroy(&vmw_priv->drm, par->set_mode);
 611         par->set_mode = mode;
 612
 613         mutex_unlock(&par->bo_mutex);
 614
 615         return ret;
 616 }
 617
 618
 619 static const struct fb_ops vmw_fb_ops = {
 620         .owner = THIS_MODULE,
 621         .fb_check_var = vmw_fb_check_var,
 622         .fb_set_par = vmw_fb_set_par,
 623         .fb_setcolreg = vmw_fb_setcolreg,
 624         .fb_fillrect = vmw_fb_fillrect,
 625         .fb_copyarea = vmw_fb_copyarea,
 626         .fb_imageblit = vmw_fb_imageblit,
 627         .fb_pan_display = vmw_fb_pan_display,
 628         .fb_blank = vmw_fb_blank,
 629 };
 630
 631 int vmw_fb_init(struct vmw_private *vmw_priv)
 632 {
 633         struct device *device = vmw_priv->drm.dev;
 634         struct vmw_fb_par *par;
 635         struct fb_info *info;
 636         unsigned fb_width, fb_height;
 637         unsigned int fb_bpp, fb_pitch, fb_size;
 638         struct drm_display_mode *init_mode;
 639         int ret;
 640
 641         fb_bpp = 32;
 642
 643         /* XXX As shouldn't these be as well. */
 644         fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
 645         fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
 646
 647         fb_pitch = fb_width * fb_bpp / 8;
 648         fb_size = fb_pitch * fb_height;
 649
 650         info = framebuffer_alloc(sizeof(*par), device);
 651         if (!info)
 652                 return -ENOMEM;
 653
 654         /*
 655          * Par
 656          */
 657         vmw_priv->fb_info = info;
 658         par = info->par;
 659         memset(par, 0, sizeof(*par));
 660         INIT_DELAYED_WORK(&par->local_work, &vmw_fb_dirty_flush);
 661         par->vmw_priv = vmw_priv;
 662         par->vmalloc = NULL;
 663         par->max_width = fb_width;
 664         par->max_height = fb_height;
 665
 666         ret = vmw_kms_fbdev_init_data(vmw_priv, 0, par->max_width,
 667                                       par->max_height, &par->con,
 668                                       &par->crtc, &init_mode);
 669         if (ret)
 670                 goto err_kms;
 671
 672         info->var.xres = init_mode->hdisplay;
 673         info->var.yres = init_mode->vdisplay;
 674
 675         /*
 676          * Create buffers and alloc memory
 677          */
 678         par->vmalloc = vzalloc(fb_size);
 679         if (unlikely(par->vmalloc == NULL)) {
 680                 ret = -ENOMEM;
 681                 goto err_free;
 682         }
 683
 684         /*
 685          * Fixed and var
 686          */
 687         strcpy(info->fix.id, "svgadrmfb");
 688         info->fix.type = FB_TYPE_PACKED_PIXELS;
 689         info->fix.visual = FB_VISUAL_TRUECOLOR;
 690         info->fix.type_aux = 0;
 691         info->fix.xpanstep = 1; /* doing it in hw */
 692         info->fix.ypanstep = 1; /* doing it in hw */
 693         info->fix.ywrapstep = 0;
 694         info->fix.accel = FB_ACCEL_NONE;
 695         info->fix.line_length = fb_pitch;
 696
 697         info->fix.smem_start = 0;
 698         info->fix.smem_len = fb_size;
 699
 700         info->pseudo_palette = par->pseudo_palette;
 701         info->screen_base = (char __iomem *)par->vmalloc;
 702         info->screen_size = fb_size;
 703
 704         info->fbops = &vmw_fb_ops;
 705
 706         /* 24 depth per default */
 707         info->var.red.offset = 16;
 708         info->var.green.offset = 8;
 709         info->var.blue.offset = 0;
 710         info->var.red.length = 8;
 711         info->var.green.length = 8;
 712         info->var.blue.length = 8;
 713         info->var.transp.offset = 0;
 714         info->var.transp.length = 0;
 715
 716         info->var.xres_virtual = fb_width;
 717         info->var.yres_virtual = fb_height;
 718         info->var.bits_per_pixel = fb_bpp;
 719         info->var.xoffset = 0;
 720         info->var.yoffset = 0;
 721         info->var.activate = FB_ACTIVATE_NOW;
 722         info->var.height = -1;
 723         info->var.width = -1;
 724
 725         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 726         info->apertures = alloc_apertures(1);
 727         if (!info->apertures) {
 728                 ret = -ENOMEM;
 729                 goto err_aper;
 730         }
 731         info->apertures->ranges[0].base = vmw_priv->vram_start;
 732         info->apertures->ranges[0].size = vmw_priv->vram_size;
 733
 734         /*
 735          * Dirty & Deferred IO
 736          */
 737         par->dirty.x1 = par->dirty.x2 = 0;
 738         par->dirty.y1 = par->dirty.y2 = 0;
 739         par->dirty.active = true;
 740         spin_lock_init(&par->dirty.lock);
 741         mutex_init(&par->bo_mutex);
 742         info->fbdefio = &vmw_defio;
 743         fb_deferred_io_init(info);
 744
 745         ret = register_framebuffer(info);
 746         if (unlikely(ret != 0))
 747                 goto err_defio;
 748
 749         vmw_fb_set_par(info);
 750
 751         return 0;
 752
 753 err_defio:
 754         fb_deferred_io_cleanup(info);
 755 err_aper:
 756 err_free:
 757         vfree(par->vmalloc);
 758 err_kms:
 759         framebuffer_release(info);
 760         vmw_priv->fb_info = NULL;
 761
 762         return ret;
 763 }
 764
 765 int vmw_fb_close(struct vmw_private *vmw_priv)
 766 {
 767         struct fb_info *info;
 768         struct vmw_fb_par *par;
 769
 770         if (!vmw_priv->fb_info)
 771                 return 0;
 772
 773         info = vmw_priv->fb_info;
 774         par = info->par;
 775
 776         /* ??? order */
 777         fb_deferred_io_cleanup(info);
 778         cancel_delayed_work_sync(&par->local_work);
 779         unregister_framebuffer(info);
 780
 781         mutex_lock(&par->bo_mutex);
 782         (void) vmw_fb_kms_detach(par, true, true);
 783         mutex_unlock(&par->bo_mutex);
 784
 785         vfree(par->vmalloc);
 786         framebuffer_release(info);
 787
 788         return 0;
 789 }
 790
 791 int vmw_fb_off(struct vmw_private *vmw_priv)
 792 {
 793         struct fb_info *info;
 794         struct vmw_fb_par *par;
 795         unsigned long flags;
 796
 797         if (!vmw_priv->fb_info)
 798                 return -EINVAL;
 799
 800         info = vmw_priv->fb_info;
 801         par = info->par;
 802
 803         spin_lock_irqsave(&par->dirty.lock, flags);
 804         par->dirty.active = false;
 805         spin_unlock_irqrestore(&par->dirty.lock, flags);
 806
 807         flush_delayed_work(&info->deferred_work);
 808         flush_delayed_work(&par->local_work);
 809
 810         return 0;
 811 }
 812
 813 int vmw_fb_on(struct vmw_private *vmw_priv)
 814 {
 815         struct fb_info *info;
 816         struct vmw_fb_par *par;
 817         unsigned long flags;
 818
 819         if (!vmw_priv->fb_info)
 820                 return -EINVAL;
 821
 822         info = vmw_priv->fb_info;
 823         par = info->par;
 824
 825         spin_lock_irqsave(&par->dirty.lock, flags);
 826         par->dirty.active = true;
 827         spin_unlock_irqrestore(&par->dirty.lock, flags);
 828
 829         /*
 830          * Need to reschedule a dirty update, because otherwise that's
 831          * only done in dirty_mark() if the previous coalesced
 832          * dirty region was empty.
 833          */
 834         schedule_delayed_work(&par->local_work, 0);
 835
 836         return 0;
 837 }