drivers/gpu/drm/vmwgfx/vmwgfx_fb.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2007 David Airlie
   4  * Copyright © 2009 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 "drmP.h"
  30 #include "vmwgfx_drv.h"
  31
  32 #include "ttm/ttm_placement.h"
  33
  34 #define VMW_DIRTY_DELAY (HZ / 30)
  35
  36 struct vmw_fb_par {
  37         struct vmw_private *vmw_priv;
  38
  39         void *vmalloc;
  40
  41         struct vmw_dma_buffer *vmw_bo;
  42         struct ttm_bo_kmap_obj map;
  43
  44         u32 pseudo_palette[17];
  45
  46         unsigned depth;
  47         unsigned bpp;
  48
  49         unsigned max_width;
  50         unsigned max_height;
  51
  52         void *bo_ptr;
  53         unsigned bo_size;
  54         bool bo_iowrite;
  55
  56         struct {
  57                 spinlock_t lock;
  58                 bool active;
  59                 unsigned x1;
  60                 unsigned y1;
  61                 unsigned x2;
  62                 unsigned y2;
  63         } dirty;
  64 };
  65
  66 static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
  67                             unsigned blue, unsigned transp,
  68                             struct fb_info *info)
  69 {
  70         struct vmw_fb_par *par = info->par;
  71         u32 *pal = par->pseudo_palette;
  72
  73         if (regno > 15) {
  74                 DRM_ERROR("Bad regno %u.\n", regno);
  75                 return 1;
  76         }
  77
  78         switch (par->depth) {
  79         case 24:
  80         case 32:
  81                 pal[regno] = ((red & 0xff00) << 8) |
  82                               (green & 0xff00) |
  83                              ((blue  & 0xff00) >> 8);
  84                 break;
  85         default:
  86                 DRM_ERROR("Bad depth %u, bpp %u.\n", par->depth, par->bpp);
  87                 return 1;
  88         }
  89
  90         return 0;
  91 }
  92
  93 static int vmw_fb_check_var(struct fb_var_screeninfo *var,
  94                             struct fb_info *info)
  95 {
  96         int depth = var->bits_per_pixel;
  97         struct vmw_fb_par *par = info->par;
  98         struct vmw_private *vmw_priv = par->vmw_priv;
  99
 100         switch (var->bits_per_pixel) {
 101         case 32:
 102                 depth = (var->transp.length > 0) ? 32 : 24;
 103                 break;
 104         default:
 105                 DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
 106                 return -EINVAL;
 107         }
 108
 109         switch (depth) {
 110         case 24:
 111                 var->red.offset = 16;
 112                 var->green.offset = 8;
 113                 var->blue.offset = 0;
 114                 var->red.length = 8;
 115                 var->green.length = 8;
 116                 var->blue.length = 8;
 117                 var->transp.length = 0;
 118                 var->transp.offset = 0;
 119                 break;
 120         case 32:
 121                 var->red.offset = 16;
 122                 var->green.offset = 8;
 123                 var->blue.offset = 0;
 124                 var->red.length = 8;
 125                 var->green.length = 8;
 126                 var->blue.length = 8;
 127                 var->transp.length = 8;
 128                 var->transp.offset = 24;
 129                 break;
 130         default:
 131                 DRM_ERROR("Bad depth %u.\n", depth);
 132                 return -EINVAL;
 133         }
 134
 135         /* without multimon its hard to resize */
 136         if (!(vmw_priv->capabilities & SVGA_CAP_MULTIMON) &&
 137             (var->xres != par->max_width ||
 138              var->yres != par->max_height)) {
 139                 DRM_ERROR("Tried to resize, but we don't have multimon\n");
 140                 return -EINVAL;
 141         }
 142
 143         if (var->xres > par->max_width ||
 144             var->yres > par->max_height) {
 145                 DRM_ERROR("Requested geom can not fit in framebuffer\n");
 146                 return -EINVAL;
 147         }
 148
 149         return 0;
 150 }
 151
 152 static int vmw_fb_set_par(struct fb_info *info)
 153 {
 154         struct vmw_fb_par *par = info->par;
 155         struct vmw_private *vmw_priv = par->vmw_priv;
 156
 157         if (vmw_priv->capabilities & SVGA_CAP_MULTIMON) {
 158                 vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
 159                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
 160                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
 161                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, 0);
 162                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, 0);
 163                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, 0);
 164                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, 0);
 165                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 166
 167                 vmw_write(vmw_priv, SVGA_REG_ENABLE, 1);
 168                 vmw_write(vmw_priv, SVGA_REG_WIDTH, par->max_width);
 169                 vmw_write(vmw_priv, SVGA_REG_HEIGHT, par->max_height);
 170                 vmw_write(vmw_priv, SVGA_REG_BITS_PER_PIXEL, par->bpp);
 171                 vmw_write(vmw_priv, SVGA_REG_DEPTH, par->depth);
 172                 vmw_write(vmw_priv, SVGA_REG_RED_MASK, 0x00ff0000);
 173                 vmw_write(vmw_priv, SVGA_REG_GREEN_MASK, 0x0000ff00);
 174                 vmw_write(vmw_priv, SVGA_REG_BLUE_MASK, 0x000000ff);
 175
 176                 /* TODO check if pitch and offset changes */
 177
 178                 vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
 179                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
 180                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
 181                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
 182                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
 183                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
 184                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
 185                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 186         } else {
 187                 vmw_write(vmw_priv, SVGA_REG_WIDTH, info->var.xres);
 188                 vmw_write(vmw_priv, SVGA_REG_HEIGHT, info->var.yres);
 189
 190                 /* TODO check if pitch and offset changes */
 191         }
 192
 193         return 0;
 194 }
 195
 196 static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
 197                               struct fb_info *info)
 198 {
 199         return 0;
 200 }
 201
 202 static int vmw_fb_blank(int blank, struct fb_info *info)
 203 {
 204         return 0;
 205 }
 206
 207 /*
 208  * Dirty code
 209  */
 210
 211 static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
 212 {
 213         struct vmw_private *vmw_priv = par->vmw_priv;
 214         struct fb_info *info = vmw_priv->fb_info;
 215         int stride = (info->fix.line_length / 4);
 216         int *src = (int *)info->screen_base;
 217         __le32 __iomem *vram_mem = par->bo_ptr;
 218         unsigned long flags;
 219         unsigned x, y, w, h;
 220         int i, k;
 221         struct {
 222                 uint32_t header;
 223                 SVGAFifoCmdUpdate body;
 224         } *cmd;
 225
 226         spin_lock_irqsave(&par->dirty.lock, flags);
 227         if (!par->dirty.active) {
 228                 spin_unlock_irqrestore(&par->dirty.lock, flags);
 229                 return;
 230         }
 231         x = par->dirty.x1;
 232         y = par->dirty.y1;
 233         w = min(par->dirty.x2, info->var.xres) - x;
 234         h = min(par->dirty.y2, info->var.yres) - y;
 235         par->dirty.x1 = par->dirty.x2 = 0;
 236         par->dirty.y1 = par->dirty.y2 = 0;
 237         spin_unlock_irqrestore(&par->dirty.lock, flags);
 238
 239         for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
 240                 for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
 241                         iowrite32(src[k], vram_mem + k);
 242         }
 243
 244 #if 0
 245         DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
 246 #endif
 247
 248         cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
 249         if (unlikely(cmd == NULL)) {
 250                 DRM_ERROR("Fifo reserve failed.\n");
 251                 return;
 252         }
 253
 254         cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
 255         cmd->body.x = cpu_to_le32(x);
 256         cmd->body.y = cpu_to_le32(y);
 257         cmd->body.width = cpu_to_le32(w);
 258         cmd->body.height = cpu_to_le32(h);
 259         vmw_fifo_commit(vmw_priv, sizeof(*cmd));
 260 }
 261
 262 static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
 263                               unsigned x1, unsigned y1,
 264                               unsigned width, unsigned height)
 265 {
 266         struct fb_info *info = par->vmw_priv->fb_info;
 267         unsigned long flags;
 268         unsigned x2 = x1 + width;
 269         unsigned y2 = y1 + height;
 270
 271         spin_lock_irqsave(&par->dirty.lock, flags);
 272         if (par->dirty.x1 == par->dirty.x2) {
 273                 par->dirty.x1 = x1;
 274                 par->dirty.y1 = y1;
 275                 par->dirty.x2 = x2;
 276                 par->dirty.y2 = y2;
 277                 /* if we are active start the dirty work
 278                  * we share the work with the defio system */
 279                 if (par->dirty.active)
 280                         schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
 281         } else {
 282                 if (x1 < par->dirty.x1)
 283                         par->dirty.x1 = x1;
 284                 if (y1 < par->dirty.y1)
 285                         par->dirty.y1 = y1;
 286                 if (x2 > par->dirty.x2)
 287                         par->dirty.x2 = x2;
 288                 if (y2 > par->dirty.y2)
 289                         par->dirty.y2 = y2;
 290         }
 291         spin_unlock_irqrestore(&par->dirty.lock, flags);
 292 }
 293
 294 static void vmw_deferred_io(struct fb_info *info,
 295                             struct list_head *pagelist)
 296 {
 297         struct vmw_fb_par *par = info->par;
 298         unsigned long start, end, min, max;
 299         unsigned long flags;
 300         struct page *page;
 301         int y1, y2;
 302
 303         min = ULONG_MAX;
 304         max = 0;
 305         list_for_each_entry(page, pagelist, lru) {
 306                 start = page->index << PAGE_SHIFT;
 307                 end = start + PAGE_SIZE - 1;
 308                 min = min(min, start);
 309                 max = max(max, end);
 310         }
 311
 312         if (min < max) {
 313                 y1 = min / info->fix.line_length;
 314                 y2 = (max / info->fix.line_length) + 1;
 315
 316                 spin_lock_irqsave(&par->dirty.lock, flags);
 317                 par->dirty.x1 = 0;
 318                 par->dirty.y1 = y1;
 319                 par->dirty.x2 = info->var.xres;
 320                 par->dirty.y2 = y2;
 321                 spin_unlock_irqrestore(&par->dirty.lock, flags);
 322         }
 323
 324         vmw_fb_dirty_flush(par);
 325 };
 326
 327 struct fb_deferred_io vmw_defio = {
 328         .delay          = VMW_DIRTY_DELAY,
 329         .deferred_io    = vmw_deferred_io,
 330 };
 331
 332 /*
 333  * Draw code
 334  */
 335
 336 static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 337 {
 338         cfb_fillrect(info, rect);
 339         vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
 340                           rect->width, rect->height);
 341 }
 342
 343 static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
 344 {
 345         cfb_copyarea(info, region);
 346         vmw_fb_dirty_mark(info->par, region->dx, region->dy,
 347                           region->width, region->height);
 348 }
 349
 350 static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
 351 {
 352         cfb_imageblit(info, image);
 353         vmw_fb_dirty_mark(info->par, image->dx, image->dy,
 354                           image->width, image->height);
 355 }
 356
 357 /*
 358  * Bring up code
 359  */
 360
 361 static struct fb_ops vmw_fb_ops = {
 362         .owner = THIS_MODULE,
 363         .fb_check_var = vmw_fb_check_var,
 364         .fb_set_par = vmw_fb_set_par,
 365         .fb_setcolreg = vmw_fb_setcolreg,
 366         .fb_fillrect = vmw_fb_fillrect,
 367         .fb_copyarea = vmw_fb_copyarea,
 368         .fb_imageblit = vmw_fb_imageblit,
 369         .fb_pan_display = vmw_fb_pan_display,
 370         .fb_blank = vmw_fb_blank,
 371 };
 372
 373 static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
 374                             size_t size, struct vmw_dma_buffer **out)
 375 {
 376         struct vmw_dma_buffer *vmw_bo;
 377         struct ttm_placement ne_placement = vmw_vram_ne_placement;
 378         int ret;
 379
 380         ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 381
 382         /* interuptable? */
 383         ret = ttm_write_lock(&vmw_priv->fbdev_master.lock, false);
 384         if (unlikely(ret != 0))
 385                 return ret;
 386
 387         vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
 388         if (!vmw_bo)
 389                 goto err_unlock;
 390
 391         ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
 392                               &ne_placement,
 393                               false,
 394                               &vmw_dmabuf_bo_free);
 395         if (unlikely(ret != 0))
 396                 goto err_unlock; /* init frees the buffer on failure */
 397
 398         *out = vmw_bo;
 399
 400         ttm_write_unlock(&vmw_priv->fbdev_master.lock);
 401
 402         return 0;
 403
 404 err_unlock:
 405         ttm_write_unlock(&vmw_priv->fbdev_master.lock);
 406         return ret;
 407 }
 408
 409 int vmw_fb_init(struct vmw_private *vmw_priv)
 410 {
 411         struct device *device = &vmw_priv->dev->pdev->dev;
 412         struct vmw_fb_par *par;
 413         struct fb_info *info;
 414         unsigned initial_width, initial_height;
 415         unsigned fb_width, fb_height;
 416         unsigned fb_bbp, fb_depth, fb_offset, fb_pitch, fb_size;
 417         int ret;
 418
 419         initial_width = 800;
 420         initial_height = 600;
 421
 422         fb_bbp = 32;
 423         fb_depth = 24;
 424
 425         if (vmw_priv->capabilities & SVGA_CAP_MULTIMON) {
 426                 fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
 427                 fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
 428         } else {
 429                 fb_width = min(vmw_priv->fb_max_width, initial_width);
 430                 fb_height = min(vmw_priv->fb_max_height, initial_height);
 431         }
 432
 433         initial_width = min(fb_width, initial_width);
 434         initial_height = min(fb_height, initial_height);
 435
 436         vmw_write(vmw_priv, SVGA_REG_WIDTH, fb_width);
 437         vmw_write(vmw_priv, SVGA_REG_HEIGHT, fb_height);
 438         vmw_write(vmw_priv, SVGA_REG_BITS_PER_PIXEL, fb_bbp);
 439         vmw_write(vmw_priv, SVGA_REG_DEPTH, fb_depth);
 440         vmw_write(vmw_priv, SVGA_REG_RED_MASK, 0x00ff0000);
 441         vmw_write(vmw_priv, SVGA_REG_GREEN_MASK, 0x0000ff00);
 442         vmw_write(vmw_priv, SVGA_REG_BLUE_MASK, 0x000000ff);
 443
 444         fb_size = vmw_read(vmw_priv, SVGA_REG_FB_SIZE);
 445         fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);
 446         fb_pitch = vmw_read(vmw_priv, SVGA_REG_BYTES_PER_LINE);
 447
 448         DRM_DEBUG("width  %u\n", vmw_read(vmw_priv, SVGA_REG_MAX_WIDTH));
 449         DRM_DEBUG("height %u\n", vmw_read(vmw_priv, SVGA_REG_MAX_HEIGHT));
 450         DRM_DEBUG("width  %u\n", vmw_read(vmw_priv, SVGA_REG_WIDTH));
 451         DRM_DEBUG("height %u\n", vmw_read(vmw_priv, SVGA_REG_HEIGHT));
 452         DRM_DEBUG("bpp    %u\n", vmw_read(vmw_priv, SVGA_REG_BITS_PER_PIXEL));
 453         DRM_DEBUG("depth  %u\n", vmw_read(vmw_priv, SVGA_REG_DEPTH));
 454         DRM_DEBUG("bpl    %u\n", vmw_read(vmw_priv, SVGA_REG_BYTES_PER_LINE));
 455         DRM_DEBUG("r mask %08x\n", vmw_read(vmw_priv, SVGA_REG_RED_MASK));
 456         DRM_DEBUG("g mask %08x\n", vmw_read(vmw_priv, SVGA_REG_GREEN_MASK));
 457         DRM_DEBUG("b mask %08x\n", vmw_read(vmw_priv, SVGA_REG_BLUE_MASK));
 458         DRM_DEBUG("fb_offset 0x%08x\n", fb_offset);
 459         DRM_DEBUG("fb_pitch  %u\n", fb_pitch);
 460         DRM_DEBUG("fb_size   %u kiB\n", fb_size / 1024);
 461
 462         info = framebuffer_alloc(sizeof(*par), device);
 463         if (!info)
 464                 return -ENOMEM;
 465
 466         /*
 467          * Par
 468          */
 469         vmw_priv->fb_info = info;
 470         par = info->par;
 471         par->vmw_priv = vmw_priv;
 472         par->depth = fb_depth;
 473         par->bpp = fb_bbp;
 474         par->vmalloc = NULL;
 475         par->max_width = fb_width;
 476         par->max_height = fb_height;
 477
 478         /*
 479          * Create buffers and alloc memory
 480          */
 481         par->vmalloc = vmalloc(fb_size);
 482         if (unlikely(par->vmalloc == NULL)) {
 483                 ret = -ENOMEM;
 484                 goto err_free;
 485         }
 486
 487         ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
 488         if (unlikely(ret != 0))
 489                 goto err_free;
 490
 491         ret = ttm_bo_kmap(&par->vmw_bo->base,
 492                           0,
 493                           par->vmw_bo->base.num_pages,
 494                           &par->map);
 495         if (unlikely(ret != 0))
 496                 goto err_unref;
 497         par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
 498         par->bo_size = fb_size;
 499
 500         /*
 501          * Fixed and var
 502          */
 503         strcpy(info->fix.id, "svgadrmfb");
 504         info->fix.type = FB_TYPE_PACKED_PIXELS;
 505         info->fix.visual = FB_VISUAL_TRUECOLOR;
 506         info->fix.type_aux = 0;
 507         info->fix.xpanstep = 1; /* doing it in hw */
 508         info->fix.ypanstep = 1; /* doing it in hw */
 509         info->fix.ywrapstep = 0;
 510         info->fix.accel = FB_ACCEL_NONE;
 511         info->fix.line_length = fb_pitch;
 512
 513         info->fix.smem_start = 0;
 514         info->fix.smem_len = fb_size;
 515
 516         info->fix.mmio_start = 0;
 517         info->fix.mmio_len = 0;
 518
 519         info->pseudo_palette = par->pseudo_palette;
 520         info->screen_base = par->vmalloc;
 521         info->screen_size = fb_size;
 522
 523         info->flags = FBINFO_DEFAULT;
 524         info->fbops = &vmw_fb_ops;
 525
 526         /* 24 depth per default */
 527         info->var.red.offset = 16;
 528         info->var.green.offset = 8;
 529         info->var.blue.offset = 0;
 530         info->var.red.length = 8;
 531         info->var.green.length = 8;
 532         info->var.blue.length = 8;
 533         info->var.transp.offset = 0;
 534         info->var.transp.length = 0;
 535
 536         info->var.xres_virtual = fb_width;
 537         info->var.yres_virtual = fb_height;
 538         info->var.bits_per_pixel = par->bpp;
 539         info->var.xoffset = 0;
 540         info->var.yoffset = 0;
 541         info->var.activate = FB_ACTIVATE_NOW;
 542         info->var.height = -1;
 543         info->var.width = -1;
 544
 545         info->var.xres = initial_width;
 546         info->var.yres = initial_height;
 547
 548 #if 0
 549         info->pixmap.size = 64*1024;
 550         info->pixmap.buf_align = 8;
 551         info->pixmap.access_align = 32;
 552         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 553         info->pixmap.scan_align = 1;
 554 #else
 555         info->pixmap.size = 0;
 556         info->pixmap.buf_align = 8;
 557         info->pixmap.access_align = 32;
 558         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 559         info->pixmap.scan_align = 1;
 560 #endif
 561
 562         info->apertures = alloc_apertures(1);
 563         if (!info->apertures) {
 564                 ret = -ENOMEM;
 565                 goto err_aper;
 566         }
 567         info->apertures->ranges[0].base = vmw_priv->vram_start;
 568         info->apertures->ranges[0].size = vmw_priv->vram_size;
 569
 570         /*
 571          * Dirty & Deferred IO
 572          */
 573         par->dirty.x1 = par->dirty.x2 = 0;
 574         par->dirty.y1 = par->dirty.y1 = 0;
 575         par->dirty.active = true;
 576         spin_lock_init(&par->dirty.lock);
 577         info->fbdefio = &vmw_defio;
 578         fb_deferred_io_init(info);
 579
 580         ret = register_framebuffer(info);
 581         if (unlikely(ret != 0))
 582                 goto err_defio;
 583
 584         return 0;
 585
 586 err_defio:
 587         fb_deferred_io_cleanup(info);
 588 err_aper:
 589         ttm_bo_kunmap(&par->map);
 590 err_unref:
 591         ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
 592 err_free:
 593         vfree(par->vmalloc);
 594         framebuffer_release(info);
 595         vmw_priv->fb_info = NULL;
 596
 597         return ret;
 598 }
 599
 600 int vmw_fb_close(struct vmw_private *vmw_priv)
 601 {
 602         struct fb_info *info;
 603         struct vmw_fb_par *par;
 604         struct ttm_buffer_object *bo;
 605
 606         if (!vmw_priv->fb_info)
 607                 return 0;
 608
 609         info = vmw_priv->fb_info;
 610         par = info->par;
 611         bo = &par->vmw_bo->base;
 612         par->vmw_bo = NULL;
 613
 614         /* ??? order */
 615         fb_deferred_io_cleanup(info);
 616         unregister_framebuffer(info);
 617
 618         ttm_bo_kunmap(&par->map);
 619         ttm_bo_unref(&bo);
 620
 621         vfree(par->vmalloc);
 622         framebuffer_release(info);
 623
 624         return 0;
 625 }
 626
 627 int vmw_dmabuf_from_vram(struct vmw_private *vmw_priv,
 628                          struct vmw_dma_buffer *vmw_bo)
 629 {
 630         struct ttm_buffer_object *bo = &vmw_bo->base;
 631         int ret = 0;
 632
 633         ret = ttm_bo_reserve(bo, false, false, false, 0);
 634         if (unlikely(ret != 0))
 635                 return ret;
 636
 637         ret = ttm_bo_validate(bo, &vmw_sys_placement, false, false, false);
 638         ttm_bo_unreserve(bo);
 639
 640         return ret;
 641 }
 642
 643 int vmw_dmabuf_to_start_of_vram(struct vmw_private *vmw_priv,
 644                                 struct vmw_dma_buffer *vmw_bo)
 645 {
 646         struct ttm_buffer_object *bo = &vmw_bo->base;
 647         struct ttm_placement ne_placement = vmw_vram_ne_placement;
 648         int ret = 0;
 649
 650         ne_placement.lpfn = bo->num_pages;
 651
 652         /* interuptable? */
 653         ret = ttm_write_lock(&vmw_priv->active_master->lock, false);
 654         if (unlikely(ret != 0))
 655                 return ret;
 656
 657         ret = ttm_bo_reserve(bo, false, false, false, 0);
 658         if (unlikely(ret != 0))
 659                 goto err_unlock;
 660
 661         ret = ttm_bo_validate(bo, &ne_placement, false, false, false);
 662         ttm_bo_unreserve(bo);
 663 err_unlock:
 664         ttm_write_unlock(&vmw_priv->active_master->lock);
 665
 666         return ret;
 667 }
 668
 669 int vmw_fb_off(struct vmw_private *vmw_priv)
 670 {
 671         struct fb_info *info;
 672         struct vmw_fb_par *par;
 673         unsigned long flags;
 674
 675         if (!vmw_priv->fb_info)
 676                 return -EINVAL;
 677
 678         info = vmw_priv->fb_info;
 679         par = info->par;
 680
 681         spin_lock_irqsave(&par->dirty.lock, flags);
 682         par->dirty.active = false;
 683         spin_unlock_irqrestore(&par->dirty.lock, flags);
 684
 685         flush_scheduled_work();
 686
 687         par->bo_ptr = NULL;
 688         ttm_bo_kunmap(&par->map);
 689
 690         vmw_dmabuf_from_vram(vmw_priv, par->vmw_bo);
 691
 692         return 0;
 693 }
 694
 695 int vmw_fb_on(struct vmw_private *vmw_priv)
 696 {
 697         struct fb_info *info;
 698         struct vmw_fb_par *par;
 699         unsigned long flags;
 700         bool dummy;
 701         int ret;
 702
 703         if (!vmw_priv->fb_info)
 704                 return -EINVAL;
 705
 706         info = vmw_priv->fb_info;
 707         par = info->par;
 708
 709         /* we are already active */
 710         if (par->bo_ptr != NULL)
 711                 return 0;
 712
 713         /* Make sure that all overlays are stoped when we take over */
 714         vmw_overlay_stop_all(vmw_priv);
 715
 716         ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo);
 717         if (unlikely(ret != 0)) {
 718                 DRM_ERROR("could not move buffer to start of VRAM\n");
 719                 goto err_no_buffer;
 720         }
 721
 722         ret = ttm_bo_kmap(&par->vmw_bo->base,
 723                           0,
 724                           par->vmw_bo->base.num_pages,
 725                           &par->map);
 726         BUG_ON(ret != 0);
 727         par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &dummy);
 728
 729         spin_lock_irqsave(&par->dirty.lock, flags);
 730         par->dirty.active = true;
 731         spin_unlock_irqrestore(&par->dirty.lock, flags);
 732
 733 err_no_buffer:
 734         vmw_fb_set_par(info);
 735
 736         vmw_fb_dirty_mark(par, 0, 0, info->var.xres, info->var.yres);
 737
 738         /* If there already was stuff dirty we wont
 739          * schedule a new work, so lets do it now */
 740         schedule_delayed_work(&info->deferred_work, 0);
 741
 742         return 0;
 743 }