drivers/gpu/drm/qxl/qxl_fb.c

   1 /*
   2  * Copyright © 2013 Red Hat
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *     David Airlie
  25  */
  26 #include <linux/module.h>
  27 #include <linux/fb.h>
  28
  29 #include "drmP.h"
  30 #include "drm/drm.h"
  31 #include "drm/drm_crtc.h"
  32 #include "drm/drm_crtc_helper.h"
  33 #include "qxl_drv.h"
  34
  35 #include "qxl_object.h"
  36 #include "drm_fb_helper.h"
  37
  38 #define QXL_DIRTY_DELAY (HZ / 30)
  39
  40 #define QXL_FB_OP_FILLRECT 1
  41 #define QXL_FB_OP_COPYAREA 2
  42 #define QXL_FB_OP_IMAGEBLIT 3
  43
  44 struct qxl_fb_op {
  45         struct list_head head;
  46         int op_type;
  47         union {
  48                 struct fb_fillrect fr;
  49                 struct fb_copyarea ca;
  50                 struct fb_image ib;
  51         } op;
  52         void *img_data;
  53 };
  54
  55 struct qxl_fbdev {
  56         struct drm_fb_helper helper;
  57         struct qxl_framebuffer  qfb;
  58         struct list_head        fbdev_list;
  59         struct qxl_device       *qdev;
  60
  61         spinlock_t delayed_ops_lock;
  62         struct list_head delayed_ops;
  63         void *shadow;
  64         int size;
  65
  66         /* dirty memory logging */
  67         struct {
  68                 spinlock_t lock;
  69                 bool active;
  70                 unsigned x1;
  71                 unsigned y1;
  72                 unsigned x2;
  73                 unsigned y2;
  74         } dirty;
  75 };
  76
  77 static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
  78                               struct qxl_device *qdev, struct fb_info *info,
  79                               const struct fb_image *image)
  80 {
  81         qxl_fb_image->qdev = qdev;
  82         if (info) {
  83                 qxl_fb_image->visual = info->fix.visual;
  84                 if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
  85                     qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
  86                         memcpy(&qxl_fb_image->pseudo_palette,
  87                                info->pseudo_palette,
  88                                sizeof(qxl_fb_image->pseudo_palette));
  89         } else {
  90                  /* fallback */
  91                 if (image->depth == 1)
  92                         qxl_fb_image->visual = FB_VISUAL_MONO10;
  93                 else
  94                         qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
  95         }
  96         if (image) {
  97                 memcpy(&qxl_fb_image->fb_image, image,
  98                        sizeof(qxl_fb_image->fb_image));
  99         }
 100 }
 101
 102 static void qxl_fb_dirty_flush(struct fb_info *info)
 103 {
 104         struct qxl_fbdev *qfbdev = info->par;
 105         struct qxl_device *qdev = qfbdev->qdev;
 106         struct qxl_fb_image qxl_fb_image;
 107         struct fb_image *image = &qxl_fb_image.fb_image;
 108         u32 x1, x2, y1, y2;
 109
 110         /* TODO: hard coding 32 bpp */
 111         int stride = qfbdev->qfb.base.pitches[0];
 112
 113         x1 = qfbdev->dirty.x1;
 114         x2 = qfbdev->dirty.x2;
 115         y1 = qfbdev->dirty.y1;
 116         y2 = qfbdev->dirty.y2;
 117         /*
 118          * we are using a shadow draw buffer, at qdev->surface0_shadow
 119          */
 120         qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", x1, x2, y1, y2);
 121         image->dx = x1;
 122         image->dy = y1;
 123         image->width = x2 - x1;
 124         image->height = y2 - y1;
 125         image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
 126                                          warnings */
 127         image->bg_color = 0;
 128         image->depth = 32;           /* TODO: take from somewhere? */
 129         image->cmap.start = 0;
 130         image->cmap.len = 0;
 131         image->cmap.red = NULL;
 132         image->cmap.green = NULL;
 133         image->cmap.blue = NULL;
 134         image->cmap.transp = NULL;
 135         image->data = qfbdev->shadow + (x1 * 4) + (stride * y1);
 136
 137         qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
 138         qxl_draw_opaque_fb(&qxl_fb_image, stride);
 139         qfbdev->dirty.x1 = 0;
 140         qfbdev->dirty.x2 = 0;
 141         qfbdev->dirty.y1 = 0;
 142         qfbdev->dirty.y2 = 0;
 143 }
 144
 145 static void qxl_deferred_io(struct fb_info *info,
 146                             struct list_head *pagelist)
 147 {
 148         struct qxl_fbdev *qfbdev = info->par;
 149         unsigned long start, end, min, max;
 150         struct page *page;
 151         int y1, y2;
 152
 153         min = ULONG_MAX;
 154         max = 0;
 155         list_for_each_entry(page, pagelist, lru) {
 156                 start = page->index << PAGE_SHIFT;
 157                 end = start + PAGE_SIZE - 1;
 158                 min = min(min, start);
 159                 max = max(max, end);
 160         }
 161
 162         if (min < max) {
 163                 y1 = min / info->fix.line_length;
 164                 y2 = (max / info->fix.line_length) + 1;
 165
 166                 /* TODO: add spin lock? */
 167                 /* spin_lock_irqsave(&qfbdev->dirty.lock, flags); */
 168                 qfbdev->dirty.x1 = 0;
 169                 qfbdev->dirty.y1 = y1;
 170                 qfbdev->dirty.x2 = info->var.xres;
 171                 qfbdev->dirty.y2 = y2;
 172                 /* spin_unlock_irqrestore(&qfbdev->dirty.lock, flags); */
 173         }
 174
 175         qxl_fb_dirty_flush(info);
 176 };
 177
 178
 179 static struct fb_deferred_io qxl_defio = {
 180         .delay          = QXL_DIRTY_DELAY,
 181         .deferred_io    = qxl_deferred_io,
 182 };
 183
 184 static void qxl_fb_delayed_fillrect(struct qxl_fbdev *qfbdev,
 185                                     const struct fb_fillrect *fb_rect)
 186 {
 187         struct qxl_fb_op *op;
 188         unsigned long flags;
 189
 190         op = kmalloc(sizeof(struct qxl_fb_op), GFP_ATOMIC | __GFP_NOWARN);
 191         if (!op)
 192                 return;
 193
 194         op->op.fr = *fb_rect;
 195         op->img_data = NULL;
 196         op->op_type = QXL_FB_OP_FILLRECT;
 197
 198         spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
 199         list_add_tail(&op->head, &qfbdev->delayed_ops);
 200         spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
 201 }
 202
 203 static void qxl_fb_delayed_copyarea(struct qxl_fbdev *qfbdev,
 204                                     const struct fb_copyarea *fb_copy)
 205 {
 206         struct qxl_fb_op *op;
 207         unsigned long flags;
 208
 209         op = kmalloc(sizeof(struct qxl_fb_op), GFP_ATOMIC | __GFP_NOWARN);
 210         if (!op)
 211                 return;
 212
 213         op->op.ca = *fb_copy;
 214         op->img_data = NULL;
 215         op->op_type = QXL_FB_OP_COPYAREA;
 216
 217         spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
 218         list_add_tail(&op->head, &qfbdev->delayed_ops);
 219         spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
 220 }
 221
 222 static void qxl_fb_delayed_imageblit(struct qxl_fbdev *qfbdev,
 223                                      const struct fb_image *fb_image)
 224 {
 225         struct qxl_fb_op *op;
 226         unsigned long flags;
 227         uint32_t size = fb_image->width * fb_image->height * (fb_image->depth >= 8 ? fb_image->depth / 8 : 1);
 228
 229         op = kmalloc(sizeof(struct qxl_fb_op) + size, GFP_ATOMIC | __GFP_NOWARN);
 230         if (!op)
 231                 return;
 232
 233         op->op.ib = *fb_image;
 234         op->img_data = (void *)(op + 1);
 235         op->op_type = QXL_FB_OP_IMAGEBLIT;
 236
 237         memcpy(op->img_data, fb_image->data, size);
 238
 239         op->op.ib.data = op->img_data;
 240         spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
 241         list_add_tail(&op->head, &qfbdev->delayed_ops);
 242         spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
 243 }
 244
 245 static void qxl_fb_fillrect_internal(struct fb_info *info,
 246                                      const struct fb_fillrect *fb_rect)
 247 {
 248         struct qxl_fbdev *qfbdev = info->par;
 249         struct qxl_device *qdev = qfbdev->qdev;
 250         struct qxl_rect rect;
 251         uint32_t color;
 252         int x = fb_rect->dx;
 253         int y = fb_rect->dy;
 254         int width = fb_rect->width;
 255         int height = fb_rect->height;
 256         uint16_t rop;
 257         struct qxl_draw_fill qxl_draw_fill_rec;
 258
 259         if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 260             info->fix.visual == FB_VISUAL_DIRECTCOLOR)
 261                 color = ((u32 *) (info->pseudo_palette))[fb_rect->color];
 262         else
 263                 color = fb_rect->color;
 264         rect.left = x;
 265         rect.right = x + width;
 266         rect.top = y;
 267         rect.bottom = y + height;
 268         switch (fb_rect->rop) {
 269         case ROP_XOR:
 270                 rop = SPICE_ROPD_OP_XOR;
 271                 break;
 272         case ROP_COPY:
 273                 rop = SPICE_ROPD_OP_PUT;
 274                 break;
 275         default:
 276                 pr_err("qxl_fb_fillrect(): unknown rop, "
 277                        "defaulting to SPICE_ROPD_OP_PUT\n");
 278                 rop = SPICE_ROPD_OP_PUT;
 279         }
 280         qxl_draw_fill_rec.qdev = qdev;
 281         qxl_draw_fill_rec.rect = rect;
 282         qxl_draw_fill_rec.color = color;
 283         qxl_draw_fill_rec.rop = rop;
 284
 285         qxl_draw_fill(&qxl_draw_fill_rec);
 286 }
 287
 288 static void qxl_fb_fillrect(struct fb_info *info,
 289                             const struct fb_fillrect *fb_rect)
 290 {
 291         struct qxl_fbdev *qfbdev = info->par;
 292         struct qxl_device *qdev = qfbdev->qdev;
 293
 294         if (!drm_can_sleep()) {
 295                 qxl_fb_delayed_fillrect(qfbdev, fb_rect);
 296                 schedule_work(&qdev->fb_work);
 297                 return;
 298         }
 299         /* make sure any previous work is done */
 300         flush_work(&qdev->fb_work);
 301         qxl_fb_fillrect_internal(info, fb_rect);
 302 }
 303
 304 static void qxl_fb_copyarea_internal(struct fb_info *info,
 305                                      const struct fb_copyarea *region)
 306 {
 307         struct qxl_fbdev *qfbdev = info->par;
 308
 309         qxl_draw_copyarea(qfbdev->qdev,
 310                           region->width, region->height,
 311                           region->sx, region->sy,
 312                           region->dx, region->dy);
 313 }
 314
 315 static void qxl_fb_copyarea(struct fb_info *info,
 316                             const struct fb_copyarea *region)
 317 {
 318         struct qxl_fbdev *qfbdev = info->par;
 319         struct qxl_device *qdev = qfbdev->qdev;
 320
 321         if (!drm_can_sleep()) {
 322                 qxl_fb_delayed_copyarea(qfbdev, region);
 323                 schedule_work(&qdev->fb_work);
 324                 return;
 325         }
 326         /* make sure any previous work is done */
 327         flush_work(&qdev->fb_work);
 328         qxl_fb_copyarea_internal(info, region);
 329 }
 330
 331 static void qxl_fb_imageblit_safe(struct qxl_fb_image *qxl_fb_image)
 332 {
 333         qxl_draw_opaque_fb(qxl_fb_image, 0);
 334 }
 335
 336 static void qxl_fb_imageblit_internal(struct fb_info *info,
 337                                       const struct fb_image *image)
 338 {
 339         struct qxl_fbdev *qfbdev = info->par;
 340         struct qxl_fb_image qxl_fb_image;
 341
 342         /* ensure proper order  rendering operations - TODO: must do this
 343          * for everything. */
 344         qxl_fb_image_init(&qxl_fb_image, qfbdev->qdev, info, image);
 345         qxl_fb_imageblit_safe(&qxl_fb_image);
 346 }
 347
 348 static void qxl_fb_imageblit(struct fb_info *info,
 349                              const struct fb_image *image)
 350 {
 351         struct qxl_fbdev *qfbdev = info->par;
 352         struct qxl_device *qdev = qfbdev->qdev;
 353
 354         if (!drm_can_sleep()) {
 355                 qxl_fb_delayed_imageblit(qfbdev, image);
 356                 schedule_work(&qdev->fb_work);
 357                 return;
 358         }
 359         /* make sure any previous work is done */
 360         flush_work(&qdev->fb_work);
 361         qxl_fb_imageblit_internal(info, image);
 362 }
 363
 364 static void qxl_fb_work(struct work_struct *work)
 365 {
 366         struct qxl_device *qdev = container_of(work, struct qxl_device, fb_work);
 367         unsigned long flags;
 368         struct qxl_fb_op *entry, *tmp;
 369         struct qxl_fbdev *qfbdev = qdev->mode_info.qfbdev;
 370
 371         /* since the irq context just adds entries to the end of the
 372            list dropping the lock should be fine, as entry isn't modified
 373            in the operation code */
 374         spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
 375         list_for_each_entry_safe(entry, tmp, &qfbdev->delayed_ops, head) {
 376                 spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
 377                 switch (entry->op_type) {
 378                 case QXL_FB_OP_FILLRECT:
 379                         qxl_fb_fillrect_internal(qfbdev->helper.fbdev, &entry->op.fr);
 380                         break;
 381                 case QXL_FB_OP_COPYAREA:
 382                         qxl_fb_copyarea_internal(qfbdev->helper.fbdev, &entry->op.ca);
 383                         break;
 384                 case QXL_FB_OP_IMAGEBLIT:
 385                         qxl_fb_imageblit_internal(qfbdev->helper.fbdev, &entry->op.ib);
 386                         break;
 387                 }
 388                 spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
 389                 list_del(&entry->head);
 390                 kfree(entry);
 391         }
 392         spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
 393 }
 394
 395 int qxl_fb_init(struct qxl_device *qdev)
 396 {
 397         INIT_WORK(&qdev->fb_work, qxl_fb_work);
 398         return 0;
 399 }
 400
 401 static struct fb_ops qxlfb_ops = {
 402         .owner = THIS_MODULE,
 403         .fb_check_var = drm_fb_helper_check_var,
 404         .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
 405         .fb_fillrect = qxl_fb_fillrect,
 406         .fb_copyarea = qxl_fb_copyarea,
 407         .fb_imageblit = qxl_fb_imageblit,
 408         .fb_pan_display = drm_fb_helper_pan_display,
 409         .fb_blank = drm_fb_helper_blank,
 410         .fb_setcmap = drm_fb_helper_setcmap,
 411         .fb_debug_enter = drm_fb_helper_debug_enter,
 412         .fb_debug_leave = drm_fb_helper_debug_leave,
 413 };
 414
 415 static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
 416 {
 417         struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
 418         int ret;
 419
 420         ret = qxl_bo_reserve(qbo, false);
 421         if (likely(ret == 0)) {
 422                 qxl_bo_kunmap(qbo);
 423                 qxl_bo_unpin(qbo);
 424                 qxl_bo_unreserve(qbo);
 425         }
 426         drm_gem_object_unreference_unlocked(gobj);
 427 }
 428
 429 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
 430                                   struct drm_file *file_priv,
 431                                   uint32_t *handle)
 432 {
 433         int r;
 434         struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
 435
 436         BUG_ON(!gobj);
 437         /* drm_get_handle_create adds a reference - good */
 438         r = drm_gem_handle_create(file_priv, gobj, handle);
 439         if (r)
 440                 return r;
 441         return 0;
 442 }
 443
 444 static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
 445                                       struct drm_mode_fb_cmd2 *mode_cmd,
 446                                       struct drm_gem_object **gobj_p)
 447 {
 448         struct qxl_device *qdev = qfbdev->qdev;
 449         struct drm_gem_object *gobj = NULL;
 450         struct qxl_bo *qbo = NULL;
 451         int ret;
 452         int aligned_size, size;
 453         int height = mode_cmd->height;
 454         int bpp;
 455         int depth;
 456
 457         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &bpp, &depth);
 458
 459         size = mode_cmd->pitches[0] * height;
 460         aligned_size = ALIGN(size, PAGE_SIZE);
 461         /* TODO: unallocate and reallocate surface0 for real. Hack to just
 462          * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
 463         ret = qxl_gem_object_create(qdev, aligned_size, 0,
 464                                     QXL_GEM_DOMAIN_SURFACE,
 465                                     false, /* is discardable */
 466                                     false, /* is kernel (false means device) */
 467                                     NULL,
 468                                     &gobj);
 469         if (ret) {
 470                 pr_err("failed to allocate framebuffer (%d)\n",
 471                        aligned_size);
 472                 return -ENOMEM;
 473         }
 474         qbo = gem_to_qxl_bo(gobj);
 475
 476         qbo->surf.width = mode_cmd->width;
 477         qbo->surf.height = mode_cmd->height;
 478         qbo->surf.stride = mode_cmd->pitches[0];
 479         qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
 480         ret = qxl_bo_reserve(qbo, false);
 481         if (unlikely(ret != 0))
 482                 goto out_unref;
 483         ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
 484         if (ret) {
 485                 qxl_bo_unreserve(qbo);
 486                 goto out_unref;
 487         }
 488         ret = qxl_bo_kmap(qbo, NULL);
 489         qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
 490         if (ret)
 491                 goto out_unref;
 492
 493         *gobj_p = gobj;
 494         return 0;
 495 out_unref:
 496         qxlfb_destroy_pinned_object(gobj);
 497         *gobj_p = NULL;
 498         return ret;
 499 }
 500
 501 static int qxlfb_create(struct qxl_fbdev *qfbdev,
 502                         struct drm_fb_helper_surface_size *sizes)
 503 {
 504         struct qxl_device *qdev = qfbdev->qdev;
 505         struct fb_info *info;
 506         struct drm_framebuffer *fb = NULL;
 507         struct drm_mode_fb_cmd2 mode_cmd;
 508         struct drm_gem_object *gobj = NULL;
 509         struct qxl_bo *qbo = NULL;
 510         struct device *device = &qdev->pdev->dev;
 511         int ret;
 512         int size;
 513         int bpp = sizes->surface_bpp;
 514         int depth = sizes->surface_depth;
 515         void *shadow;
 516
 517         mode_cmd.width = sizes->surface_width;
 518         mode_cmd.height = sizes->surface_height;
 519
 520         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
 521         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 522
 523         ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
 524         qbo = gem_to_qxl_bo(gobj);
 525         QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
 526                  mode_cmd.height, mode_cmd.pitches[0]);
 527
 528         shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
 529         /* TODO: what's the usual response to memory allocation errors? */
 530         BUG_ON(!shadow);
 531         QXL_INFO(qdev,
 532         "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
 533                  qxl_bo_gpu_offset(qbo),
 534                  qxl_bo_mmap_offset(qbo),
 535                  qbo->kptr,
 536                  shadow);
 537         size = mode_cmd.pitches[0] * mode_cmd.height;
 538
 539         info = framebuffer_alloc(0, device);
 540         if (info == NULL) {
 541                 ret = -ENOMEM;
 542                 goto out_unref;
 543         }
 544
 545         info->par = qfbdev;
 546
 547         qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj);
 548
 549         fb = &qfbdev->qfb.base;
 550
 551         /* setup helper with fb data */
 552         qfbdev->helper.fb = fb;
 553         qfbdev->helper.fbdev = info;
 554         qfbdev->shadow = shadow;
 555         strcpy(info->fix.id, "qxldrmfb");
 556
 557         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 558
 559         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 560         info->fbops = &qxlfb_ops;
 561
 562         /*
 563          * TODO: using gobj->size in various places in this function. Not sure
 564          * what the difference between the different sizes is.
 565          */
 566         info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
 567         info->fix.smem_len = gobj->size;
 568         info->screen_base = qfbdev->shadow;
 569         info->screen_size = gobj->size;
 570
 571         drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
 572                                sizes->fb_height);
 573
 574         /* setup aperture base/size for vesafb takeover */
 575         info->apertures = alloc_apertures(1);
 576         if (!info->apertures) {
 577                 ret = -ENOMEM;
 578                 goto out_unref;
 579         }
 580         info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
 581         info->apertures->ranges[0].size = qdev->vram_size;
 582
 583         info->fix.mmio_start = 0;
 584         info->fix.mmio_len = 0;
 585
 586         if (info->screen_base == NULL) {
 587                 ret = -ENOSPC;
 588                 goto out_unref;
 589         }
 590
 591         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 592         if (ret) {
 593                 ret = -ENOMEM;
 594                 goto out_unref;
 595         }
 596
 597         info->fbdefio = &qxl_defio;
 598         fb_deferred_io_init(info);
 599
 600         qdev->fbdev_info = info;
 601         qdev->fbdev_qfb = &qfbdev->qfb;
 602         DRM_INFO("fb mappable at 0x%lX, size %lu\n",  info->fix.smem_start, (unsigned long)info->screen_size);
 603         DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
 604         return 0;
 605
 606 out_unref:
 607         if (qbo) {
 608                 ret = qxl_bo_reserve(qbo, false);
 609                 if (likely(ret == 0)) {
 610                         qxl_bo_kunmap(qbo);
 611                         qxl_bo_unpin(qbo);
 612                         qxl_bo_unreserve(qbo);
 613                 }
 614         }
 615         if (fb && ret) {
 616                 drm_gem_object_unreference(gobj);
 617                 drm_framebuffer_cleanup(fb);
 618                 kfree(fb);
 619         }
 620         drm_gem_object_unreference(gobj);
 621         return ret;
 622 }
 623
 624 static int qxl_fb_find_or_create_single(
 625                 struct drm_fb_helper *helper,
 626                 struct drm_fb_helper_surface_size *sizes)
 627 {
 628         struct qxl_fbdev *qfbdev = (struct qxl_fbdev *)helper;
 629         int new_fb = 0;
 630         int ret;
 631
 632         if (!helper->fb) {
 633                 ret = qxlfb_create(qfbdev, sizes);
 634                 if (ret)
 635                         return ret;
 636                 new_fb = 1;
 637         }
 638         return new_fb;
 639 }
 640
 641 static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
 642 {
 643         struct fb_info *info;
 644         struct qxl_framebuffer *qfb = &qfbdev->qfb;
 645
 646         if (qfbdev->helper.fbdev) {
 647                 info = qfbdev->helper.fbdev;
 648
 649                 unregister_framebuffer(info);
 650                 framebuffer_release(info);
 651         }
 652         if (qfb->obj) {
 653                 qxlfb_destroy_pinned_object(qfb->obj);
 654                 qfb->obj = NULL;
 655         }
 656         drm_fb_helper_fini(&qfbdev->helper);
 657         vfree(qfbdev->shadow);
 658         drm_framebuffer_cleanup(&qfb->base);
 659
 660         return 0;
 661 }
 662
 663 static struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
 664         .fb_probe = qxl_fb_find_or_create_single,
 665 };
 666
 667 int qxl_fbdev_init(struct qxl_device *qdev)
 668 {
 669         struct qxl_fbdev *qfbdev;
 670         int bpp_sel = 32; /* TODO: parameter from somewhere? */
 671         int ret;
 672
 673         qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
 674         if (!qfbdev)
 675                 return -ENOMEM;
 676
 677         qfbdev->qdev = qdev;
 678         qdev->mode_info.qfbdev = qfbdev;
 679         qfbdev->helper.funcs = &qxl_fb_helper_funcs;
 680         spin_lock_init(&qfbdev->delayed_ops_lock);
 681         INIT_LIST_HEAD(&qfbdev->delayed_ops);
 682         ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
 683                                  qxl_num_crtc /* num_crtc - QXL supports just 1 */,
 684                                  QXLFB_CONN_LIMIT);
 685         if (ret) {
 686                 kfree(qfbdev);
 687                 return ret;
 688         }
 689
 690         drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
 691         drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
 692         return 0;
 693 }
 694
 695 void qxl_fbdev_fini(struct qxl_device *qdev)
 696 {
 697         if (!qdev->mode_info.qfbdev)
 698                 return;
 699
 700         qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
 701         kfree(qdev->mode_info.qfbdev);
 702         qdev->mode_info.qfbdev = NULL;
 703 }
 704
 705 void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
 706 {
 707         fb_set_suspend(qdev->mode_info.qfbdev->helper.fbdev, state);
 708 }
 709
 710 bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
 711 {
 712         if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
 713                 return true;
 714         return false;
 715 }