linux/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
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   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
  39struct 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
  72static 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
 101static 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
 159static 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 */
 175static 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
 255out_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        }
 263out_unlock:
 264        mutex_unlock(&par->bo_mutex);
 265}
 266
 267static 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
 299static 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
 321static 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
 359static 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
 368static 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
 375static 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
 382static 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
 393static 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,
 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
 419err_unlock:
 420        ttm_write_unlock(&vmw_priv->reservation_sem);
 421        return ret;
 422}
 423
 424static 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
 439static 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
 447restart:
 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
 461static 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
 499static 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
 556static 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
 616out_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
 627static 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
 639int 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
 761err_defio:
 762        fb_deferred_io_cleanup(info);
 763err_aper:
 764err_free:
 765        vfree(par->vmalloc);
 766err_kms:
 767        framebuffer_release(info);
 768        vmw_priv->fb_info = NULL;
 769
 770        return ret;
 771}
 772
 773int 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
 799int 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
 821int 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}
 846