drivers/gpu/drm/vmwgfx/vmwgfx_resource.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include "vmwgfx_drm.h"
  30 #include "ttm/ttm_object.h"
  31 #include "ttm/ttm_placement.h"
  32 #include "drmP.h"
  33
  34 #define VMW_RES_CONTEXT ttm_driver_type0
  35 #define VMW_RES_SURFACE ttm_driver_type1
  36 #define VMW_RES_STREAM ttm_driver_type2
  37
  38 struct vmw_user_context {
  39         struct ttm_base_object base;
  40         struct vmw_resource res;
  41 };
  42
  43 struct vmw_user_surface {
  44         struct ttm_base_object base;
  45         struct vmw_surface srf;
  46 };
  47
  48 struct vmw_user_dma_buffer {
  49         struct ttm_base_object base;
  50         struct vmw_dma_buffer dma;
  51 };
  52
  53 struct vmw_bo_user_rep {
  54         uint32_t handle;
  55         uint64_t map_handle;
  56 };
  57
  58 struct vmw_stream {
  59         struct vmw_resource res;
  60         uint32_t stream_id;
  61 };
  62
  63 struct vmw_user_stream {
  64         struct ttm_base_object base;
  65         struct vmw_stream stream;
  66 };
  67
  68 static inline struct vmw_dma_buffer *
  69 vmw_dma_buffer(struct ttm_buffer_object *bo)
  70 {
  71         return container_of(bo, struct vmw_dma_buffer, base);
  72 }
  73
  74 static inline struct vmw_user_dma_buffer *
  75 vmw_user_dma_buffer(struct ttm_buffer_object *bo)
  76 {
  77         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
  78         return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
  79 }
  80
  81 struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
  82 {
  83         kref_get(&res->kref);
  84         return res;
  85 }
  86
  87 static void vmw_resource_release(struct kref *kref)
  88 {
  89         struct vmw_resource *res =
  90             container_of(kref, struct vmw_resource, kref);
  91         struct vmw_private *dev_priv = res->dev_priv;
  92
  93         idr_remove(res->idr, res->id);
  94         write_unlock(&dev_priv->resource_lock);
  95
  96         if (likely(res->hw_destroy != NULL))
  97                 res->hw_destroy(res);
  98
  99         if (res->res_free != NULL)
 100                 res->res_free(res);
 101         else
 102                 kfree(res);
 103
 104         write_lock(&dev_priv->resource_lock);
 105 }
 106
 107 void vmw_resource_unreference(struct vmw_resource **p_res)
 108 {
 109         struct vmw_resource *res = *p_res;
 110         struct vmw_private *dev_priv = res->dev_priv;
 111
 112         *p_res = NULL;
 113         write_lock(&dev_priv->resource_lock);
 114         kref_put(&res->kref, vmw_resource_release);
 115         write_unlock(&dev_priv->resource_lock);
 116 }
 117
 118 static int vmw_resource_init(struct vmw_private *dev_priv,
 119                              struct vmw_resource *res,
 120                              struct idr *idr,
 121                              enum ttm_object_type obj_type,
 122                              void (*res_free) (struct vmw_resource *res))
 123 {
 124         int ret;
 125
 126         kref_init(&res->kref);
 127         res->hw_destroy = NULL;
 128         res->res_free = res_free;
 129         res->res_type = obj_type;
 130         res->idr = idr;
 131         res->avail = false;
 132         res->dev_priv = dev_priv;
 133
 134         do {
 135                 if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
 136                         return -ENOMEM;
 137
 138                 write_lock(&dev_priv->resource_lock);
 139                 ret = idr_get_new_above(idr, res, 1, &res->id);
 140                 write_unlock(&dev_priv->resource_lock);
 141
 142         } while (ret == -EAGAIN);
 143
 144         return ret;
 145 }
 146
 147 /**
 148  * vmw_resource_activate
 149  *
 150  * @res:        Pointer to the newly created resource
 151  * @hw_destroy: Destroy function. NULL if none.
 152  *
 153  * Activate a resource after the hardware has been made aware of it.
 154  * Set tye destroy function to @destroy. Typically this frees the
 155  * resource and destroys the hardware resources associated with it.
 156  * Activate basically means that the function vmw_resource_lookup will
 157  * find it.
 158  */
 159
 160 static void vmw_resource_activate(struct vmw_resource *res,
 161                                   void (*hw_destroy) (struct vmw_resource *))
 162 {
 163         struct vmw_private *dev_priv = res->dev_priv;
 164
 165         write_lock(&dev_priv->resource_lock);
 166         res->avail = true;
 167         res->hw_destroy = hw_destroy;
 168         write_unlock(&dev_priv->resource_lock);
 169 }
 170
 171 struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv,
 172                                          struct idr *idr, int id)
 173 {
 174         struct vmw_resource *res;
 175
 176         read_lock(&dev_priv->resource_lock);
 177         res = idr_find(idr, id);
 178         if (res && res->avail)
 179                 kref_get(&res->kref);
 180         else
 181                 res = NULL;
 182         read_unlock(&dev_priv->resource_lock);
 183
 184         if (unlikely(res == NULL))
 185                 return NULL;
 186
 187         return res;
 188 }
 189
 190 /**
 191  * Context management:
 192  */
 193
 194 static void vmw_hw_context_destroy(struct vmw_resource *res)
 195 {
 196
 197         struct vmw_private *dev_priv = res->dev_priv;
 198         struct {
 199                 SVGA3dCmdHeader header;
 200                 SVGA3dCmdDestroyContext body;
 201         } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 202
 203         if (unlikely(cmd == NULL)) {
 204                 DRM_ERROR("Failed reserving FIFO space for surface "
 205                           "destruction.\n");
 206                 return;
 207         }
 208
 209         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
 210         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 211         cmd->body.cid = cpu_to_le32(res->id);
 212
 213         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 214         vmw_3d_resource_dec(dev_priv);
 215 }
 216
 217 static int vmw_context_init(struct vmw_private *dev_priv,
 218                             struct vmw_resource *res,
 219                             void (*res_free) (struct vmw_resource *res))
 220 {
 221         int ret;
 222
 223         struct {
 224                 SVGA3dCmdHeader header;
 225                 SVGA3dCmdDefineContext body;
 226         } *cmd;
 227
 228         ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
 229                                 VMW_RES_CONTEXT, res_free);
 230
 231         if (unlikely(ret != 0)) {
 232                 if (res_free == NULL)
 233                         kfree(res);
 234                 else
 235                         res_free(res);
 236                 return ret;
 237         }
 238
 239         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 240         if (unlikely(cmd == NULL)) {
 241                 DRM_ERROR("Fifo reserve failed.\n");
 242                 vmw_resource_unreference(&res);
 243                 return -ENOMEM;
 244         }
 245
 246         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 247         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 248         cmd->body.cid = cpu_to_le32(res->id);
 249
 250         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 251         (void) vmw_3d_resource_inc(dev_priv);
 252         vmw_resource_activate(res, vmw_hw_context_destroy);
 253         return 0;
 254 }
 255
 256 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 257 {
 258         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 259         int ret;
 260
 261         if (unlikely(res == NULL))
 262                 return NULL;
 263
 264         ret = vmw_context_init(dev_priv, res, NULL);
 265         return (ret == 0) ? res : NULL;
 266 }
 267
 268 /**
 269  * User-space context management:
 270  */
 271
 272 static void vmw_user_context_free(struct vmw_resource *res)
 273 {
 274         struct vmw_user_context *ctx =
 275             container_of(res, struct vmw_user_context, res);
 276
 277         kfree(ctx);
 278 }
 279
 280 /**
 281  * This function is called when user space has no more references on the
 282  * base object. It releases the base-object's reference on the resource object.
 283  */
 284
 285 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 286 {
 287         struct ttm_base_object *base = *p_base;
 288         struct vmw_user_context *ctx =
 289             container_of(base, struct vmw_user_context, base);
 290         struct vmw_resource *res = &ctx->res;
 291
 292         *p_base = NULL;
 293         vmw_resource_unreference(&res);
 294 }
 295
 296 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 297                               struct drm_file *file_priv)
 298 {
 299         struct vmw_private *dev_priv = vmw_priv(dev);
 300         struct vmw_resource *res;
 301         struct vmw_user_context *ctx;
 302         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 303         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 304         int ret = 0;
 305
 306         res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
 307         if (unlikely(res == NULL))
 308                 return -EINVAL;
 309
 310         if (res->res_free != &vmw_user_context_free) {
 311                 ret = -EINVAL;
 312                 goto out;
 313         }
 314
 315         ctx = container_of(res, struct vmw_user_context, res);
 316         if (ctx->base.tfile != tfile && !ctx->base.shareable) {
 317                 ret = -EPERM;
 318                 goto out;
 319         }
 320
 321         ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
 322 out:
 323         vmw_resource_unreference(&res);
 324         return ret;
 325 }
 326
 327 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 328                              struct drm_file *file_priv)
 329 {
 330         struct vmw_private *dev_priv = vmw_priv(dev);
 331         struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 332         struct vmw_resource *res;
 333         struct vmw_resource *tmp;
 334         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 335         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 336         int ret;
 337
 338         if (unlikely(ctx == NULL))
 339                 return -ENOMEM;
 340
 341         res = &ctx->res;
 342         ctx->base.shareable = false;
 343         ctx->base.tfile = NULL;
 344
 345         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 346         if (unlikely(ret != 0))
 347                 return ret;
 348
 349         tmp = vmw_resource_reference(&ctx->res);
 350         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 351                                    &vmw_user_context_base_release, NULL);
 352
 353         if (unlikely(ret != 0)) {
 354                 vmw_resource_unreference(&tmp);
 355                 goto out_err;
 356         }
 357
 358         arg->cid = res->id;
 359 out_err:
 360         vmw_resource_unreference(&res);
 361         return ret;
 362
 363 }
 364
 365 int vmw_context_check(struct vmw_private *dev_priv,
 366                       struct ttm_object_file *tfile,
 367                       int id)
 368 {
 369         struct vmw_resource *res;
 370         int ret = 0;
 371
 372         read_lock(&dev_priv->resource_lock);
 373         res = idr_find(&dev_priv->context_idr, id);
 374         if (res && res->avail) {
 375                 struct vmw_user_context *ctx =
 376                         container_of(res, struct vmw_user_context, res);
 377                 if (ctx->base.tfile != tfile && !ctx->base.shareable)
 378                         ret = -EPERM;
 379         } else
 380                 ret = -EINVAL;
 381         read_unlock(&dev_priv->resource_lock);
 382
 383         return ret;
 384 }
 385
 386
 387 /**
 388  * Surface management.
 389  */
 390
 391 static void vmw_hw_surface_destroy(struct vmw_resource *res)
 392 {
 393
 394         struct vmw_private *dev_priv = res->dev_priv;
 395         struct {
 396                 SVGA3dCmdHeader header;
 397                 SVGA3dCmdDestroySurface body;
 398         } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 399
 400         if (unlikely(cmd == NULL)) {
 401                 DRM_ERROR("Failed reserving FIFO space for surface "
 402                           "destruction.\n");
 403                 return;
 404         }
 405
 406         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY);
 407         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 408         cmd->body.sid = cpu_to_le32(res->id);
 409
 410         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 411         vmw_3d_resource_dec(dev_priv);
 412 }
 413
 414 void vmw_surface_res_free(struct vmw_resource *res)
 415 {
 416         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 417
 418         kfree(srf->sizes);
 419         kfree(srf->snooper.image);
 420         kfree(srf);
 421 }
 422
 423 int vmw_surface_init(struct vmw_private *dev_priv,
 424                      struct vmw_surface *srf,
 425                      void (*res_free) (struct vmw_resource *res))
 426 {
 427         int ret;
 428         struct {
 429                 SVGA3dCmdHeader header;
 430                 SVGA3dCmdDefineSurface body;
 431         } *cmd;
 432         SVGA3dSize *cmd_size;
 433         struct vmw_resource *res = &srf->res;
 434         struct drm_vmw_size *src_size;
 435         size_t submit_size;
 436         uint32_t cmd_len;
 437         int i;
 438
 439         BUG_ON(res_free == NULL);
 440         ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
 441                                 VMW_RES_SURFACE, res_free);
 442
 443         if (unlikely(ret != 0)) {
 444                 res_free(res);
 445                 return ret;
 446         }
 447
 448         submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize);
 449         cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize);
 450
 451         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 452         if (unlikely(cmd == NULL)) {
 453                 DRM_ERROR("Fifo reserve failed for create surface.\n");
 454                 vmw_resource_unreference(&res);
 455                 return -ENOMEM;
 456         }
 457
 458         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE);
 459         cmd->header.size = cpu_to_le32(cmd_len);
 460         cmd->body.sid = cpu_to_le32(res->id);
 461         cmd->body.surfaceFlags = cpu_to_le32(srf->flags);
 462         cmd->body.format = cpu_to_le32(srf->format);
 463         for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {
 464                 cmd->body.face[i].numMipLevels =
 465                     cpu_to_le32(srf->mip_levels[i]);
 466         }
 467
 468         cmd += 1;
 469         cmd_size = (SVGA3dSize *) cmd;
 470         src_size = srf->sizes;
 471
 472         for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) {
 473                 cmd_size->width = cpu_to_le32(src_size->width);
 474                 cmd_size->height = cpu_to_le32(src_size->height);
 475                 cmd_size->depth = cpu_to_le32(src_size->depth);
 476         }
 477
 478         vmw_fifo_commit(dev_priv, submit_size);
 479         (void) vmw_3d_resource_inc(dev_priv);
 480         vmw_resource_activate(res, vmw_hw_surface_destroy);
 481         return 0;
 482 }
 483
 484 static void vmw_user_surface_free(struct vmw_resource *res)
 485 {
 486         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 487         struct vmw_user_surface *user_srf =
 488             container_of(srf, struct vmw_user_surface, srf);
 489
 490         kfree(srf->sizes);
 491         kfree(srf->snooper.image);
 492         kfree(user_srf);
 493 }
 494
 495 int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
 496                                    struct ttm_object_file *tfile,
 497                                    uint32_t handle, struct vmw_surface **out)
 498 {
 499         struct vmw_resource *res;
 500         struct vmw_surface *srf;
 501         struct vmw_user_surface *user_srf;
 502         struct ttm_base_object *base;
 503         int ret = -EINVAL;
 504
 505         base = ttm_base_object_lookup(tfile, handle);
 506         if (unlikely(base == NULL))
 507                 return -EINVAL;
 508
 509         if (unlikely(base->object_type != VMW_RES_SURFACE))
 510                 goto out_bad_resource;
 511
 512         user_srf = container_of(base, struct vmw_user_surface, base);
 513         srf = &user_srf->srf;
 514         res = &srf->res;
 515
 516         read_lock(&dev_priv->resource_lock);
 517
 518         if (!res->avail || res->res_free != &vmw_user_surface_free) {
 519                 read_unlock(&dev_priv->resource_lock);
 520                 goto out_bad_resource;
 521         }
 522
 523         kref_get(&res->kref);
 524         read_unlock(&dev_priv->resource_lock);
 525
 526         *out = srf;
 527         ret = 0;
 528
 529 out_bad_resource:
 530         ttm_base_object_unref(&base);
 531
 532         return ret;
 533 }
 534
 535 static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
 536 {
 537         struct ttm_base_object *base = *p_base;
 538         struct vmw_user_surface *user_srf =
 539             container_of(base, struct vmw_user_surface, base);
 540         struct vmw_resource *res = &user_srf->srf.res;
 541
 542         *p_base = NULL;
 543         vmw_resource_unreference(&res);
 544 }
 545
 546 int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
 547                               struct drm_file *file_priv)
 548 {
 549         struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data;
 550         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 551
 552         return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
 553 }
 554
 555 int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 556                              struct drm_file *file_priv)
 557 {
 558         struct vmw_private *dev_priv = vmw_priv(dev);
 559         struct vmw_user_surface *user_srf =
 560             kmalloc(sizeof(*user_srf), GFP_KERNEL);
 561         struct vmw_surface *srf;
 562         struct vmw_resource *res;
 563         struct vmw_resource *tmp;
 564         union drm_vmw_surface_create_arg *arg =
 565             (union drm_vmw_surface_create_arg *)data;
 566         struct drm_vmw_surface_create_req *req = &arg->req;
 567         struct drm_vmw_surface_arg *rep = &arg->rep;
 568         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 569         struct drm_vmw_size __user *user_sizes;
 570         int ret;
 571         int i;
 572
 573         if (unlikely(user_srf == NULL))
 574                 return -ENOMEM;
 575
 576         srf = &user_srf->srf;
 577         res = &srf->res;
 578
 579         srf->flags = req->flags;
 580         srf->format = req->format;
 581         srf->scanout = req->scanout;
 582         memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels));
 583         srf->num_sizes = 0;
 584         for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i)
 585                 srf->num_sizes += srf->mip_levels[i];
 586
 587         if (srf->num_sizes > DRM_VMW_MAX_SURFACE_FACES *
 588             DRM_VMW_MAX_MIP_LEVELS) {
 589                 ret = -EINVAL;
 590                 goto out_err0;
 591         }
 592
 593         srf->sizes = kmalloc(srf->num_sizes * sizeof(*srf->sizes), GFP_KERNEL);
 594         if (unlikely(srf->sizes == NULL)) {
 595                 ret = -ENOMEM;
 596                 goto out_err0;
 597         }
 598
 599         user_sizes = (struct drm_vmw_size __user *)(unsigned long)
 600             req->size_addr;
 601
 602         ret = copy_from_user(srf->sizes, user_sizes,
 603                              srf->num_sizes * sizeof(*srf->sizes));
 604         if (unlikely(ret != 0)) {
 605                 ret = -EFAULT;
 606                 goto out_err1;
 607         }
 608
 609         if (srf->scanout &&
 610             srf->num_sizes == 1 &&
 611             srf->sizes[0].width == 64 &&
 612             srf->sizes[0].height == 64 &&
 613             srf->format == SVGA3D_A8R8G8B8) {
 614
 615                 /* allocate image area and clear it */
 616                 srf->snooper.image = kzalloc(64 * 64 * 4, GFP_KERNEL);
 617                 if (!srf->snooper.image) {
 618                         DRM_ERROR("Failed to allocate cursor_image\n");
 619                         ret = -ENOMEM;
 620                         goto out_err1;
 621                 }
 622         } else {
 623                 srf->snooper.image = NULL;
 624         }
 625         srf->snooper.crtc = NULL;
 626
 627         user_srf->base.shareable = false;
 628         user_srf->base.tfile = NULL;
 629
 630         /**
 631          * From this point, the generic resource management functions
 632          * destroy the object on failure.
 633          */
 634
 635         ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free);
 636         if (unlikely(ret != 0))
 637                 return ret;
 638
 639         tmp = vmw_resource_reference(&srf->res);
 640         ret = ttm_base_object_init(tfile, &user_srf->base,
 641                                    req->shareable, VMW_RES_SURFACE,
 642                                    &vmw_user_surface_base_release, NULL);
 643
 644         if (unlikely(ret != 0)) {
 645                 vmw_resource_unreference(&tmp);
 646                 vmw_resource_unreference(&res);
 647                 return ret;
 648         }
 649
 650         rep->sid = user_srf->base.hash.key;
 651         if (rep->sid == SVGA3D_INVALID_ID)
 652                 DRM_ERROR("Created bad Surface ID.\n");
 653
 654         vmw_resource_unreference(&res);
 655         return 0;
 656 out_err1:
 657         kfree(srf->sizes);
 658 out_err0:
 659         kfree(user_srf);
 660         return ret;
 661 }
 662
 663 int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
 664                                 struct drm_file *file_priv)
 665 {
 666         union drm_vmw_surface_reference_arg *arg =
 667             (union drm_vmw_surface_reference_arg *)data;
 668         struct drm_vmw_surface_arg *req = &arg->req;
 669         struct drm_vmw_surface_create_req *rep = &arg->rep;
 670         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 671         struct vmw_surface *srf;
 672         struct vmw_user_surface *user_srf;
 673         struct drm_vmw_size __user *user_sizes;
 674         struct ttm_base_object *base;
 675         int ret = -EINVAL;
 676
 677         base = ttm_base_object_lookup(tfile, req->sid);
 678         if (unlikely(base == NULL)) {
 679                 DRM_ERROR("Could not find surface to reference.\n");
 680                 return -EINVAL;
 681         }
 682
 683         if (unlikely(base->object_type != VMW_RES_SURFACE))
 684                 goto out_bad_resource;
 685
 686         user_srf = container_of(base, struct vmw_user_surface, base);
 687         srf = &user_srf->srf;
 688
 689         ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL);
 690         if (unlikely(ret != 0)) {
 691                 DRM_ERROR("Could not add a reference to a surface.\n");
 692                 goto out_no_reference;
 693         }
 694
 695         rep->flags = srf->flags;
 696         rep->format = srf->format;
 697         memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels));
 698         user_sizes = (struct drm_vmw_size __user *)(unsigned long)
 699             rep->size_addr;
 700
 701         if (user_sizes)
 702                 ret = copy_to_user(user_sizes, srf->sizes,
 703                                    srf->num_sizes * sizeof(*srf->sizes));
 704         if (unlikely(ret != 0)) {
 705                 DRM_ERROR("copy_to_user failed %p %u\n",
 706                           user_sizes, srf->num_sizes);
 707                 ret = -EFAULT;
 708         }
 709 out_bad_resource:
 710 out_no_reference:
 711         ttm_base_object_unref(&base);
 712
 713         return ret;
 714 }
 715
 716 int vmw_surface_check(struct vmw_private *dev_priv,
 717                       struct ttm_object_file *tfile,
 718                       uint32_t handle, int *id)
 719 {
 720         struct ttm_base_object *base;
 721         struct vmw_user_surface *user_srf;
 722
 723         int ret = -EPERM;
 724
 725         base = ttm_base_object_lookup(tfile, handle);
 726         if (unlikely(base == NULL))
 727                 return -EINVAL;
 728
 729         if (unlikely(base->object_type != VMW_RES_SURFACE))
 730                 goto out_bad_surface;
 731
 732         user_srf = container_of(base, struct vmw_user_surface, base);
 733         *id = user_srf->srf.res.id;
 734         ret = 0;
 735
 736 out_bad_surface:
 737         /**
 738          * FIXME: May deadlock here when called from the
 739          * command parsing code.
 740          */
 741
 742         ttm_base_object_unref(&base);
 743         return ret;
 744 }
 745
 746 /**
 747  * Buffer management.
 748  */
 749
 750 static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob,
 751                                   unsigned long num_pages)
 752 {
 753         static size_t bo_user_size = ~0;
 754
 755         size_t page_array_size =
 756             (num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
 757
 758         if (unlikely(bo_user_size == ~0)) {
 759                 bo_user_size = glob->ttm_bo_extra_size +
 760                     ttm_round_pot(sizeof(struct vmw_dma_buffer));
 761         }
 762
 763         return bo_user_size + page_array_size;
 764 }
 765
 766 void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
 767 {
 768         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 769         struct ttm_bo_global *glob = bo->glob;
 770
 771         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 772         kfree(vmw_bo);
 773 }
 774
 775 int vmw_dmabuf_init(struct vmw_private *dev_priv,
 776                     struct vmw_dma_buffer *vmw_bo,
 777                     size_t size, struct ttm_placement *placement,
 778                     bool interruptible,
 779                     void (*bo_free) (struct ttm_buffer_object *bo))
 780 {
 781         struct ttm_bo_device *bdev = &dev_priv->bdev;
 782         struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
 783         size_t acc_size;
 784         int ret;
 785
 786         BUG_ON(!bo_free);
 787
 788         acc_size =
 789             vmw_dmabuf_acc_size(bdev->glob,
 790                                 (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
 791
 792         ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
 793         if (unlikely(ret != 0)) {
 794                 /* we must free the bo here as
 795                  * ttm_buffer_object_init does so as well */
 796                 bo_free(&vmw_bo->base);
 797                 return ret;
 798         }
 799
 800         memset(vmw_bo, 0, sizeof(*vmw_bo));
 801
 802         INIT_LIST_HEAD(&vmw_bo->validate_list);
 803
 804         ret = ttm_bo_init(bdev, &vmw_bo->base, size,
 805                           ttm_bo_type_device, placement,
 806                           0, 0, interruptible,
 807                           NULL, acc_size, bo_free);
 808         return ret;
 809 }
 810
 811 static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
 812 {
 813         struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
 814         struct ttm_bo_global *glob = bo->glob;
 815
 816         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 817         kfree(vmw_user_bo);
 818 }
 819
 820 static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
 821 {
 822         struct vmw_user_dma_buffer *vmw_user_bo;
 823         struct ttm_base_object *base = *p_base;
 824         struct ttm_buffer_object *bo;
 825
 826         *p_base = NULL;
 827
 828         if (unlikely(base == NULL))
 829                 return;
 830
 831         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 832         bo = &vmw_user_bo->dma.base;
 833         ttm_bo_unref(&bo);
 834 }
 835
 836 int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
 837                            struct drm_file *file_priv)
 838 {
 839         struct vmw_private *dev_priv = vmw_priv(dev);
 840         union drm_vmw_alloc_dmabuf_arg *arg =
 841             (union drm_vmw_alloc_dmabuf_arg *)data;
 842         struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
 843         struct drm_vmw_dmabuf_rep *rep = &arg->rep;
 844         struct vmw_user_dma_buffer *vmw_user_bo;
 845         struct ttm_buffer_object *tmp;
 846         struct vmw_master *vmaster = vmw_master(file_priv->master);
 847         int ret;
 848
 849         vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
 850         if (unlikely(vmw_user_bo == NULL))
 851                 return -ENOMEM;
 852
 853         ret = ttm_read_lock(&vmaster->lock, true);
 854         if (unlikely(ret != 0)) {
 855                 kfree(vmw_user_bo);
 856                 return ret;
 857         }
 858
 859         ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
 860                               &vmw_vram_sys_placement, true,
 861                               &vmw_user_dmabuf_destroy);
 862         if (unlikely(ret != 0))
 863                 goto out_no_dmabuf;
 864
 865         tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
 866         ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
 867                                    &vmw_user_bo->base,
 868                                    false,
 869                                    ttm_buffer_type,
 870                                    &vmw_user_dmabuf_release, NULL);
 871         if (unlikely(ret != 0))
 872                 goto out_no_base_object;
 873         else {
 874                 rep->handle = vmw_user_bo->base.hash.key;
 875                 rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
 876                 rep->cur_gmr_id = vmw_user_bo->base.hash.key;
 877                 rep->cur_gmr_offset = 0;
 878         }
 879
 880 out_no_base_object:
 881         ttm_bo_unref(&tmp);
 882 out_no_dmabuf:
 883         ttm_read_unlock(&vmaster->lock);
 884
 885         return ret;
 886 }
 887
 888 int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
 889                            struct drm_file *file_priv)
 890 {
 891         struct drm_vmw_unref_dmabuf_arg *arg =
 892             (struct drm_vmw_unref_dmabuf_arg *)data;
 893
 894         return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
 895                                          arg->handle,
 896                                          TTM_REF_USAGE);
 897 }
 898
 899 uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
 900                                   uint32_t cur_validate_node)
 901 {
 902         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 903
 904         if (likely(vmw_bo->on_validate_list))
 905                 return vmw_bo->cur_validate_node;
 906
 907         vmw_bo->cur_validate_node = cur_validate_node;
 908         vmw_bo->on_validate_list = true;
 909
 910         return cur_validate_node;
 911 }
 912
 913 void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
 914 {
 915         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 916
 917         vmw_bo->on_validate_list = false;
 918 }
 919
 920 int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
 921                            uint32_t handle, struct vmw_dma_buffer **out)
 922 {
 923         struct vmw_user_dma_buffer *vmw_user_bo;
 924         struct ttm_base_object *base;
 925
 926         base = ttm_base_object_lookup(tfile, handle);
 927         if (unlikely(base == NULL)) {
 928                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 929                        (unsigned long)handle);
 930                 return -ESRCH;
 931         }
 932
 933         if (unlikely(base->object_type != ttm_buffer_type)) {
 934                 ttm_base_object_unref(&base);
 935                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 936                        (unsigned long)handle);
 937                 return -EINVAL;
 938         }
 939
 940         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 941         (void)ttm_bo_reference(&vmw_user_bo->dma.base);
 942         ttm_base_object_unref(&base);
 943         *out = &vmw_user_bo->dma;
 944
 945         return 0;
 946 }
 947
 948 /*
 949  * Stream management
 950  */
 951
 952 static void vmw_stream_destroy(struct vmw_resource *res)
 953 {
 954         struct vmw_private *dev_priv = res->dev_priv;
 955         struct vmw_stream *stream;
 956         int ret;
 957
 958         DRM_INFO("%s: unref\n", __func__);
 959         stream = container_of(res, struct vmw_stream, res);
 960
 961         ret = vmw_overlay_unref(dev_priv, stream->stream_id);
 962         WARN_ON(ret != 0);
 963 }
 964
 965 static int vmw_stream_init(struct vmw_private *dev_priv,
 966                            struct vmw_stream *stream,
 967                            void (*res_free) (struct vmw_resource *res))
 968 {
 969         struct vmw_resource *res = &stream->res;
 970         int ret;
 971
 972         ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr,
 973                                 VMW_RES_STREAM, res_free);
 974
 975         if (unlikely(ret != 0)) {
 976                 if (res_free == NULL)
 977                         kfree(stream);
 978                 else
 979                         res_free(&stream->res);
 980                 return ret;
 981         }
 982
 983         ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
 984         if (ret) {
 985                 vmw_resource_unreference(&res);
 986                 return ret;
 987         }
 988
 989         DRM_INFO("%s: claimed\n", __func__);
 990
 991         vmw_resource_activate(&stream->res, vmw_stream_destroy);
 992         return 0;
 993 }
 994
 995 /**
 996  * User-space context management:
 997  */
 998
 999 static void vmw_user_stream_free(struct vmw_resource *res)
1000 {
1001         struct vmw_user_stream *stream =
1002             container_of(res, struct vmw_user_stream, stream.res);
1003
1004         kfree(stream);
1005 }
1006
1007 /**
1008  * This function is called when user space has no more references on the
1009  * base object. It releases the base-object's reference on the resource object.
1010  */
1011
1012 static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
1013 {
1014         struct ttm_base_object *base = *p_base;
1015         struct vmw_user_stream *stream =
1016             container_of(base, struct vmw_user_stream, base);
1017         struct vmw_resource *res = &stream->stream.res;
1018
1019         *p_base = NULL;
1020         vmw_resource_unreference(&res);
1021 }
1022
1023 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
1024                            struct drm_file *file_priv)
1025 {
1026         struct vmw_private *dev_priv = vmw_priv(dev);
1027         struct vmw_resource *res;
1028         struct vmw_user_stream *stream;
1029         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1030         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1031         int ret = 0;
1032
1033         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id);
1034         if (unlikely(res == NULL))
1035                 return -EINVAL;
1036
1037         if (res->res_free != &vmw_user_stream_free) {
1038                 ret = -EINVAL;
1039                 goto out;
1040         }
1041
1042         stream = container_of(res, struct vmw_user_stream, stream.res);
1043         if (stream->base.tfile != tfile) {
1044                 ret = -EINVAL;
1045                 goto out;
1046         }
1047
1048         ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
1049 out:
1050         vmw_resource_unreference(&res);
1051         return ret;
1052 }
1053
1054 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
1055                            struct drm_file *file_priv)
1056 {
1057         struct vmw_private *dev_priv = vmw_priv(dev);
1058         struct vmw_user_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL);
1059         struct vmw_resource *res;
1060         struct vmw_resource *tmp;
1061         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1062         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1063         int ret;
1064
1065         if (unlikely(stream == NULL))
1066                 return -ENOMEM;
1067
1068         res = &stream->stream.res;
1069         stream->base.shareable = false;
1070         stream->base.tfile = NULL;
1071
1072         ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
1073         if (unlikely(ret != 0))
1074                 return ret;
1075
1076         tmp = vmw_resource_reference(res);
1077         ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
1078                                    &vmw_user_stream_base_release, NULL);
1079
1080         if (unlikely(ret != 0)) {
1081                 vmw_resource_unreference(&tmp);
1082                 goto out_err;
1083         }
1084
1085         arg->stream_id = res->id;
1086 out_err:
1087         vmw_resource_unreference(&res);
1088         return ret;
1089 }
1090
1091 int vmw_user_stream_lookup(struct vmw_private *dev_priv,
1092                            struct ttm_object_file *tfile,
1093                            uint32_t *inout_id, struct vmw_resource **out)
1094 {
1095         struct vmw_user_stream *stream;
1096         struct vmw_resource *res;
1097         int ret;
1098
1099         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id);
1100         if (unlikely(res == NULL))
1101                 return -EINVAL;
1102
1103         if (res->res_free != &vmw_user_stream_free) {
1104                 ret = -EINVAL;
1105                 goto err_ref;
1106         }
1107
1108         stream = container_of(res, struct vmw_user_stream, stream.res);
1109         if (stream->base.tfile != tfile) {
1110                 ret = -EPERM;
1111                 goto err_ref;
1112         }
1113
1114         *inout_id = stream->stream.stream_id;
1115         *out = res;
1116         return 0;
1117 err_ref:
1118         vmw_resource_unreference(&res);
1119         return ret;
1120 }