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   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 /* XXX: This isn't a real hardware flag, but just a hack for kernel to
  39  * know about primary surfaces. Find a better way to accomplish this.
  40  */
  41 #define SVGA3D_SURFACE_HINT_SCANOUT (1 << 9)
  42
  43 struct vmw_user_context {
  44         struct ttm_base_object base;
  45         struct vmw_resource res;
  46 };
  47
  48 struct vmw_user_surface {
  49         struct ttm_base_object base;
  50         struct vmw_surface srf;
  51 };
  52
  53 struct vmw_user_dma_buffer {
  54         struct ttm_base_object base;
  55         struct vmw_dma_buffer dma;
  56 };
  57
  58 struct vmw_bo_user_rep {
  59         uint32_t handle;
  60         uint64_t map_handle;
  61 };
  62
  63 struct vmw_stream {
  64         struct vmw_resource res;
  65         uint32_t stream_id;
  66 };
  67
  68 struct vmw_user_stream {
  69         struct ttm_base_object base;
  70         struct vmw_stream stream;
  71 };
  72
  73 static inline struct vmw_dma_buffer *
  74 vmw_dma_buffer(struct ttm_buffer_object *bo)
  75 {
  76         return container_of(bo, struct vmw_dma_buffer, base);
  77 }
  78
  79 static inline struct vmw_user_dma_buffer *
  80 vmw_user_dma_buffer(struct ttm_buffer_object *bo)
  81 {
  82         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
  83         return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
  84 }
  85
  86 struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
  87 {
  88         kref_get(&res->kref);
  89         return res;
  90 }
  91
  92 static void vmw_resource_release(struct kref *kref)
  93 {
  94         struct vmw_resource *res =
  95             container_of(kref, struct vmw_resource, kref);
  96         struct vmw_private *dev_priv = res->dev_priv;
  97
  98         idr_remove(res->idr, res->id);
  99         write_unlock(&dev_priv->resource_lock);
 100
 101         if (likely(res->hw_destroy != NULL))
 102                 res->hw_destroy(res);
 103
 104         if (res->res_free != NULL)
 105                 res->res_free(res);
 106         else
 107                 kfree(res);
 108
 109         write_lock(&dev_priv->resource_lock);
 110 }
 111
 112 void vmw_resource_unreference(struct vmw_resource **p_res)
 113 {
 114         struct vmw_resource *res = *p_res;
 115         struct vmw_private *dev_priv = res->dev_priv;
 116
 117         *p_res = NULL;
 118         write_lock(&dev_priv->resource_lock);
 119         kref_put(&res->kref, vmw_resource_release);
 120         write_unlock(&dev_priv->resource_lock);
 121 }
 122
 123 static int vmw_resource_init(struct vmw_private *dev_priv,
 124                              struct vmw_resource *res,
 125                              struct idr *idr,
 126                              enum ttm_object_type obj_type,
 127                              void (*res_free) (struct vmw_resource *res))
 128 {
 129         int ret;
 130
 131         kref_init(&res->kref);
 132         res->hw_destroy = NULL;
 133         res->res_free = res_free;
 134         res->res_type = obj_type;
 135         res->idr = idr;
 136         res->avail = false;
 137         res->dev_priv = dev_priv;
 138
 139         do {
 140                 if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
 141                         return -ENOMEM;
 142
 143                 write_lock(&dev_priv->resource_lock);
 144                 ret = idr_get_new_above(idr, res, 1, &res->id);
 145                 write_unlock(&dev_priv->resource_lock);
 146
 147         } while (ret == -EAGAIN);
 148
 149         return ret;
 150 }
 151
 152 /**
 153  * vmw_resource_activate
 154  *
 155  * @res:        Pointer to the newly created resource
 156  * @hw_destroy: Destroy function. NULL if none.
 157  *
 158  * Activate a resource after the hardware has been made aware of it.
 159  * Set tye destroy function to @destroy. Typically this frees the
 160  * resource and destroys the hardware resources associated with it.
 161  * Activate basically means that the function vmw_resource_lookup will
 162  * find it.
 163  */
 164
 165 static void vmw_resource_activate(struct vmw_resource *res,
 166                                   void (*hw_destroy) (struct vmw_resource *))
 167 {
 168         struct vmw_private *dev_priv = res->dev_priv;
 169
 170         write_lock(&dev_priv->resource_lock);
 171         res->avail = true;
 172         res->hw_destroy = hw_destroy;
 173         write_unlock(&dev_priv->resource_lock);
 174 }
 175
 176 struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv,
 177                                          struct idr *idr, int id)
 178 {
 179         struct vmw_resource *res;
 180
 181         read_lock(&dev_priv->resource_lock);
 182         res = idr_find(idr, id);
 183         if (res && res->avail)
 184                 kref_get(&res->kref);
 185         else
 186                 res = NULL;
 187         read_unlock(&dev_priv->resource_lock);
 188
 189         if (unlikely(res == NULL))
 190                 return NULL;
 191
 192         return res;
 193 }
 194
 195 /**
 196  * Context management:
 197  */
 198
 199 static void vmw_hw_context_destroy(struct vmw_resource *res)
 200 {
 201
 202         struct vmw_private *dev_priv = res->dev_priv;
 203         struct {
 204                 SVGA3dCmdHeader header;
 205                 SVGA3dCmdDestroyContext body;
 206         } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 207
 208         if (unlikely(cmd == NULL)) {
 209                 DRM_ERROR("Failed reserving FIFO space for surface "
 210                           "destruction.\n");
 211                 return;
 212         }
 213
 214         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
 215         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 216         cmd->body.cid = cpu_to_le32(res->id);
 217
 218         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 219 }
 220
 221 static int vmw_context_init(struct vmw_private *dev_priv,
 222                             struct vmw_resource *res,
 223                             void (*res_free) (struct vmw_resource *res))
 224 {
 225         int ret;
 226
 227         struct {
 228                 SVGA3dCmdHeader header;
 229                 SVGA3dCmdDefineContext body;
 230         } *cmd;
 231
 232         ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
 233                                 VMW_RES_CONTEXT, res_free);
 234
 235         if (unlikely(ret != 0)) {
 236                 if (res_free == NULL)
 237                         kfree(res);
 238                 else
 239                         res_free(res);
 240                 return ret;
 241         }
 242
 243         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 244         if (unlikely(cmd == NULL)) {
 245                 DRM_ERROR("Fifo reserve failed.\n");
 246                 vmw_resource_unreference(&res);
 247                 return -ENOMEM;
 248         }
 249
 250         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 251         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 252         cmd->body.cid = cpu_to_le32(res->id);
 253
 254         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 255         vmw_resource_activate(res, vmw_hw_context_destroy);
 256         return 0;
 257 }
 258
 259 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 260 {
 261         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 262         int ret;
 263
 264         if (unlikely(res == NULL))
 265                 return NULL;
 266
 267         ret = vmw_context_init(dev_priv, res, NULL);
 268         return (ret == 0) ? res : NULL;
 269 }
 270
 271 /**
 272  * User-space context management:
 273  */
 274
 275 static void vmw_user_context_free(struct vmw_resource *res)
 276 {
 277         struct vmw_user_context *ctx =
 278             container_of(res, struct vmw_user_context, res);
 279
 280         kfree(ctx);
 281 }
 282
 283 /**
 284  * This function is called when user space has no more references on the
 285  * base object. It releases the base-object's reference on the resource object.
 286  */
 287
 288 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 289 {
 290         struct ttm_base_object *base = *p_base;
 291         struct vmw_user_context *ctx =
 292             container_of(base, struct vmw_user_context, base);
 293         struct vmw_resource *res = &ctx->res;
 294
 295         *p_base = NULL;
 296         vmw_resource_unreference(&res);
 297 }
 298
 299 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 300                               struct drm_file *file_priv)
 301 {
 302         struct vmw_private *dev_priv = vmw_priv(dev);
 303         struct vmw_resource *res;
 304         struct vmw_user_context *ctx;
 305         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 306         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 307         int ret = 0;
 308
 309         res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
 310         if (unlikely(res == NULL))
 311                 return -EINVAL;
 312
 313         if (res->res_free != &vmw_user_context_free) {
 314                 ret = -EINVAL;
 315                 goto out;
 316         }
 317
 318         ctx = container_of(res, struct vmw_user_context, res);
 319         if (ctx->base.tfile != tfile && !ctx->base.shareable) {
 320                 ret = -EPERM;
 321                 goto out;
 322         }
 323
 324         ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
 325 out:
 326         vmw_resource_unreference(&res);
 327         return ret;
 328 }
 329
 330 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 331                              struct drm_file *file_priv)
 332 {
 333         struct vmw_private *dev_priv = vmw_priv(dev);
 334         struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 335         struct vmw_resource *res;
 336         struct vmw_resource *tmp;
 337         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 338         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 339         int ret;
 340
 341         if (unlikely(ctx == NULL))
 342                 return -ENOMEM;
 343
 344         res = &ctx->res;
 345         ctx->base.shareable = false;
 346         ctx->base.tfile = NULL;
 347
 348         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 349         if (unlikely(ret != 0))
 350                 return ret;
 351
 352         tmp = vmw_resource_reference(&ctx->res);
 353         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 354                                    &vmw_user_context_base_release, NULL);
 355
 356         if (unlikely(ret != 0)) {
 357                 vmw_resource_unreference(&tmp);
 358                 goto out_err;
 359         }
 360
 361         arg->cid = res->id;
 362 out_err:
 363         vmw_resource_unreference(&res);
 364         return ret;
 365
 366 }
 367
 368 int vmw_context_check(struct vmw_private *dev_priv,
 369                       struct ttm_object_file *tfile,
 370                       int id)
 371 {
 372         struct vmw_resource *res;
 373         int ret = 0;
 374
 375         read_lock(&dev_priv->resource_lock);
 376         res = idr_find(&dev_priv->context_idr, id);
 377         if (res && res->avail) {
 378                 struct vmw_user_context *ctx =
 379                         container_of(res, struct vmw_user_context, res);
 380                 if (ctx->base.tfile != tfile && !ctx->base.shareable)
 381                         ret = -EPERM;
 382         } else
 383                 ret = -EINVAL;
 384         read_unlock(&dev_priv->resource_lock);
 385
 386         return ret;
 387 }
 388
 389
 390 /**
 391  * Surface management.
 392  */
 393
 394 static void vmw_hw_surface_destroy(struct vmw_resource *res)
 395 {
 396
 397         struct vmw_private *dev_priv = res->dev_priv;
 398         struct {
 399                 SVGA3dCmdHeader header;
 400                 SVGA3dCmdDestroySurface body;
 401         } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 402
 403         if (unlikely(cmd == NULL)) {
 404                 DRM_ERROR("Failed reserving FIFO space for surface "
 405                           "destruction.\n");
 406                 return;
 407         }
 408
 409         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY);
 410         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 411         cmd->body.sid = cpu_to_le32(res->id);
 412
 413         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 414 }
 415
 416 void vmw_surface_res_free(struct vmw_resource *res)
 417 {
 418         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 419
 420         kfree(srf->sizes);
 421         kfree(srf->snooper.image);
 422         kfree(srf);
 423 }
 424
 425 int vmw_surface_init(struct vmw_private *dev_priv,
 426                      struct vmw_surface *srf,
 427                      void (*res_free) (struct vmw_resource *res))
 428 {
 429         int ret;
 430         struct {
 431                 SVGA3dCmdHeader header;
 432                 SVGA3dCmdDefineSurface body;
 433         } *cmd;
 434         SVGA3dSize *cmd_size;
 435         struct vmw_resource *res = &srf->res;
 436         struct drm_vmw_size *src_size;
 437         size_t submit_size;
 438         uint32_t cmd_len;
 439         int i;
 440
 441         BUG_ON(res_free == NULL);
 442         ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
 443                                 VMW_RES_SURFACE, res_free);
 444
 445         if (unlikely(ret != 0)) {
 446                 res_free(res);
 447                 return ret;
 448         }
 449
 450         submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize);
 451         cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize);
 452
 453         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 454         if (unlikely(cmd == NULL)) {
 455                 DRM_ERROR("Fifo reserve failed for create surface.\n");
 456                 vmw_resource_unreference(&res);
 457                 return -ENOMEM;
 458         }
 459
 460         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE);
 461         cmd->header.size = cpu_to_le32(cmd_len);
 462         cmd->body.sid = cpu_to_le32(res->id);
 463         cmd->body.surfaceFlags = cpu_to_le32(srf->flags);
 464         cmd->body.format = cpu_to_le32(srf->format);
 465         for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {
 466                 cmd->body.face[i].numMipLevels =
 467                     cpu_to_le32(srf->mip_levels[i]);
 468         }
 469
 470         cmd += 1;
 471         cmd_size = (SVGA3dSize *) cmd;
 472         src_size = srf->sizes;
 473
 474         for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) {
 475                 cmd_size->width = cpu_to_le32(src_size->width);
 476                 cmd_size->height = cpu_to_le32(src_size->height);
 477                 cmd_size->depth = cpu_to_le32(src_size->depth);
 478         }
 479
 480         vmw_fifo_commit(dev_priv, submit_size);
 481         vmw_resource_activate(res, vmw_hw_surface_destroy);
 482         return 0;
 483 }
 484
 485 static void vmw_user_surface_free(struct vmw_resource *res)
 486 {
 487         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 488         struct vmw_user_surface *user_srf =
 489             container_of(srf, struct vmw_user_surface, srf);
 490
 491         kfree(srf->sizes);
 492         kfree(srf->snooper.image);
 493         kfree(user_srf);
 494 }
 495
 496 int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
 497                                    struct ttm_object_file *tfile,
 498                                    uint32_t handle, struct vmw_surface **out)
 499 {
 500         struct vmw_resource *res;
 501         struct vmw_surface *srf;
 502         struct vmw_user_surface *user_srf;
 503         struct ttm_base_object *base;
 504         int ret = -EINVAL;
 505
 506         base = ttm_base_object_lookup(tfile, handle);
 507         if (unlikely(base == NULL))
 508                 return -EINVAL;
 509
 510         if (unlikely(base->object_type != VMW_RES_SURFACE))
 511                 goto out_bad_resource;
 512
 513         user_srf = container_of(base, struct vmw_user_surface, base);
 514         srf = &user_srf->srf;
 515         res = &srf->res;
 516
 517         read_lock(&dev_priv->resource_lock);
 518
 519         if (!res->avail || res->res_free != &vmw_user_surface_free) {
 520                 read_unlock(&dev_priv->resource_lock);
 521                 goto out_bad_resource;
 522         }
 523
 524         kref_get(&res->kref);
 525         read_unlock(&dev_priv->resource_lock);
 526
 527         *out = srf;
 528         ret = 0;
 529
 530 out_bad_resource:
 531         ttm_base_object_unref(&base);
 532
 533         return ret;
 534 }
 535
 536 static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
 537 {
 538         struct ttm_base_object *base = *p_base;
 539         struct vmw_user_surface *user_srf =
 540             container_of(base, struct vmw_user_surface, base);
 541         struct vmw_resource *res = &user_srf->srf.res;
 542
 543         *p_base = NULL;
 544         vmw_resource_unreference(&res);
 545 }
 546
 547 int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
 548                               struct drm_file *file_priv)
 549 {
 550         struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data;
 551         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 552
 553         return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
 554 }
 555
 556 int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 557                              struct drm_file *file_priv)
 558 {
 559         struct vmw_private *dev_priv = vmw_priv(dev);
 560         struct vmw_user_surface *user_srf =
 561             kmalloc(sizeof(*user_srf), GFP_KERNEL);
 562         struct vmw_surface *srf;
 563         struct vmw_resource *res;
 564         struct vmw_resource *tmp;
 565         union drm_vmw_surface_create_arg *arg =
 566             (union drm_vmw_surface_create_arg *)data;
 567         struct drm_vmw_surface_create_req *req = &arg->req;
 568         struct drm_vmw_surface_arg *rep = &arg->rep;
 569         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 570         struct drm_vmw_size __user *user_sizes;
 571         int ret;
 572         int i;
 573
 574         if (unlikely(user_srf == NULL))
 575                 return -ENOMEM;
 576
 577         srf = &user_srf->srf;
 578         res = &srf->res;
 579
 580         srf->flags = req->flags;
 581         srf->format = req->format;
 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                 goto out_err1;
 606
 607         if (srf->flags & SVGA3D_SURFACE_HINT_SCANOUT) {
 608                 /* we should not send this flag down to hardware since
 609                  * its not a official one
 610                  */
 611                 srf->flags &= ~SVGA3D_SURFACE_HINT_SCANOUT;
 612                 srf->scanout = true;
 613         } else {
 614                 srf->scanout = false;
 615         }
 616
 617         if (srf->scanout &&
 618             srf->num_sizes == 1 &&
 619             srf->sizes[0].width == 64 &&
 620             srf->sizes[0].height == 64 &&
 621             srf->format == SVGA3D_A8R8G8B8) {
 622
 623                 srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
 624                 /* clear the image */
 625                 if (srf->snooper.image) {
 626                         memset(srf->snooper.image, 0x00, 64 * 64 * 4);
 627                 } else {
 628                         DRM_ERROR("Failed to allocate cursor_image\n");
 629                         ret = -ENOMEM;
 630                         goto out_err1;
 631                 }
 632         } else {
 633                 srf->snooper.image = NULL;
 634         }
 635         srf->snooper.crtc = NULL;
 636
 637         user_srf->base.shareable = false;
 638         user_srf->base.tfile = NULL;
 639
 640         /**
 641          * From this point, the generic resource management functions
 642          * destroy the object on failure.
 643          */
 644
 645         ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free);
 646         if (unlikely(ret != 0))
 647                 return ret;
 648
 649         tmp = vmw_resource_reference(&srf->res);
 650         ret = ttm_base_object_init(tfile, &user_srf->base,
 651                                    req->shareable, VMW_RES_SURFACE,
 652                                    &vmw_user_surface_base_release, NULL);
 653
 654         if (unlikely(ret != 0)) {
 655                 vmw_resource_unreference(&tmp);
 656                 vmw_resource_unreference(&res);
 657                 return ret;
 658         }
 659
 660         rep->sid = user_srf->base.hash.key;
 661         if (rep->sid == SVGA3D_INVALID_ID)
 662                 DRM_ERROR("Created bad Surface ID.\n");
 663
 664         vmw_resource_unreference(&res);
 665         return 0;
 666 out_err1:
 667         kfree(srf->sizes);
 668 out_err0:
 669         kfree(user_srf);
 670         return ret;
 671 }
 672
 673 int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
 674                                 struct drm_file *file_priv)
 675 {
 676         union drm_vmw_surface_reference_arg *arg =
 677             (union drm_vmw_surface_reference_arg *)data;
 678         struct drm_vmw_surface_arg *req = &arg->req;
 679         struct drm_vmw_surface_create_req *rep = &arg->rep;
 680         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 681         struct vmw_surface *srf;
 682         struct vmw_user_surface *user_srf;
 683         struct drm_vmw_size __user *user_sizes;
 684         struct ttm_base_object *base;
 685         int ret = -EINVAL;
 686
 687         base = ttm_base_object_lookup(tfile, req->sid);
 688         if (unlikely(base == NULL)) {
 689                 DRM_ERROR("Could not find surface to reference.\n");
 690                 return -EINVAL;
 691         }
 692
 693         if (unlikely(base->object_type != VMW_RES_SURFACE))
 694                 goto out_bad_resource;
 695
 696         user_srf = container_of(base, struct vmw_user_surface, base);
 697         srf = &user_srf->srf;
 698
 699         ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL);
 700         if (unlikely(ret != 0)) {
 701                 DRM_ERROR("Could not add a reference to a surface.\n");
 702                 goto out_no_reference;
 703         }
 704
 705         rep->flags = srf->flags;
 706         rep->format = srf->format;
 707         memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels));
 708         user_sizes = (struct drm_vmw_size __user *)(unsigned long)
 709             rep->size_addr;
 710
 711         if (user_sizes)
 712                 ret = copy_to_user(user_sizes, srf->sizes,
 713                                    srf->num_sizes * sizeof(*srf->sizes));
 714         if (unlikely(ret != 0))
 715                 DRM_ERROR("copy_to_user failed %p %u\n",
 716                           user_sizes, srf->num_sizes);
 717 out_bad_resource:
 718 out_no_reference:
 719         ttm_base_object_unref(&base);
 720
 721         return ret;
 722 }
 723
 724 int vmw_surface_check(struct vmw_private *dev_priv,
 725                       struct ttm_object_file *tfile,
 726                       uint32_t handle, int *id)
 727 {
 728         struct ttm_base_object *base;
 729         struct vmw_user_surface *user_srf;
 730
 731         int ret = -EPERM;
 732
 733         base = ttm_base_object_lookup(tfile, handle);
 734         if (unlikely(base == NULL))
 735                 return -EINVAL;
 736
 737         if (unlikely(base->object_type != VMW_RES_SURFACE))
 738                 goto out_bad_surface;
 739
 740         user_srf = container_of(base, struct vmw_user_surface, base);
 741         *id = user_srf->srf.res.id;
 742         ret = 0;
 743
 744 out_bad_surface:
 745         /**
 746          * FIXME: May deadlock here when called from the
 747          * command parsing code.
 748          */
 749
 750         ttm_base_object_unref(&base);
 751         return ret;
 752 }
 753
 754 /**
 755  * Buffer management.
 756  */
 757
 758 static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob,
 759                                   unsigned long num_pages)
 760 {
 761         static size_t bo_user_size = ~0;
 762
 763         size_t page_array_size =
 764             (num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
 765
 766         if (unlikely(bo_user_size == ~0)) {
 767                 bo_user_size = glob->ttm_bo_extra_size +
 768                     ttm_round_pot(sizeof(struct vmw_dma_buffer));
 769         }
 770
 771         return bo_user_size + page_array_size;
 772 }
 773
 774 void vmw_dmabuf_gmr_unbind(struct ttm_buffer_object *bo)
 775 {
 776         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 777         struct ttm_bo_global *glob = bo->glob;
 778         struct vmw_private *dev_priv =
 779                 container_of(bo->bdev, struct vmw_private, bdev);
 780
 781         if (vmw_bo->gmr_bound) {
 782                 vmw_gmr_unbind(dev_priv, vmw_bo->gmr_id);
 783                 spin_lock(&glob->lru_lock);
 784                 ida_remove(&dev_priv->gmr_ida, vmw_bo->gmr_id);
 785                 spin_unlock(&glob->lru_lock);
 786                 vmw_bo->gmr_bound = false;
 787         }
 788 }
 789
 790 void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
 791 {
 792         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 793         struct ttm_bo_global *glob = bo->glob;
 794
 795         vmw_dmabuf_gmr_unbind(bo);
 796         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 797         kfree(vmw_bo);
 798 }
 799
 800 int vmw_dmabuf_init(struct vmw_private *dev_priv,
 801                     struct vmw_dma_buffer *vmw_bo,
 802                     size_t size, struct ttm_placement *placement,
 803                     bool interruptible,
 804                     void (*bo_free) (struct ttm_buffer_object *bo))
 805 {
 806         struct ttm_bo_device *bdev = &dev_priv->bdev;
 807         struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
 808         size_t acc_size;
 809         int ret;
 810
 811         BUG_ON(!bo_free);
 812
 813         acc_size =
 814             vmw_dmabuf_acc_size(bdev->glob,
 815                                 (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
 816
 817         ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
 818         if (unlikely(ret != 0)) {
 819                 /* we must free the bo here as
 820                  * ttm_buffer_object_init does so as well */
 821                 bo_free(&vmw_bo->base);
 822                 return ret;
 823         }
 824
 825         memset(vmw_bo, 0, sizeof(*vmw_bo));
 826
 827         INIT_LIST_HEAD(&vmw_bo->gmr_lru);
 828         INIT_LIST_HEAD(&vmw_bo->validate_list);
 829         vmw_bo->gmr_id = 0;
 830         vmw_bo->gmr_bound = false;
 831
 832         ret = ttm_bo_init(bdev, &vmw_bo->base, size,
 833                           ttm_bo_type_device, placement,
 834                           0, 0, interruptible,
 835                           NULL, acc_size, bo_free);
 836         return ret;
 837 }
 838
 839 static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
 840 {
 841         struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
 842         struct ttm_bo_global *glob = bo->glob;
 843
 844         vmw_dmabuf_gmr_unbind(bo);
 845         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 846         kfree(vmw_user_bo);
 847 }
 848
 849 static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
 850 {
 851         struct vmw_user_dma_buffer *vmw_user_bo;
 852         struct ttm_base_object *base = *p_base;
 853         struct ttm_buffer_object *bo;
 854
 855         *p_base = NULL;
 856
 857         if (unlikely(base == NULL))
 858                 return;
 859
 860         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 861         bo = &vmw_user_bo->dma.base;
 862         ttm_bo_unref(&bo);
 863 }
 864
 865 int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
 866                            struct drm_file *file_priv)
 867 {
 868         struct vmw_private *dev_priv = vmw_priv(dev);
 869         union drm_vmw_alloc_dmabuf_arg *arg =
 870             (union drm_vmw_alloc_dmabuf_arg *)data;
 871         struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
 872         struct drm_vmw_dmabuf_rep *rep = &arg->rep;
 873         struct vmw_user_dma_buffer *vmw_user_bo;
 874         struct ttm_buffer_object *tmp;
 875         struct vmw_master *vmaster = vmw_master(file_priv->master);
 876         int ret;
 877
 878         vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
 879         if (unlikely(vmw_user_bo == NULL))
 880                 return -ENOMEM;
 881
 882         ret = ttm_read_lock(&vmaster->lock, true);
 883         if (unlikely(ret != 0)) {
 884                 kfree(vmw_user_bo);
 885                 return ret;
 886         }
 887
 888         ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
 889                               &vmw_vram_sys_placement, true,
 890                               &vmw_user_dmabuf_destroy);
 891         if (unlikely(ret != 0))
 892                 return ret;
 893
 894         tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
 895         ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
 896                                    &vmw_user_bo->base,
 897                                    false,
 898                                    ttm_buffer_type,
 899                                    &vmw_user_dmabuf_release, NULL);
 900         if (unlikely(ret != 0)) {
 901                 ttm_bo_unref(&tmp);
 902         } else {
 903                 rep->handle = vmw_user_bo->base.hash.key;
 904                 rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
 905                 rep->cur_gmr_id = vmw_user_bo->base.hash.key;
 906                 rep->cur_gmr_offset = 0;
 907         }
 908         ttm_bo_unref(&tmp);
 909
 910         ttm_read_unlock(&vmaster->lock);
 911
 912         return 0;
 913 }
 914
 915 int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
 916                            struct drm_file *file_priv)
 917 {
 918         struct drm_vmw_unref_dmabuf_arg *arg =
 919             (struct drm_vmw_unref_dmabuf_arg *)data;
 920
 921         return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
 922                                          arg->handle,
 923                                          TTM_REF_USAGE);
 924 }
 925
 926 uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
 927                                   uint32_t cur_validate_node)
 928 {
 929         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 930
 931         if (likely(vmw_bo->on_validate_list))
 932                 return vmw_bo->cur_validate_node;
 933
 934         vmw_bo->cur_validate_node = cur_validate_node;
 935         vmw_bo->on_validate_list = true;
 936
 937         return cur_validate_node;
 938 }
 939
 940 void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
 941 {
 942         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 943
 944         vmw_bo->on_validate_list = false;
 945 }
 946
 947 uint32_t vmw_dmabuf_gmr(struct ttm_buffer_object *bo)
 948 {
 949         struct vmw_dma_buffer *vmw_bo;
 950
 951         if (bo->mem.mem_type == TTM_PL_VRAM)
 952                 return SVGA_GMR_FRAMEBUFFER;
 953
 954         vmw_bo = vmw_dma_buffer(bo);
 955
 956         return (vmw_bo->gmr_bound) ? vmw_bo->gmr_id : SVGA_GMR_NULL;
 957 }
 958
 959 void vmw_dmabuf_set_gmr(struct ttm_buffer_object *bo, uint32_t id)
 960 {
 961         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 962         vmw_bo->gmr_bound = true;
 963         vmw_bo->gmr_id = id;
 964 }
 965
 966 int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
 967                            uint32_t handle, struct vmw_dma_buffer **out)
 968 {
 969         struct vmw_user_dma_buffer *vmw_user_bo;
 970         struct ttm_base_object *base;
 971
 972         base = ttm_base_object_lookup(tfile, handle);
 973         if (unlikely(base == NULL)) {
 974                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 975                        (unsigned long)handle);
 976                 return -ESRCH;
 977         }
 978
 979         if (unlikely(base->object_type != ttm_buffer_type)) {
 980                 ttm_base_object_unref(&base);
 981                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 982                        (unsigned long)handle);
 983                 return -EINVAL;
 984         }
 985
 986         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 987         (void)ttm_bo_reference(&vmw_user_bo->dma.base);
 988         ttm_base_object_unref(&base);
 989         *out = &vmw_user_bo->dma;
 990
 991         return 0;
 992 }
 993
 994 /**
 995  * TODO: Implement a gmr id eviction mechanism. Currently we just fail
 996  * when we're out of ids, causing GMR space to be allocated
 997  * out of VRAM.
 998  */
 999
1000 int vmw_gmr_id_alloc(struct vmw_private *dev_priv, uint32_t *p_id)
1001 {
1002         struct ttm_bo_global *glob = dev_priv->bdev.glob;
1003         int id;
1004         int ret;
1005
1006         do {
1007                 if (unlikely(ida_pre_get(&dev_priv->gmr_ida, GFP_KERNEL) == 0))
1008                         return -ENOMEM;
1009
1010                 spin_lock(&glob->lru_lock);
1011                 ret = ida_get_new(&dev_priv->gmr_ida, &id);
1012                 spin_unlock(&glob->lru_lock);
1013         } while (ret == -EAGAIN);
1014
1015         if (unlikely(ret != 0))
1016                 return ret;
1017
1018         if (unlikely(id >= dev_priv->max_gmr_ids)) {
1019                 spin_lock(&glob->lru_lock);
1020                 ida_remove(&dev_priv->gmr_ida, id);
1021                 spin_unlock(&glob->lru_lock);
1022                 return -EBUSY;
1023         }
1024
1025         *p_id = (uint32_t) id;
1026         return 0;
1027 }
1028
1029 /*
1030  * Stream managment
1031  */
1032
1033 static void vmw_stream_destroy(struct vmw_resource *res)
1034 {
1035         struct vmw_private *dev_priv = res->dev_priv;
1036         struct vmw_stream *stream;
1037         int ret;
1038
1039         DRM_INFO("%s: unref\n", __func__);
1040         stream = container_of(res, struct vmw_stream, res);
1041
1042         ret = vmw_overlay_unref(dev_priv, stream->stream_id);
1043         WARN_ON(ret != 0);
1044 }
1045
1046 static int vmw_stream_init(struct vmw_private *dev_priv,
1047                            struct vmw_stream *stream,
1048                            void (*res_free) (struct vmw_resource *res))
1049 {
1050         struct vmw_resource *res = &stream->res;
1051         int ret;
1052
1053         ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr,
1054                                 VMW_RES_STREAM, res_free);
1055
1056         if (unlikely(ret != 0)) {
1057                 if (res_free == NULL)
1058                         kfree(stream);
1059                 else
1060                         res_free(&stream->res);
1061                 return ret;
1062         }
1063
1064         ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
1065         if (ret) {
1066                 vmw_resource_unreference(&res);
1067                 return ret;
1068         }
1069
1070         DRM_INFO("%s: claimed\n", __func__);
1071
1072         vmw_resource_activate(&stream->res, vmw_stream_destroy);
1073         return 0;
1074 }
1075
1076 /**
1077  * User-space context management:
1078  */
1079
1080 static void vmw_user_stream_free(struct vmw_resource *res)
1081 {
1082         struct vmw_user_stream *stream =
1083             container_of(res, struct vmw_user_stream, stream.res);
1084
1085         kfree(stream);
1086 }
1087
1088 /**
1089  * This function is called when user space has no more references on the
1090  * base object. It releases the base-object's reference on the resource object.
1091  */
1092
1093 static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
1094 {
1095         struct ttm_base_object *base = *p_base;
1096         struct vmw_user_stream *stream =
1097             container_of(base, struct vmw_user_stream, base);
1098         struct vmw_resource *res = &stream->stream.res;
1099
1100         *p_base = NULL;
1101         vmw_resource_unreference(&res);
1102 }
1103
1104 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
1105                            struct drm_file *file_priv)
1106 {
1107         struct vmw_private *dev_priv = vmw_priv(dev);
1108         struct vmw_resource *res;
1109         struct vmw_user_stream *stream;
1110         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1111         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1112         int ret = 0;
1113
1114         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id);
1115         if (unlikely(res == NULL))
1116                 return -EINVAL;
1117
1118         if (res->res_free != &vmw_user_stream_free) {
1119                 ret = -EINVAL;
1120                 goto out;
1121         }
1122
1123         stream = container_of(res, struct vmw_user_stream, stream.res);
1124         if (stream->base.tfile != tfile) {
1125                 ret = -EINVAL;
1126                 goto out;
1127         }
1128
1129         ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
1130 out:
1131         vmw_resource_unreference(&res);
1132         return ret;
1133 }
1134
1135 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
1136                            struct drm_file *file_priv)
1137 {
1138         struct vmw_private *dev_priv = vmw_priv(dev);
1139         struct vmw_user_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL);
1140         struct vmw_resource *res;
1141         struct vmw_resource *tmp;
1142         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1143         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1144         int ret;
1145
1146         if (unlikely(stream == NULL))
1147                 return -ENOMEM;
1148
1149         res = &stream->stream.res;
1150         stream->base.shareable = false;
1151         stream->base.tfile = NULL;
1152
1153         ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
1154         if (unlikely(ret != 0))
1155                 return ret;
1156
1157         tmp = vmw_resource_reference(res);
1158         ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
1159                                    &vmw_user_stream_base_release, NULL);
1160
1161         if (unlikely(ret != 0)) {
1162                 vmw_resource_unreference(&tmp);
1163                 goto out_err;
1164         }
1165
1166         arg->stream_id = res->id;
1167 out_err:
1168         vmw_resource_unreference(&res);
1169         return ret;
1170 }
1171
1172 int vmw_user_stream_lookup(struct vmw_private *dev_priv,
1173                            struct ttm_object_file *tfile,
1174                            uint32_t *inout_id, struct vmw_resource **out)
1175 {
1176         struct vmw_user_stream *stream;
1177         struct vmw_resource *res;
1178         int ret;
1179
1180         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id);
1181         if (unlikely(res == NULL))
1182                 return -EINVAL;
1183
1184         if (res->res_free != &vmw_user_stream_free) {
1185                 ret = -EINVAL;
1186                 goto err_ref;
1187         }
1188
1189         stream = container_of(res, struct vmw_user_stream, stream.res);
1190         if (stream->base.tfile != tfile) {
1191                 ret = -EPERM;
1192                 goto err_ref;
1193         }
1194
1195         *inout_id = stream->stream.stream_id;
1196         *out = res;
1197         return 0;
1198 err_ref:
1199         vmw_resource_unreference(&res);
1200         return ret;
1201 }