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 }
 215
 216 static int vmw_context_init(struct vmw_private *dev_priv,
 217                             struct vmw_resource *res,
 218                             void (*res_free) (struct vmw_resource *res))
 219 {
 220         int ret;
 221
 222         struct {
 223                 SVGA3dCmdHeader header;
 224                 SVGA3dCmdDefineContext body;
 225         } *cmd;
 226
 227         ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
 228                                 VMW_RES_CONTEXT, res_free);
 229
 230         if (unlikely(ret != 0)) {
 231                 if (res_free == NULL)
 232                         kfree(res);
 233                 else
 234                         res_free(res);
 235                 return ret;
 236         }
 237
 238         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 239         if (unlikely(cmd == NULL)) {
 240                 DRM_ERROR("Fifo reserve failed.\n");
 241                 vmw_resource_unreference(&res);
 242                 return -ENOMEM;
 243         }
 244
 245         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 246         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 247         cmd->body.cid = cpu_to_le32(res->id);
 248
 249         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 250         vmw_resource_activate(res, vmw_hw_context_destroy);
 251         return 0;
 252 }
 253
 254 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 255 {
 256         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 257         int ret;
 258
 259         if (unlikely(res == NULL))
 260                 return NULL;
 261
 262         ret = vmw_context_init(dev_priv, res, NULL);
 263         return (ret == 0) ? res : NULL;
 264 }
 265
 266 /**
 267  * User-space context management:
 268  */
 269
 270 static void vmw_user_context_free(struct vmw_resource *res)
 271 {
 272         struct vmw_user_context *ctx =
 273             container_of(res, struct vmw_user_context, res);
 274
 275         kfree(ctx);
 276 }
 277
 278 /**
 279  * This function is called when user space has no more references on the
 280  * base object. It releases the base-object's reference on the resource object.
 281  */
 282
 283 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 284 {
 285         struct ttm_base_object *base = *p_base;
 286         struct vmw_user_context *ctx =
 287             container_of(base, struct vmw_user_context, base);
 288         struct vmw_resource *res = &ctx->res;
 289
 290         *p_base = NULL;
 291         vmw_resource_unreference(&res);
 292 }
 293
 294 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 295                               struct drm_file *file_priv)
 296 {
 297         struct vmw_private *dev_priv = vmw_priv(dev);
 298         struct vmw_resource *res;
 299         struct vmw_user_context *ctx;
 300         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 301         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 302         int ret = 0;
 303
 304         res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
 305         if (unlikely(res == NULL))
 306                 return -EINVAL;
 307
 308         if (res->res_free != &vmw_user_context_free) {
 309                 ret = -EINVAL;
 310                 goto out;
 311         }
 312
 313         ctx = container_of(res, struct vmw_user_context, res);
 314         if (ctx->base.tfile != tfile && !ctx->base.shareable) {
 315                 ret = -EPERM;
 316                 goto out;
 317         }
 318
 319         ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
 320 out:
 321         vmw_resource_unreference(&res);
 322         return ret;
 323 }
 324
 325 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 326                              struct drm_file *file_priv)
 327 {
 328         struct vmw_private *dev_priv = vmw_priv(dev);
 329         struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 330         struct vmw_resource *res;
 331         struct vmw_resource *tmp;
 332         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 333         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 334         int ret;
 335
 336         if (unlikely(ctx == NULL))
 337                 return -ENOMEM;
 338
 339         res = &ctx->res;
 340         ctx->base.shareable = false;
 341         ctx->base.tfile = NULL;
 342
 343         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 344         if (unlikely(ret != 0))
 345                 return ret;
 346
 347         tmp = vmw_resource_reference(&ctx->res);
 348         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 349                                    &vmw_user_context_base_release, NULL);
 350
 351         if (unlikely(ret != 0)) {
 352                 vmw_resource_unreference(&tmp);
 353                 goto out_err;
 354         }
 355
 356         arg->cid = res->id;
 357 out_err:
 358         vmw_resource_unreference(&res);
 359         return ret;
 360
 361 }
 362
 363 int vmw_context_check(struct vmw_private *dev_priv,
 364                       struct ttm_object_file *tfile,
 365                       int id)
 366 {
 367         struct vmw_resource *res;
 368         int ret = 0;
 369
 370         read_lock(&dev_priv->resource_lock);
 371         res = idr_find(&dev_priv->context_idr, id);
 372         if (res && res->avail) {
 373                 struct vmw_user_context *ctx =
 374                         container_of(res, struct vmw_user_context, res);
 375                 if (ctx->base.tfile != tfile && !ctx->base.shareable)
 376                         ret = -EPERM;
 377         } else
 378                 ret = -EINVAL;
 379         read_unlock(&dev_priv->resource_lock);
 380
 381         return ret;
 382 }
 383
 384
 385 /**
 386  * Surface management.
 387  */
 388
 389 static void vmw_hw_surface_destroy(struct vmw_resource *res)
 390 {
 391
 392         struct vmw_private *dev_priv = res->dev_priv;
 393         struct {
 394                 SVGA3dCmdHeader header;
 395                 SVGA3dCmdDestroySurface body;
 396         } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 397
 398         if (unlikely(cmd == NULL)) {
 399                 DRM_ERROR("Failed reserving FIFO space for surface "
 400                           "destruction.\n");
 401                 return;
 402         }
 403
 404         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY);
 405         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 406         cmd->body.sid = cpu_to_le32(res->id);
 407
 408         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 409 }
 410
 411 void vmw_surface_res_free(struct vmw_resource *res)
 412 {
 413         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 414
 415         kfree(srf->sizes);
 416         kfree(srf->snooper.image);
 417         kfree(srf);
 418 }
 419
 420 int vmw_surface_init(struct vmw_private *dev_priv,
 421                      struct vmw_surface *srf,
 422                      void (*res_free) (struct vmw_resource *res))
 423 {
 424         int ret;
 425         struct {
 426                 SVGA3dCmdHeader header;
 427                 SVGA3dCmdDefineSurface body;
 428         } *cmd;
 429         SVGA3dSize *cmd_size;
 430         struct vmw_resource *res = &srf->res;
 431         struct drm_vmw_size *src_size;
 432         size_t submit_size;
 433         uint32_t cmd_len;
 434         int i;
 435
 436         BUG_ON(res_free == NULL);
 437         ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
 438                                 VMW_RES_SURFACE, res_free);
 439
 440         if (unlikely(ret != 0)) {
 441                 res_free(res);
 442                 return ret;
 443         }
 444
 445         submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize);
 446         cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize);
 447
 448         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 449         if (unlikely(cmd == NULL)) {
 450                 DRM_ERROR("Fifo reserve failed for create surface.\n");
 451                 vmw_resource_unreference(&res);
 452                 return -ENOMEM;
 453         }
 454
 455         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE);
 456         cmd->header.size = cpu_to_le32(cmd_len);
 457         cmd->body.sid = cpu_to_le32(res->id);
 458         cmd->body.surfaceFlags = cpu_to_le32(srf->flags);
 459         cmd->body.format = cpu_to_le32(srf->format);
 460         for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {
 461                 cmd->body.face[i].numMipLevels =
 462                     cpu_to_le32(srf->mip_levels[i]);
 463         }
 464
 465         cmd += 1;
 466         cmd_size = (SVGA3dSize *) cmd;
 467         src_size = srf->sizes;
 468
 469         for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) {
 470                 cmd_size->width = cpu_to_le32(src_size->width);
 471                 cmd_size->height = cpu_to_le32(src_size->height);
 472                 cmd_size->depth = cpu_to_le32(src_size->depth);
 473         }
 474
 475         vmw_fifo_commit(dev_priv, submit_size);
 476         vmw_resource_activate(res, vmw_hw_surface_destroy);
 477         return 0;
 478 }
 479
 480 static void vmw_user_surface_free(struct vmw_resource *res)
 481 {
 482         struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
 483         struct vmw_user_surface *user_srf =
 484             container_of(srf, struct vmw_user_surface, srf);
 485
 486         kfree(srf->sizes);
 487         kfree(srf->snooper.image);
 488         kfree(user_srf);
 489 }
 490
 491 int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
 492                                    struct ttm_object_file *tfile,
 493                                    uint32_t handle, struct vmw_surface **out)
 494 {
 495         struct vmw_resource *res;
 496         struct vmw_surface *srf;
 497         struct vmw_user_surface *user_srf;
 498         struct ttm_base_object *base;
 499         int ret = -EINVAL;
 500
 501         base = ttm_base_object_lookup(tfile, handle);
 502         if (unlikely(base == NULL))
 503                 return -EINVAL;
 504
 505         if (unlikely(base->object_type != VMW_RES_SURFACE))
 506                 goto out_bad_resource;
 507
 508         user_srf = container_of(base, struct vmw_user_surface, base);
 509         srf = &user_srf->srf;
 510         res = &srf->res;
 511
 512         read_lock(&dev_priv->resource_lock);
 513
 514         if (!res->avail || res->res_free != &vmw_user_surface_free) {
 515                 read_unlock(&dev_priv->resource_lock);
 516                 goto out_bad_resource;
 517         }
 518
 519         kref_get(&res->kref);
 520         read_unlock(&dev_priv->resource_lock);
 521
 522         *out = srf;
 523         ret = 0;
 524
 525 out_bad_resource:
 526         ttm_base_object_unref(&base);
 527
 528         return ret;
 529 }
 530
 531 static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
 532 {
 533         struct ttm_base_object *base = *p_base;
 534         struct vmw_user_surface *user_srf =
 535             container_of(base, struct vmw_user_surface, base);
 536         struct vmw_resource *res = &user_srf->srf.res;
 537
 538         *p_base = NULL;
 539         vmw_resource_unreference(&res);
 540 }
 541
 542 int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
 543                               struct drm_file *file_priv)
 544 {
 545         struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data;
 546         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 547
 548         return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
 549 }
 550
 551 int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 552                              struct drm_file *file_priv)
 553 {
 554         struct vmw_private *dev_priv = vmw_priv(dev);
 555         struct vmw_user_surface *user_srf =
 556             kmalloc(sizeof(*user_srf), GFP_KERNEL);
 557         struct vmw_surface *srf;
 558         struct vmw_resource *res;
 559         struct vmw_resource *tmp;
 560         union drm_vmw_surface_create_arg *arg =
 561             (union drm_vmw_surface_create_arg *)data;
 562         struct drm_vmw_surface_create_req *req = &arg->req;
 563         struct drm_vmw_surface_arg *rep = &arg->rep;
 564         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 565         struct drm_vmw_size __user *user_sizes;
 566         int ret;
 567         int i;
 568
 569         if (unlikely(user_srf == NULL))
 570                 return -ENOMEM;
 571
 572         srf = &user_srf->srf;
 573         res = &srf->res;
 574
 575         srf->flags = req->flags;
 576         srf->format = req->format;
 577         srf->scanout = req->scanout;
 578         memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels));
 579         srf->num_sizes = 0;
 580         for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i)
 581                 srf->num_sizes += srf->mip_levels[i];
 582
 583         if (srf->num_sizes > DRM_VMW_MAX_SURFACE_FACES *
 584             DRM_VMW_MAX_MIP_LEVELS) {
 585                 ret = -EINVAL;
 586                 goto out_err0;
 587         }
 588
 589         srf->sizes = kmalloc(srf->num_sizes * sizeof(*srf->sizes), GFP_KERNEL);
 590         if (unlikely(srf->sizes == NULL)) {
 591                 ret = -ENOMEM;
 592                 goto out_err0;
 593         }
 594
 595         user_sizes = (struct drm_vmw_size __user *)(unsigned long)
 596             req->size_addr;
 597
 598         ret = copy_from_user(srf->sizes, user_sizes,
 599                              srf->num_sizes * sizeof(*srf->sizes));
 600         if (unlikely(ret != 0))
 601                 goto out_err1;
 602
 603         if (srf->scanout &&
 604             srf->num_sizes == 1 &&
 605             srf->sizes[0].width == 64 &&
 606             srf->sizes[0].height == 64 &&
 607             srf->format == SVGA3D_A8R8G8B8) {
 608
 609                 srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
 610                 /* clear the image */
 611                 if (srf->snooper.image) {
 612                         memset(srf->snooper.image, 0x00, 64 * 64 * 4);
 613                 } else {
 614                         DRM_ERROR("Failed to allocate cursor_image\n");
 615                         ret = -ENOMEM;
 616                         goto out_err1;
 617                 }
 618         } else {
 619                 srf->snooper.image = NULL;
 620         }
 621         srf->snooper.crtc = NULL;
 622
 623         user_srf->base.shareable = false;
 624         user_srf->base.tfile = NULL;
 625
 626         /**
 627          * From this point, the generic resource management functions
 628          * destroy the object on failure.
 629          */
 630
 631         ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free);
 632         if (unlikely(ret != 0))
 633                 return ret;
 634
 635         tmp = vmw_resource_reference(&srf->res);
 636         ret = ttm_base_object_init(tfile, &user_srf->base,
 637                                    req->shareable, VMW_RES_SURFACE,
 638                                    &vmw_user_surface_base_release, NULL);
 639
 640         if (unlikely(ret != 0)) {
 641                 vmw_resource_unreference(&tmp);
 642                 vmw_resource_unreference(&res);
 643                 return ret;
 644         }
 645
 646         rep->sid = user_srf->base.hash.key;
 647         if (rep->sid == SVGA3D_INVALID_ID)
 648                 DRM_ERROR("Created bad Surface ID.\n");
 649
 650         vmw_resource_unreference(&res);
 651         return 0;
 652 out_err1:
 653         kfree(srf->sizes);
 654 out_err0:
 655         kfree(user_srf);
 656         return ret;
 657 }
 658
 659 int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
 660                                 struct drm_file *file_priv)
 661 {
 662         union drm_vmw_surface_reference_arg *arg =
 663             (union drm_vmw_surface_reference_arg *)data;
 664         struct drm_vmw_surface_arg *req = &arg->req;
 665         struct drm_vmw_surface_create_req *rep = &arg->rep;
 666         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 667         struct vmw_surface *srf;
 668         struct vmw_user_surface *user_srf;
 669         struct drm_vmw_size __user *user_sizes;
 670         struct ttm_base_object *base;
 671         int ret = -EINVAL;
 672
 673         base = ttm_base_object_lookup(tfile, req->sid);
 674         if (unlikely(base == NULL)) {
 675                 DRM_ERROR("Could not find surface to reference.\n");
 676                 return -EINVAL;
 677         }
 678
 679         if (unlikely(base->object_type != VMW_RES_SURFACE))
 680                 goto out_bad_resource;
 681
 682         user_srf = container_of(base, struct vmw_user_surface, base);
 683         srf = &user_srf->srf;
 684
 685         ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL);
 686         if (unlikely(ret != 0)) {
 687                 DRM_ERROR("Could not add a reference to a surface.\n");
 688                 goto out_no_reference;
 689         }
 690
 691         rep->flags = srf->flags;
 692         rep->format = srf->format;
 693         memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels));
 694         user_sizes = (struct drm_vmw_size __user *)(unsigned long)
 695             rep->size_addr;
 696
 697         if (user_sizes)
 698                 ret = copy_to_user(user_sizes, srf->sizes,
 699                                    srf->num_sizes * sizeof(*srf->sizes));
 700         if (unlikely(ret != 0))
 701                 DRM_ERROR("copy_to_user failed %p %u\n",
 702                           user_sizes, srf->num_sizes);
 703 out_bad_resource:
 704 out_no_reference:
 705         ttm_base_object_unref(&base);
 706
 707         return ret;
 708 }
 709
 710 int vmw_surface_check(struct vmw_private *dev_priv,
 711                       struct ttm_object_file *tfile,
 712                       uint32_t handle, int *id)
 713 {
 714         struct ttm_base_object *base;
 715         struct vmw_user_surface *user_srf;
 716
 717         int ret = -EPERM;
 718
 719         base = ttm_base_object_lookup(tfile, handle);
 720         if (unlikely(base == NULL))
 721                 return -EINVAL;
 722
 723         if (unlikely(base->object_type != VMW_RES_SURFACE))
 724                 goto out_bad_surface;
 725
 726         user_srf = container_of(base, struct vmw_user_surface, base);
 727         *id = user_srf->srf.res.id;
 728         ret = 0;
 729
 730 out_bad_surface:
 731         /**
 732          * FIXME: May deadlock here when called from the
 733          * command parsing code.
 734          */
 735
 736         ttm_base_object_unref(&base);
 737         return ret;
 738 }
 739
 740 /**
 741  * Buffer management.
 742  */
 743
 744 static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob,
 745                                   unsigned long num_pages)
 746 {
 747         static size_t bo_user_size = ~0;
 748
 749         size_t page_array_size =
 750             (num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
 751
 752         if (unlikely(bo_user_size == ~0)) {
 753                 bo_user_size = glob->ttm_bo_extra_size +
 754                     ttm_round_pot(sizeof(struct vmw_dma_buffer));
 755         }
 756
 757         return bo_user_size + page_array_size;
 758 }
 759
 760 void vmw_dmabuf_gmr_unbind(struct ttm_buffer_object *bo)
 761 {
 762         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 763         struct ttm_bo_global *glob = bo->glob;
 764         struct vmw_private *dev_priv =
 765                 container_of(bo->bdev, struct vmw_private, bdev);
 766
 767         if (vmw_bo->gmr_bound) {
 768                 vmw_gmr_unbind(dev_priv, vmw_bo->gmr_id);
 769                 spin_lock(&glob->lru_lock);
 770                 ida_remove(&dev_priv->gmr_ida, vmw_bo->gmr_id);
 771                 spin_unlock(&glob->lru_lock);
 772                 vmw_bo->gmr_bound = false;
 773         }
 774 }
 775
 776 void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
 777 {
 778         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 779         struct ttm_bo_global *glob = bo->glob;
 780
 781         vmw_dmabuf_gmr_unbind(bo);
 782         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 783         kfree(vmw_bo);
 784 }
 785
 786 int vmw_dmabuf_init(struct vmw_private *dev_priv,
 787                     struct vmw_dma_buffer *vmw_bo,
 788                     size_t size, struct ttm_placement *placement,
 789                     bool interruptible,
 790                     void (*bo_free) (struct ttm_buffer_object *bo))
 791 {
 792         struct ttm_bo_device *bdev = &dev_priv->bdev;
 793         struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
 794         size_t acc_size;
 795         int ret;
 796
 797         BUG_ON(!bo_free);
 798
 799         acc_size =
 800             vmw_dmabuf_acc_size(bdev->glob,
 801                                 (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
 802
 803         ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
 804         if (unlikely(ret != 0)) {
 805                 /* we must free the bo here as
 806                  * ttm_buffer_object_init does so as well */
 807                 bo_free(&vmw_bo->base);
 808                 return ret;
 809         }
 810
 811         memset(vmw_bo, 0, sizeof(*vmw_bo));
 812
 813         INIT_LIST_HEAD(&vmw_bo->gmr_lru);
 814         INIT_LIST_HEAD(&vmw_bo->validate_list);
 815         vmw_bo->gmr_id = 0;
 816         vmw_bo->gmr_bound = false;
 817
 818         ret = ttm_bo_init(bdev, &vmw_bo->base, size,
 819                           ttm_bo_type_device, placement,
 820                           0, 0, interruptible,
 821                           NULL, acc_size, bo_free);
 822         return ret;
 823 }
 824
 825 static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
 826 {
 827         struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
 828         struct ttm_bo_global *glob = bo->glob;
 829
 830         vmw_dmabuf_gmr_unbind(bo);
 831         ttm_mem_global_free(glob->mem_glob, bo->acc_size);
 832         kfree(vmw_user_bo);
 833 }
 834
 835 static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
 836 {
 837         struct vmw_user_dma_buffer *vmw_user_bo;
 838         struct ttm_base_object *base = *p_base;
 839         struct ttm_buffer_object *bo;
 840
 841         *p_base = NULL;
 842
 843         if (unlikely(base == NULL))
 844                 return;
 845
 846         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 847         bo = &vmw_user_bo->dma.base;
 848         ttm_bo_unref(&bo);
 849 }
 850
 851 int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
 852                            struct drm_file *file_priv)
 853 {
 854         struct vmw_private *dev_priv = vmw_priv(dev);
 855         union drm_vmw_alloc_dmabuf_arg *arg =
 856             (union drm_vmw_alloc_dmabuf_arg *)data;
 857         struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
 858         struct drm_vmw_dmabuf_rep *rep = &arg->rep;
 859         struct vmw_user_dma_buffer *vmw_user_bo;
 860         struct ttm_buffer_object *tmp;
 861         struct vmw_master *vmaster = vmw_master(file_priv->master);
 862         int ret;
 863
 864         vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
 865         if (unlikely(vmw_user_bo == NULL))
 866                 return -ENOMEM;
 867
 868         ret = ttm_read_lock(&vmaster->lock, true);
 869         if (unlikely(ret != 0)) {
 870                 kfree(vmw_user_bo);
 871                 return ret;
 872         }
 873
 874         ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
 875                               &vmw_vram_sys_placement, true,
 876                               &vmw_user_dmabuf_destroy);
 877         if (unlikely(ret != 0))
 878                 return ret;
 879
 880         tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
 881         ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
 882                                    &vmw_user_bo->base,
 883                                    false,
 884                                    ttm_buffer_type,
 885                                    &vmw_user_dmabuf_release, NULL);
 886         if (unlikely(ret != 0)) {
 887                 ttm_bo_unref(&tmp);
 888         } else {
 889                 rep->handle = vmw_user_bo->base.hash.key;
 890                 rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
 891                 rep->cur_gmr_id = vmw_user_bo->base.hash.key;
 892                 rep->cur_gmr_offset = 0;
 893         }
 894         ttm_bo_unref(&tmp);
 895
 896         ttm_read_unlock(&vmaster->lock);
 897
 898         return 0;
 899 }
 900
 901 int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
 902                            struct drm_file *file_priv)
 903 {
 904         struct drm_vmw_unref_dmabuf_arg *arg =
 905             (struct drm_vmw_unref_dmabuf_arg *)data;
 906
 907         return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
 908                                          arg->handle,
 909                                          TTM_REF_USAGE);
 910 }
 911
 912 uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
 913                                   uint32_t cur_validate_node)
 914 {
 915         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 916
 917         if (likely(vmw_bo->on_validate_list))
 918                 return vmw_bo->cur_validate_node;
 919
 920         vmw_bo->cur_validate_node = cur_validate_node;
 921         vmw_bo->on_validate_list = true;
 922
 923         return cur_validate_node;
 924 }
 925
 926 void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
 927 {
 928         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 929
 930         vmw_bo->on_validate_list = false;
 931 }
 932
 933 uint32_t vmw_dmabuf_gmr(struct ttm_buffer_object *bo)
 934 {
 935         struct vmw_dma_buffer *vmw_bo;
 936
 937         if (bo->mem.mem_type == TTM_PL_VRAM)
 938                 return SVGA_GMR_FRAMEBUFFER;
 939
 940         vmw_bo = vmw_dma_buffer(bo);
 941
 942         return (vmw_bo->gmr_bound) ? vmw_bo->gmr_id : SVGA_GMR_NULL;
 943 }
 944
 945 void vmw_dmabuf_set_gmr(struct ttm_buffer_object *bo, uint32_t id)
 946 {
 947         struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
 948         vmw_bo->gmr_bound = true;
 949         vmw_bo->gmr_id = id;
 950 }
 951
 952 int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
 953                            uint32_t handle, struct vmw_dma_buffer **out)
 954 {
 955         struct vmw_user_dma_buffer *vmw_user_bo;
 956         struct ttm_base_object *base;
 957
 958         base = ttm_base_object_lookup(tfile, handle);
 959         if (unlikely(base == NULL)) {
 960                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 961                        (unsigned long)handle);
 962                 return -ESRCH;
 963         }
 964
 965         if (unlikely(base->object_type != ttm_buffer_type)) {
 966                 ttm_base_object_unref(&base);
 967                 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
 968                        (unsigned long)handle);
 969                 return -EINVAL;
 970         }
 971
 972         vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
 973         (void)ttm_bo_reference(&vmw_user_bo->dma.base);
 974         ttm_base_object_unref(&base);
 975         *out = &vmw_user_bo->dma;
 976
 977         return 0;
 978 }
 979
 980 /**
 981  * TODO: Implement a gmr id eviction mechanism. Currently we just fail
 982  * when we're out of ids, causing GMR space to be allocated
 983  * out of VRAM.
 984  */
 985
 986 int vmw_gmr_id_alloc(struct vmw_private *dev_priv, uint32_t *p_id)
 987 {
 988         struct ttm_bo_global *glob = dev_priv->bdev.glob;
 989         int id;
 990         int ret;
 991
 992         do {
 993                 if (unlikely(ida_pre_get(&dev_priv->gmr_ida, GFP_KERNEL) == 0))
 994                         return -ENOMEM;
 995
 996                 spin_lock(&glob->lru_lock);
 997                 ret = ida_get_new(&dev_priv->gmr_ida, &id);
 998                 spin_unlock(&glob->lru_lock);
 999         } while (ret == -EAGAIN);
1000
1001         if (unlikely(ret != 0))
1002                 return ret;
1003
1004         if (unlikely(id >= dev_priv->max_gmr_ids)) {
1005                 spin_lock(&glob->lru_lock);
1006                 ida_remove(&dev_priv->gmr_ida, id);
1007                 spin_unlock(&glob->lru_lock);
1008                 return -EBUSY;
1009         }
1010
1011         *p_id = (uint32_t) id;
1012         return 0;
1013 }
1014
1015 /*
1016  * Stream managment
1017  */
1018
1019 static void vmw_stream_destroy(struct vmw_resource *res)
1020 {
1021         struct vmw_private *dev_priv = res->dev_priv;
1022         struct vmw_stream *stream;
1023         int ret;
1024
1025         DRM_INFO("%s: unref\n", __func__);
1026         stream = container_of(res, struct vmw_stream, res);
1027
1028         ret = vmw_overlay_unref(dev_priv, stream->stream_id);
1029         WARN_ON(ret != 0);
1030 }
1031
1032 static int vmw_stream_init(struct vmw_private *dev_priv,
1033                            struct vmw_stream *stream,
1034                            void (*res_free) (struct vmw_resource *res))
1035 {
1036         struct vmw_resource *res = &stream->res;
1037         int ret;
1038
1039         ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr,
1040                                 VMW_RES_STREAM, res_free);
1041
1042         if (unlikely(ret != 0)) {
1043                 if (res_free == NULL)
1044                         kfree(stream);
1045                 else
1046                         res_free(&stream->res);
1047                 return ret;
1048         }
1049
1050         ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
1051         if (ret) {
1052                 vmw_resource_unreference(&res);
1053                 return ret;
1054         }
1055
1056         DRM_INFO("%s: claimed\n", __func__);
1057
1058         vmw_resource_activate(&stream->res, vmw_stream_destroy);
1059         return 0;
1060 }
1061
1062 /**
1063  * User-space context management:
1064  */
1065
1066 static void vmw_user_stream_free(struct vmw_resource *res)
1067 {
1068         struct vmw_user_stream *stream =
1069             container_of(res, struct vmw_user_stream, stream.res);
1070
1071         kfree(stream);
1072 }
1073
1074 /**
1075  * This function is called when user space has no more references on the
1076  * base object. It releases the base-object's reference on the resource object.
1077  */
1078
1079 static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
1080 {
1081         struct ttm_base_object *base = *p_base;
1082         struct vmw_user_stream *stream =
1083             container_of(base, struct vmw_user_stream, base);
1084         struct vmw_resource *res = &stream->stream.res;
1085
1086         *p_base = NULL;
1087         vmw_resource_unreference(&res);
1088 }
1089
1090 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
1091                            struct drm_file *file_priv)
1092 {
1093         struct vmw_private *dev_priv = vmw_priv(dev);
1094         struct vmw_resource *res;
1095         struct vmw_user_stream *stream;
1096         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1097         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1098         int ret = 0;
1099
1100         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id);
1101         if (unlikely(res == NULL))
1102                 return -EINVAL;
1103
1104         if (res->res_free != &vmw_user_stream_free) {
1105                 ret = -EINVAL;
1106                 goto out;
1107         }
1108
1109         stream = container_of(res, struct vmw_user_stream, stream.res);
1110         if (stream->base.tfile != tfile) {
1111                 ret = -EINVAL;
1112                 goto out;
1113         }
1114
1115         ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
1116 out:
1117         vmw_resource_unreference(&res);
1118         return ret;
1119 }
1120
1121 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
1122                            struct drm_file *file_priv)
1123 {
1124         struct vmw_private *dev_priv = vmw_priv(dev);
1125         struct vmw_user_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL);
1126         struct vmw_resource *res;
1127         struct vmw_resource *tmp;
1128         struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1129         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1130         int ret;
1131
1132         if (unlikely(stream == NULL))
1133                 return -ENOMEM;
1134
1135         res = &stream->stream.res;
1136         stream->base.shareable = false;
1137         stream->base.tfile = NULL;
1138
1139         ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
1140         if (unlikely(ret != 0))
1141                 return ret;
1142
1143         tmp = vmw_resource_reference(res);
1144         ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
1145                                    &vmw_user_stream_base_release, NULL);
1146
1147         if (unlikely(ret != 0)) {
1148                 vmw_resource_unreference(&tmp);
1149                 goto out_err;
1150         }
1151
1152         arg->stream_id = res->id;
1153 out_err:
1154         vmw_resource_unreference(&res);
1155         return ret;
1156 }
1157
1158 int vmw_user_stream_lookup(struct vmw_private *dev_priv,
1159                            struct ttm_object_file *tfile,
1160                            uint32_t *inout_id, struct vmw_resource **out)
1161 {
1162         struct vmw_user_stream *stream;
1163         struct vmw_resource *res;
1164         int ret;
1165
1166         res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id);
1167         if (unlikely(res == NULL))
1168                 return -EINVAL;
1169
1170         if (res->res_free != &vmw_user_stream_free) {
1171                 ret = -EINVAL;
1172                 goto err_ref;
1173         }
1174
1175         stream = container_of(res, struct vmw_user_stream, stream.res);
1176         if (stream->base.tfile != tfile) {
1177                 ret = -EPERM;
1178                 goto err_ref;
1179         }
1180
1181         *inout_id = stream->stream.stream_id;
1182         *out = res;
1183         return 0;
1184 err_ref:
1185         vmw_resource_unreference(&res);
1186         return ret;
1187 }