kernel/drivers/gpu/drm/vmwgfx/vmwgfx_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2015 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_resource_priv.h"
  30 #include "vmwgfx_binding.h"
  31 #include "ttm/ttm_placement.h"
  32
  33 struct vmw_user_context {
  34         struct ttm_base_object base;
  35         struct vmw_resource res;
  36         struct vmw_ctx_binding_state *cbs;
  37         struct vmw_cmdbuf_res_manager *man;
  38         struct vmw_resource *cotables[SVGA_COTABLE_DX10_MAX];
  39         spinlock_t cotable_lock;
  40         struct vmw_dma_buffer *dx_query_mob;
  41 };
  42
  43 static void vmw_user_context_free(struct vmw_resource *res);
  44 static struct vmw_resource *
  45 vmw_user_context_base_to_res(struct ttm_base_object *base);
  46
  47 static int vmw_gb_context_create(struct vmw_resource *res);
  48 static int vmw_gb_context_bind(struct vmw_resource *res,
  49                                struct ttm_validate_buffer *val_buf);
  50 static int vmw_gb_context_unbind(struct vmw_resource *res,
  51                                  bool readback,
  52                                  struct ttm_validate_buffer *val_buf);
  53 static int vmw_gb_context_destroy(struct vmw_resource *res);
  54 static int vmw_dx_context_create(struct vmw_resource *res);
  55 static int vmw_dx_context_bind(struct vmw_resource *res,
  56                                struct ttm_validate_buffer *val_buf);
  57 static int vmw_dx_context_unbind(struct vmw_resource *res,
  58                                  bool readback,
  59                                  struct ttm_validate_buffer *val_buf);
  60 static int vmw_dx_context_destroy(struct vmw_resource *res);
  61
  62 static uint64_t vmw_user_context_size;
  63
  64 static const struct vmw_user_resource_conv user_context_conv = {
  65         .object_type = VMW_RES_CONTEXT,
  66         .base_obj_to_res = vmw_user_context_base_to_res,
  67         .res_free = vmw_user_context_free
  68 };
  69
  70 const struct vmw_user_resource_conv *user_context_converter =
  71         &user_context_conv;
  72
  73
  74 static const struct vmw_res_func vmw_legacy_context_func = {
  75         .res_type = vmw_res_context,
  76         .needs_backup = false,
  77         .may_evict = false,
  78         .type_name = "legacy contexts",
  79         .backup_placement = NULL,
  80         .create = NULL,
  81         .destroy = NULL,
  82         .bind = NULL,
  83         .unbind = NULL
  84 };
  85
  86 static const struct vmw_res_func vmw_gb_context_func = {
  87         .res_type = vmw_res_context,
  88         .needs_backup = true,
  89         .may_evict = true,
  90         .type_name = "guest backed contexts",
  91         .backup_placement = &vmw_mob_placement,
  92         .create = vmw_gb_context_create,
  93         .destroy = vmw_gb_context_destroy,
  94         .bind = vmw_gb_context_bind,
  95         .unbind = vmw_gb_context_unbind
  96 };
  97
  98 static const struct vmw_res_func vmw_dx_context_func = {
  99         .res_type = vmw_res_dx_context,
 100         .needs_backup = true,
 101         .may_evict = true,
 102         .type_name = "dx contexts",
 103         .backup_placement = &vmw_mob_placement,
 104         .create = vmw_dx_context_create,
 105         .destroy = vmw_dx_context_destroy,
 106         .bind = vmw_dx_context_bind,
 107         .unbind = vmw_dx_context_unbind
 108 };
 109
 110 /**
 111  * Context management:
 112  */
 113
 114 static void vmw_context_cotables_unref(struct vmw_user_context *uctx)
 115 {
 116         struct vmw_resource *res;
 117         int i;
 118
 119         for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 120                 spin_lock(&uctx->cotable_lock);
 121                 res = uctx->cotables[i];
 122                 uctx->cotables[i] = NULL;
 123                 spin_unlock(&uctx->cotable_lock);
 124
 125                 if (res)
 126                         vmw_resource_unreference(&res);
 127         }
 128 }
 129
 130 static void vmw_hw_context_destroy(struct vmw_resource *res)
 131 {
 132         struct vmw_user_context *uctx =
 133                 container_of(res, struct vmw_user_context, res);
 134         struct vmw_private *dev_priv = res->dev_priv;
 135         struct {
 136                 SVGA3dCmdHeader header;
 137                 SVGA3dCmdDestroyContext body;
 138         } *cmd;
 139
 140
 141         if (res->func->destroy == vmw_gb_context_destroy ||
 142             res->func->destroy == vmw_dx_context_destroy) {
 143                 mutex_lock(&dev_priv->cmdbuf_mutex);
 144                 vmw_cmdbuf_res_man_destroy(uctx->man);
 145                 mutex_lock(&dev_priv->binding_mutex);
 146                 vmw_binding_state_kill(uctx->cbs);
 147                 (void) res->func->destroy(res);
 148                 mutex_unlock(&dev_priv->binding_mutex);
 149                 if (dev_priv->pinned_bo != NULL &&
 150                     !dev_priv->query_cid_valid)
 151                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 152                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 153                 vmw_context_cotables_unref(uctx);
 154                 return;
 155         }
 156
 157         vmw_execbuf_release_pinned_bo(dev_priv);
 158         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 159         if (unlikely(cmd == NULL)) {
 160                 DRM_ERROR("Failed reserving FIFO space for surface "
 161                           "destruction.\n");
 162                 return;
 163         }
 164
 165         cmd->header.id = SVGA_3D_CMD_CONTEXT_DESTROY;
 166         cmd->header.size = sizeof(cmd->body);
 167         cmd->body.cid = res->id;
 168
 169         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 170         vmw_fifo_resource_dec(dev_priv);
 171 }
 172
 173 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 174                                bool dx,
 175                                struct vmw_resource *res,
 176                                void (*res_free)(struct vmw_resource *res))
 177 {
 178         int ret, i;
 179         struct vmw_user_context *uctx =
 180                 container_of(res, struct vmw_user_context, res);
 181
 182         res->backup_size = (dx ? sizeof(SVGADXContextMobFormat) :
 183                             SVGA3D_CONTEXT_DATA_SIZE);
 184         ret = vmw_resource_init(dev_priv, res, true,
 185                                 res_free,
 186                                 dx ? &vmw_dx_context_func :
 187                                 &vmw_gb_context_func);
 188         if (unlikely(ret != 0))
 189                 goto out_err;
 190
 191         if (dev_priv->has_mob) {
 192                 uctx->man = vmw_cmdbuf_res_man_create(dev_priv);
 193                 if (IS_ERR(uctx->man)) {
 194                         ret = PTR_ERR(uctx->man);
 195                         uctx->man = NULL;
 196                         goto out_err;
 197                 }
 198         }
 199
 200         uctx->cbs = vmw_binding_state_alloc(dev_priv);
 201         if (IS_ERR(uctx->cbs)) {
 202                 ret = PTR_ERR(uctx->cbs);
 203                 goto out_err;
 204         }
 205
 206         spin_lock_init(&uctx->cotable_lock);
 207
 208         if (dx) {
 209                 for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 210                         uctx->cotables[i] = vmw_cotable_alloc(dev_priv,
 211                                                               &uctx->res, i);
 212                         if (unlikely(uctx->cotables[i] == NULL)) {
 213                                 ret = -ENOMEM;
 214                                 goto out_cotables;
 215                         }
 216                 }
 217         }
 218
 219
 220
 221         vmw_resource_activate(res, vmw_hw_context_destroy);
 222         return 0;
 223
 224 out_cotables:
 225         vmw_context_cotables_unref(uctx);
 226 out_err:
 227         if (res_free)
 228                 res_free(res);
 229         else
 230                 kfree(res);
 231         return ret;
 232 }
 233
 234 static int vmw_context_init(struct vmw_private *dev_priv,
 235                             struct vmw_resource *res,
 236                             void (*res_free)(struct vmw_resource *res),
 237                             bool dx)
 238 {
 239         int ret;
 240
 241         struct {
 242                 SVGA3dCmdHeader header;
 243                 SVGA3dCmdDefineContext body;
 244         } *cmd;
 245
 246         if (dev_priv->has_mob)
 247                 return vmw_gb_context_init(dev_priv, dx, res, res_free);
 248
 249         ret = vmw_resource_init(dev_priv, res, false,
 250                                 res_free, &vmw_legacy_context_func);
 251
 252         if (unlikely(ret != 0)) {
 253                 DRM_ERROR("Failed to allocate a resource id.\n");
 254                 goto out_early;
 255         }
 256
 257         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 258                 DRM_ERROR("Out of hw context ids.\n");
 259                 vmw_resource_unreference(&res);
 260                 return -ENOMEM;
 261         }
 262
 263         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 264         if (unlikely(cmd == NULL)) {
 265                 DRM_ERROR("Fifo reserve failed.\n");
 266                 vmw_resource_unreference(&res);
 267                 return -ENOMEM;
 268         }
 269
 270         cmd->header.id = SVGA_3D_CMD_CONTEXT_DEFINE;
 271         cmd->header.size = sizeof(cmd->body);
 272         cmd->body.cid = res->id;
 273
 274         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 275         vmw_fifo_resource_inc(dev_priv);
 276         vmw_resource_activate(res, vmw_hw_context_destroy);
 277         return 0;
 278
 279 out_early:
 280         if (res_free == NULL)
 281                 kfree(res);
 282         else
 283                 res_free(res);
 284         return ret;
 285 }
 286
 287
 288 /*
 289  * GB context.
 290  */
 291
 292 static int vmw_gb_context_create(struct vmw_resource *res)
 293 {
 294         struct vmw_private *dev_priv = res->dev_priv;
 295         int ret;
 296         struct {
 297                 SVGA3dCmdHeader header;
 298                 SVGA3dCmdDefineGBContext body;
 299         } *cmd;
 300
 301         if (likely(res->id != -1))
 302                 return 0;
 303
 304         ret = vmw_resource_alloc_id(res);
 305         if (unlikely(ret != 0)) {
 306                 DRM_ERROR("Failed to allocate a context id.\n");
 307                 goto out_no_id;
 308         }
 309
 310         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 311                 ret = -EBUSY;
 312                 goto out_no_fifo;
 313         }
 314
 315         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 316         if (unlikely(cmd == NULL)) {
 317                 DRM_ERROR("Failed reserving FIFO space for context "
 318                           "creation.\n");
 319                 ret = -ENOMEM;
 320                 goto out_no_fifo;
 321         }
 322
 323         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 324         cmd->header.size = sizeof(cmd->body);
 325         cmd->body.cid = res->id;
 326         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 327         vmw_fifo_resource_inc(dev_priv);
 328
 329         return 0;
 330
 331 out_no_fifo:
 332         vmw_resource_release_id(res);
 333 out_no_id:
 334         return ret;
 335 }
 336
 337 static int vmw_gb_context_bind(struct vmw_resource *res,
 338                                struct ttm_validate_buffer *val_buf)
 339 {
 340         struct vmw_private *dev_priv = res->dev_priv;
 341         struct {
 342                 SVGA3dCmdHeader header;
 343                 SVGA3dCmdBindGBContext body;
 344         } *cmd;
 345         struct ttm_buffer_object *bo = val_buf->bo;
 346
 347         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 348
 349         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 350         if (unlikely(cmd == NULL)) {
 351                 DRM_ERROR("Failed reserving FIFO space for context "
 352                           "binding.\n");
 353                 return -ENOMEM;
 354         }
 355         cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 356         cmd->header.size = sizeof(cmd->body);
 357         cmd->body.cid = res->id;
 358         cmd->body.mobid = bo->mem.start;
 359         cmd->body.validContents = res->backup_dirty;
 360         res->backup_dirty = false;
 361         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 362
 363         return 0;
 364 }
 365
 366 static int vmw_gb_context_unbind(struct vmw_resource *res,
 367                                  bool readback,
 368                                  struct ttm_validate_buffer *val_buf)
 369 {
 370         struct vmw_private *dev_priv = res->dev_priv;
 371         struct ttm_buffer_object *bo = val_buf->bo;
 372         struct vmw_fence_obj *fence;
 373         struct vmw_user_context *uctx =
 374                 container_of(res, struct vmw_user_context, res);
 375
 376         struct {
 377                 SVGA3dCmdHeader header;
 378                 SVGA3dCmdReadbackGBContext body;
 379         } *cmd1;
 380         struct {
 381                 SVGA3dCmdHeader header;
 382                 SVGA3dCmdBindGBContext body;
 383         } *cmd2;
 384         uint32_t submit_size;
 385         uint8_t *cmd;
 386
 387
 388         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 389
 390         mutex_lock(&dev_priv->binding_mutex);
 391         vmw_binding_state_scrub(uctx->cbs);
 392
 393         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 394
 395         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 396         if (unlikely(cmd == NULL)) {
 397                 DRM_ERROR("Failed reserving FIFO space for context "
 398                           "unbinding.\n");
 399                 mutex_unlock(&dev_priv->binding_mutex);
 400                 return -ENOMEM;
 401         }
 402
 403         cmd2 = (void *) cmd;
 404         if (readback) {
 405                 cmd1 = (void *) cmd;
 406                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 407                 cmd1->header.size = sizeof(cmd1->body);
 408                 cmd1->body.cid = res->id;
 409                 cmd2 = (void *) (&cmd1[1]);
 410         }
 411         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 412         cmd2->header.size = sizeof(cmd2->body);
 413         cmd2->body.cid = res->id;
 414         cmd2->body.mobid = SVGA3D_INVALID_ID;
 415
 416         vmw_fifo_commit(dev_priv, submit_size);
 417         mutex_unlock(&dev_priv->binding_mutex);
 418
 419         /*
 420          * Create a fence object and fence the backup buffer.
 421          */
 422
 423         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 424                                           &fence, NULL);
 425
 426         vmw_fence_single_bo(bo, fence);
 427
 428         if (likely(fence != NULL))
 429                 vmw_fence_obj_unreference(&fence);
 430
 431         return 0;
 432 }
 433
 434 static int vmw_gb_context_destroy(struct vmw_resource *res)
 435 {
 436         struct vmw_private *dev_priv = res->dev_priv;
 437         struct {
 438                 SVGA3dCmdHeader header;
 439                 SVGA3dCmdDestroyGBContext body;
 440         } *cmd;
 441
 442         if (likely(res->id == -1))
 443                 return 0;
 444
 445         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 446         if (unlikely(cmd == NULL)) {
 447                 DRM_ERROR("Failed reserving FIFO space for context "
 448                           "destruction.\n");
 449                 return -ENOMEM;
 450         }
 451
 452         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 453         cmd->header.size = sizeof(cmd->body);
 454         cmd->body.cid = res->id;
 455         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 456         if (dev_priv->query_cid == res->id)
 457                 dev_priv->query_cid_valid = false;
 458         vmw_resource_release_id(res);
 459         vmw_fifo_resource_dec(dev_priv);
 460
 461         return 0;
 462 }
 463
 464 /*
 465  * DX context.
 466  */
 467
 468 static int vmw_dx_context_create(struct vmw_resource *res)
 469 {
 470         struct vmw_private *dev_priv = res->dev_priv;
 471         int ret;
 472         struct {
 473                 SVGA3dCmdHeader header;
 474                 SVGA3dCmdDXDefineContext body;
 475         } *cmd;
 476
 477         if (likely(res->id != -1))
 478                 return 0;
 479
 480         ret = vmw_resource_alloc_id(res);
 481         if (unlikely(ret != 0)) {
 482                 DRM_ERROR("Failed to allocate a context id.\n");
 483                 goto out_no_id;
 484         }
 485
 486         if (unlikely(res->id >= VMWGFX_NUM_DXCONTEXT)) {
 487                 ret = -EBUSY;
 488                 goto out_no_fifo;
 489         }
 490
 491         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 492         if (unlikely(cmd == NULL)) {
 493                 DRM_ERROR("Failed reserving FIFO space for context "
 494                           "creation.\n");
 495                 ret = -ENOMEM;
 496                 goto out_no_fifo;
 497         }
 498
 499         cmd->header.id = SVGA_3D_CMD_DX_DEFINE_CONTEXT;
 500         cmd->header.size = sizeof(cmd->body);
 501         cmd->body.cid = res->id;
 502         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 503         vmw_fifo_resource_inc(dev_priv);
 504
 505         return 0;
 506
 507 out_no_fifo:
 508         vmw_resource_release_id(res);
 509 out_no_id:
 510         return ret;
 511 }
 512
 513 static int vmw_dx_context_bind(struct vmw_resource *res,
 514                                struct ttm_validate_buffer *val_buf)
 515 {
 516         struct vmw_private *dev_priv = res->dev_priv;
 517         struct {
 518                 SVGA3dCmdHeader header;
 519                 SVGA3dCmdDXBindContext body;
 520         } *cmd;
 521         struct ttm_buffer_object *bo = val_buf->bo;
 522
 523         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 524
 525         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 526         if (unlikely(cmd == NULL)) {
 527                 DRM_ERROR("Failed reserving FIFO space for context "
 528                           "binding.\n");
 529                 return -ENOMEM;
 530         }
 531
 532         cmd->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 533         cmd->header.size = sizeof(cmd->body);
 534         cmd->body.cid = res->id;
 535         cmd->body.mobid = bo->mem.start;
 536         cmd->body.validContents = res->backup_dirty;
 537         res->backup_dirty = false;
 538         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 539
 540
 541         return 0;
 542 }
 543
 544 /**
 545  * vmw_dx_context_scrub_cotables - Scrub all bindings and
 546  * cotables from a context
 547  *
 548  * @ctx: Pointer to the context resource
 549  * @readback: Whether to save the otable contents on scrubbing.
 550  *
 551  * COtables must be unbound before their context, but unbinding requires
 552  * the backup buffer being reserved, whereas scrubbing does not.
 553  * This function scrubs all cotables of a context, potentially reading back
 554  * the contents into their backup buffers. However, scrubbing cotables
 555  * also makes the device context invalid, so scrub all bindings first so
 556  * that doesn't have to be done later with an invalid context.
 557  */
 558 void vmw_dx_context_scrub_cotables(struct vmw_resource *ctx,
 559                                    bool readback)
 560 {
 561         struct vmw_user_context *uctx =
 562                 container_of(ctx, struct vmw_user_context, res);
 563         int i;
 564
 565         vmw_binding_state_scrub(uctx->cbs);
 566         for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 567                 struct vmw_resource *res;
 568
 569                 /* Avoid racing with ongoing cotable destruction. */
 570                 spin_lock(&uctx->cotable_lock);
 571                 res = uctx->cotables[vmw_cotable_scrub_order[i]];
 572                 if (res)
 573                         res = vmw_resource_reference_unless_doomed(res);
 574                 spin_unlock(&uctx->cotable_lock);
 575                 if (!res)
 576                         continue;
 577
 578                 WARN_ON(vmw_cotable_scrub(res, readback));
 579                 vmw_resource_unreference(&res);
 580         }
 581 }
 582
 583 static int vmw_dx_context_unbind(struct vmw_resource *res,
 584                                  bool readback,
 585                                  struct ttm_validate_buffer *val_buf)
 586 {
 587         struct vmw_private *dev_priv = res->dev_priv;
 588         struct ttm_buffer_object *bo = val_buf->bo;
 589         struct vmw_fence_obj *fence;
 590         struct vmw_user_context *uctx =
 591                 container_of(res, struct vmw_user_context, res);
 592
 593         struct {
 594                 SVGA3dCmdHeader header;
 595                 SVGA3dCmdDXReadbackContext body;
 596         } *cmd1;
 597         struct {
 598                 SVGA3dCmdHeader header;
 599                 SVGA3dCmdDXBindContext body;
 600         } *cmd2;
 601         uint32_t submit_size;
 602         uint8_t *cmd;
 603
 604
 605         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 606
 607         mutex_lock(&dev_priv->binding_mutex);
 608         vmw_dx_context_scrub_cotables(res, readback);
 609
 610         if (uctx->dx_query_mob && uctx->dx_query_mob->dx_query_ctx &&
 611             readback) {
 612                 WARN_ON(uctx->dx_query_mob->dx_query_ctx != res);
 613                 if (vmw_query_readback_all(uctx->dx_query_mob))
 614                         DRM_ERROR("Failed to read back query states\n");
 615         }
 616
 617         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 618
 619         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 620         if (unlikely(cmd == NULL)) {
 621                 DRM_ERROR("Failed reserving FIFO space for context "
 622                           "unbinding.\n");
 623                 mutex_unlock(&dev_priv->binding_mutex);
 624                 return -ENOMEM;
 625         }
 626
 627         cmd2 = (void *) cmd;
 628         if (readback) {
 629                 cmd1 = (void *) cmd;
 630                 cmd1->header.id = SVGA_3D_CMD_DX_READBACK_CONTEXT;
 631                 cmd1->header.size = sizeof(cmd1->body);
 632                 cmd1->body.cid = res->id;
 633                 cmd2 = (void *) (&cmd1[1]);
 634         }
 635         cmd2->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 636         cmd2->header.size = sizeof(cmd2->body);
 637         cmd2->body.cid = res->id;
 638         cmd2->body.mobid = SVGA3D_INVALID_ID;
 639
 640         vmw_fifo_commit(dev_priv, submit_size);
 641         mutex_unlock(&dev_priv->binding_mutex);
 642
 643         /*
 644          * Create a fence object and fence the backup buffer.
 645          */
 646
 647         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 648                                           &fence, NULL);
 649
 650         vmw_fence_single_bo(bo, fence);
 651
 652         if (likely(fence != NULL))
 653                 vmw_fence_obj_unreference(&fence);
 654
 655         return 0;
 656 }
 657
 658 static int vmw_dx_context_destroy(struct vmw_resource *res)
 659 {
 660         struct vmw_private *dev_priv = res->dev_priv;
 661         struct {
 662                 SVGA3dCmdHeader header;
 663                 SVGA3dCmdDXDestroyContext body;
 664         } *cmd;
 665
 666         if (likely(res->id == -1))
 667                 return 0;
 668
 669         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 670         if (unlikely(cmd == NULL)) {
 671                 DRM_ERROR("Failed reserving FIFO space for context "
 672                           "destruction.\n");
 673                 return -ENOMEM;
 674         }
 675
 676         cmd->header.id = SVGA_3D_CMD_DX_DESTROY_CONTEXT;
 677         cmd->header.size = sizeof(cmd->body);
 678         cmd->body.cid = res->id;
 679         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 680         if (dev_priv->query_cid == res->id)
 681                 dev_priv->query_cid_valid = false;
 682         vmw_resource_release_id(res);
 683         vmw_fifo_resource_dec(dev_priv);
 684
 685         return 0;
 686 }
 687
 688 /**
 689  * User-space context management:
 690  */
 691
 692 static struct vmw_resource *
 693 vmw_user_context_base_to_res(struct ttm_base_object *base)
 694 {
 695         return &(container_of(base, struct vmw_user_context, base)->res);
 696 }
 697
 698 static void vmw_user_context_free(struct vmw_resource *res)
 699 {
 700         struct vmw_user_context *ctx =
 701             container_of(res, struct vmw_user_context, res);
 702         struct vmw_private *dev_priv = res->dev_priv;
 703
 704         if (ctx->cbs)
 705                 vmw_binding_state_free(ctx->cbs);
 706
 707         (void) vmw_context_bind_dx_query(res, NULL);
 708
 709         ttm_base_object_kfree(ctx, base);
 710         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 711                             vmw_user_context_size);
 712 }
 713
 714 /**
 715  * This function is called when user space has no more references on the
 716  * base object. It releases the base-object's reference on the resource object.
 717  */
 718
 719 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 720 {
 721         struct ttm_base_object *base = *p_base;
 722         struct vmw_user_context *ctx =
 723             container_of(base, struct vmw_user_context, base);
 724         struct vmw_resource *res = &ctx->res;
 725
 726         *p_base = NULL;
 727         vmw_resource_unreference(&res);
 728 }
 729
 730 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 731                               struct drm_file *file_priv)
 732 {
 733         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 734         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 735
 736         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 737 }
 738
 739 static int vmw_context_define(struct drm_device *dev, void *data,
 740                               struct drm_file *file_priv, bool dx)
 741 {
 742         struct vmw_private *dev_priv = vmw_priv(dev);
 743         struct vmw_user_context *ctx;
 744         struct vmw_resource *res;
 745         struct vmw_resource *tmp;
 746         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 747         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 748         int ret;
 749
 750         if (!dev_priv->has_dx && dx) {
 751                 DRM_ERROR("DX contexts not supported by device.\n");
 752                 return -EINVAL;
 753         }
 754
 755         /*
 756          * Approximate idr memory usage with 128 bytes. It will be limited
 757          * by maximum number_of contexts anyway.
 758          */
 759
 760         if (unlikely(vmw_user_context_size == 0))
 761                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128 +
 762                   ((dev_priv->has_mob) ? vmw_cmdbuf_res_man_size() : 0);
 763
 764         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 765         if (unlikely(ret != 0))
 766                 return ret;
 767
 768         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 769                                    vmw_user_context_size,
 770                                    false, true);
 771         if (unlikely(ret != 0)) {
 772                 if (ret != -ERESTARTSYS)
 773                         DRM_ERROR("Out of graphics memory for context"
 774                                   " creation.\n");
 775                 goto out_unlock;
 776         }
 777
 778         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 779         if (unlikely(ctx == NULL)) {
 780                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 781                                     vmw_user_context_size);
 782                 ret = -ENOMEM;
 783                 goto out_unlock;
 784         }
 785
 786         res = &ctx->res;
 787         ctx->base.shareable = false;
 788         ctx->base.tfile = NULL;
 789
 790         /*
 791          * From here on, the destructor takes over resource freeing.
 792          */
 793
 794         ret = vmw_context_init(dev_priv, res, vmw_user_context_free, dx);
 795         if (unlikely(ret != 0))
 796                 goto out_unlock;
 797
 798         tmp = vmw_resource_reference(&ctx->res);
 799         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 800                                    &vmw_user_context_base_release, NULL);
 801
 802         if (unlikely(ret != 0)) {
 803                 vmw_resource_unreference(&tmp);
 804                 goto out_err;
 805         }
 806
 807         arg->cid = ctx->base.hash.key;
 808 out_err:
 809         vmw_resource_unreference(&res);
 810 out_unlock:
 811         ttm_read_unlock(&dev_priv->reservation_sem);
 812         return ret;
 813 }
 814
 815 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 816                              struct drm_file *file_priv)
 817 {
 818         return vmw_context_define(dev, data, file_priv, false);
 819 }
 820
 821 int vmw_extended_context_define_ioctl(struct drm_device *dev, void *data,
 822                                       struct drm_file *file_priv)
 823 {
 824         union drm_vmw_extended_context_arg *arg = (typeof(arg)) data;
 825         struct drm_vmw_context_arg *rep = &arg->rep;
 826
 827         switch (arg->req) {
 828         case drm_vmw_context_legacy:
 829                 return vmw_context_define(dev, rep, file_priv, false);
 830         case drm_vmw_context_dx:
 831                 return vmw_context_define(dev, rep, file_priv, true);
 832         default:
 833                 break;
 834         }
 835         return -EINVAL;
 836 }
 837
 838 /**
 839  * vmw_context_binding_list - Return a list of context bindings
 840  *
 841  * @ctx: The context resource
 842  *
 843  * Returns the current list of bindings of the given context. Note that
 844  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 845  */
 846 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
 847 {
 848         struct vmw_user_context *uctx =
 849                 container_of(ctx, struct vmw_user_context, res);
 850
 851         return vmw_binding_state_list(uctx->cbs);
 852 }
 853
 854 struct vmw_cmdbuf_res_manager *vmw_context_res_man(struct vmw_resource *ctx)
 855 {
 856         return container_of(ctx, struct vmw_user_context, res)->man;
 857 }
 858
 859 struct vmw_resource *vmw_context_cotable(struct vmw_resource *ctx,
 860                                          SVGACOTableType cotable_type)
 861 {
 862         if (cotable_type >= SVGA_COTABLE_DX10_MAX)
 863                 return ERR_PTR(-EINVAL);
 864
 865         return vmw_resource_reference
 866                 (container_of(ctx, struct vmw_user_context, res)->
 867                  cotables[cotable_type]);
 868 }
 869
 870 /**
 871  * vmw_context_binding_state -
 872  * Return a pointer to a context binding state structure
 873  *
 874  * @ctx: The context resource
 875  *
 876  * Returns the current state of bindings of the given context. Note that
 877  * this state becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 878  */
 879 struct vmw_ctx_binding_state *
 880 vmw_context_binding_state(struct vmw_resource *ctx)
 881 {
 882         return container_of(ctx, struct vmw_user_context, res)->cbs;
 883 }
 884
 885 /**
 886  * vmw_context_bind_dx_query -
 887  * Sets query MOB for the context.  If @mob is NULL, then this function will
 888  * remove the association between the MOB and the context.  This function
 889  * assumes the binding_mutex is held.
 890  *
 891  * @ctx_res: The context resource
 892  * @mob: a reference to the query MOB
 893  *
 894  * Returns -EINVAL if a MOB has already been set and does not match the one
 895  * specified in the parameter.  0 otherwise.
 896  */
 897 int vmw_context_bind_dx_query(struct vmw_resource *ctx_res,
 898                               struct vmw_dma_buffer *mob)
 899 {
 900         struct vmw_user_context *uctx =
 901                 container_of(ctx_res, struct vmw_user_context, res);
 902
 903         if (mob == NULL) {
 904                 if (uctx->dx_query_mob) {
 905                         uctx->dx_query_mob->dx_query_ctx = NULL;
 906                         vmw_dmabuf_unreference(&uctx->dx_query_mob);
 907                         uctx->dx_query_mob = NULL;
 908                 }
 909
 910                 return 0;
 911         }
 912
 913         /* Can only have one MOB per context for queries */
 914         if (uctx->dx_query_mob && uctx->dx_query_mob != mob)
 915                 return -EINVAL;
 916
 917         mob->dx_query_ctx  = ctx_res;
 918
 919         if (!uctx->dx_query_mob)
 920                 uctx->dx_query_mob = vmw_dmabuf_reference(mob);
 921
 922         return 0;
 923 }
 924
 925 /**
 926  * vmw_context_get_dx_query_mob - Returns non-counted reference to DX query mob
 927  *
 928  * @ctx_res: The context resource
 929  */
 930 struct vmw_dma_buffer *
 931 vmw_context_get_dx_query_mob(struct vmw_resource *ctx_res)
 932 {
 933         struct vmw_user_context *uctx =
 934                 container_of(ctx_res, struct vmw_user_context, res);
 935
 936         return uctx->dx_query_mob;
 937 }