drivers/gpu/drm/vmwgfx/vmwgfx_context.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
   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 <drm/ttm/ttm_placement.h>
  29
  30 #include "vmwgfx_drv.h"
  31 #include "vmwgfx_resource_priv.h"
  32 #include "vmwgfx_binding.h"
  33
  34 struct vmw_user_context {
  35         struct ttm_base_object base;
  36         struct vmw_resource res;
  37         struct vmw_ctx_binding_state *cbs;
  38         struct vmw_cmdbuf_res_manager *man;
  39         struct vmw_resource *cotables[SVGA_COTABLE_MAX];
  40         spinlock_t cotable_lock;
  41         struct vmw_buffer_object *dx_query_mob;
  42 };
  43
  44 static void vmw_user_context_free(struct vmw_resource *res);
  45 static struct vmw_resource *
  46 vmw_user_context_base_to_res(struct ttm_base_object *base);
  47
  48 static int vmw_gb_context_create(struct vmw_resource *res);
  49 static int vmw_gb_context_bind(struct vmw_resource *res,
  50                                struct ttm_validate_buffer *val_buf);
  51 static int vmw_gb_context_unbind(struct vmw_resource *res,
  52                                  bool readback,
  53                                  struct ttm_validate_buffer *val_buf);
  54 static int vmw_gb_context_destroy(struct vmw_resource *res);
  55 static int vmw_dx_context_create(struct vmw_resource *res);
  56 static int vmw_dx_context_bind(struct vmw_resource *res,
  57                                struct ttm_validate_buffer *val_buf);
  58 static int vmw_dx_context_unbind(struct vmw_resource *res,
  59                                  bool readback,
  60                                  struct ttm_validate_buffer *val_buf);
  61 static int vmw_dx_context_destroy(struct vmw_resource *res);
  62
  63 static uint64_t vmw_user_context_size;
  64
  65 static const struct vmw_user_resource_conv user_context_conv = {
  66         .object_type = VMW_RES_CONTEXT,
  67         .base_obj_to_res = vmw_user_context_base_to_res,
  68         .res_free = vmw_user_context_free
  69 };
  70
  71 const struct vmw_user_resource_conv *user_context_converter =
  72         &user_context_conv;
  73
  74
  75 static const struct vmw_res_func vmw_legacy_context_func = {
  76         .res_type = vmw_res_context,
  77         .needs_backup = false,
  78         .may_evict = false,
  79         .type_name = "legacy contexts",
  80         .backup_placement = NULL,
  81         .create = NULL,
  82         .destroy = NULL,
  83         .bind = NULL,
  84         .unbind = NULL
  85 };
  86
  87 static const struct vmw_res_func vmw_gb_context_func = {
  88         .res_type = vmw_res_context,
  89         .needs_backup = true,
  90         .may_evict = true,
  91         .prio = 3,
  92         .dirty_prio = 3,
  93         .type_name = "guest backed contexts",
  94         .backup_placement = &vmw_mob_placement,
  95         .create = vmw_gb_context_create,
  96         .destroy = vmw_gb_context_destroy,
  97         .bind = vmw_gb_context_bind,
  98         .unbind = vmw_gb_context_unbind
  99 };
 100
 101 static const struct vmw_res_func vmw_dx_context_func = {
 102         .res_type = vmw_res_dx_context,
 103         .needs_backup = true,
 104         .may_evict = true,
 105         .prio = 3,
 106         .dirty_prio = 3,
 107         .type_name = "dx contexts",
 108         .backup_placement = &vmw_mob_placement,
 109         .create = vmw_dx_context_create,
 110         .destroy = vmw_dx_context_destroy,
 111         .bind = vmw_dx_context_bind,
 112         .unbind = vmw_dx_context_unbind
 113 };
 114
 115 /*
 116  * Context management:
 117  */
 118
 119 static void vmw_context_cotables_unref(struct vmw_private *dev_priv,
 120                                        struct vmw_user_context *uctx)
 121 {
 122         struct vmw_resource *res;
 123         int i;
 124         u32 cotable_max = has_sm5_context(dev_priv) ?
 125                 SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
 126
 127         for (i = 0; i < cotable_max; ++i) {
 128                 spin_lock(&uctx->cotable_lock);
 129                 res = uctx->cotables[i];
 130                 uctx->cotables[i] = NULL;
 131                 spin_unlock(&uctx->cotable_lock);
 132
 133                 if (res)
 134                         vmw_resource_unreference(&res);
 135         }
 136 }
 137
 138 static void vmw_hw_context_destroy(struct vmw_resource *res)
 139 {
 140         struct vmw_user_context *uctx =
 141                 container_of(res, struct vmw_user_context, res);
 142         struct vmw_private *dev_priv = res->dev_priv;
 143         struct {
 144                 SVGA3dCmdHeader header;
 145                 SVGA3dCmdDestroyContext body;
 146         } *cmd;
 147
 148
 149         if (res->func->destroy == vmw_gb_context_destroy ||
 150             res->func->destroy == vmw_dx_context_destroy) {
 151                 mutex_lock(&dev_priv->cmdbuf_mutex);
 152                 vmw_cmdbuf_res_man_destroy(uctx->man);
 153                 mutex_lock(&dev_priv->binding_mutex);
 154                 vmw_binding_state_kill(uctx->cbs);
 155                 (void) res->func->destroy(res);
 156                 mutex_unlock(&dev_priv->binding_mutex);
 157                 if (dev_priv->pinned_bo != NULL &&
 158                     !dev_priv->query_cid_valid)
 159                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 160                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 161                 vmw_context_cotables_unref(dev_priv, uctx);
 162                 return;
 163         }
 164
 165         vmw_execbuf_release_pinned_bo(dev_priv);
 166         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 167         if (unlikely(cmd == NULL))
 168                 return;
 169
 170         cmd->header.id = SVGA_3D_CMD_CONTEXT_DESTROY;
 171         cmd->header.size = sizeof(cmd->body);
 172         cmd->body.cid = res->id;
 173
 174         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 175         vmw_fifo_resource_dec(dev_priv);
 176 }
 177
 178 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 179                                bool dx,
 180                                struct vmw_resource *res,
 181                                void (*res_free)(struct vmw_resource *res))
 182 {
 183         int ret, i;
 184         struct vmw_user_context *uctx =
 185                 container_of(res, struct vmw_user_context, res);
 186
 187         res->backup_size = (dx ? sizeof(SVGADXContextMobFormat) :
 188                             SVGA3D_CONTEXT_DATA_SIZE);
 189         ret = vmw_resource_init(dev_priv, res, true,
 190                                 res_free,
 191                                 dx ? &vmw_dx_context_func :
 192                                 &vmw_gb_context_func);
 193         if (unlikely(ret != 0))
 194                 goto out_err;
 195
 196         if (dev_priv->has_mob) {
 197                 uctx->man = vmw_cmdbuf_res_man_create(dev_priv);
 198                 if (IS_ERR(uctx->man)) {
 199                         ret = PTR_ERR(uctx->man);
 200                         uctx->man = NULL;
 201                         goto out_err;
 202                 }
 203         }
 204
 205         uctx->cbs = vmw_binding_state_alloc(dev_priv);
 206         if (IS_ERR(uctx->cbs)) {
 207                 ret = PTR_ERR(uctx->cbs);
 208                 goto out_err;
 209         }
 210
 211         spin_lock_init(&uctx->cotable_lock);
 212
 213         if (dx) {
 214                 u32 cotable_max = has_sm5_context(dev_priv) ?
 215                         SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
 216                 for (i = 0; i < cotable_max; ++i) {
 217                         uctx->cotables[i] = vmw_cotable_alloc(dev_priv,
 218                                                               &uctx->res, i);
 219                         if (IS_ERR(uctx->cotables[i])) {
 220                                 ret = PTR_ERR(uctx->cotables[i]);
 221                                 goto out_cotables;
 222                         }
 223                 }
 224         }
 225
 226         res->hw_destroy = vmw_hw_context_destroy;
 227         return 0;
 228
 229 out_cotables:
 230         vmw_context_cotables_unref(dev_priv, uctx);
 231 out_err:
 232         if (res_free)
 233                 res_free(res);
 234         else
 235                 kfree(res);
 236         return ret;
 237 }
 238
 239 static int vmw_context_init(struct vmw_private *dev_priv,
 240                             struct vmw_resource *res,
 241                             void (*res_free)(struct vmw_resource *res),
 242                             bool dx)
 243 {
 244         int ret;
 245
 246         struct {
 247                 SVGA3dCmdHeader header;
 248                 SVGA3dCmdDefineContext body;
 249         } *cmd;
 250
 251         if (dev_priv->has_mob)
 252                 return vmw_gb_context_init(dev_priv, dx, res, res_free);
 253
 254         ret = vmw_resource_init(dev_priv, res, false,
 255                                 res_free, &vmw_legacy_context_func);
 256
 257         if (unlikely(ret != 0)) {
 258                 DRM_ERROR("Failed to allocate a resource id.\n");
 259                 goto out_early;
 260         }
 261
 262         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 263                 DRM_ERROR("Out of hw context ids.\n");
 264                 vmw_resource_unreference(&res);
 265                 return -ENOMEM;
 266         }
 267
 268         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 269         if (unlikely(cmd == NULL)) {
 270                 vmw_resource_unreference(&res);
 271                 return -ENOMEM;
 272         }
 273
 274         cmd->header.id = SVGA_3D_CMD_CONTEXT_DEFINE;
 275         cmd->header.size = sizeof(cmd->body);
 276         cmd->body.cid = res->id;
 277
 278         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 279         vmw_fifo_resource_inc(dev_priv);
 280         res->hw_destroy = vmw_hw_context_destroy;
 281         return 0;
 282
 283 out_early:
 284         if (res_free == NULL)
 285                 kfree(res);
 286         else
 287                 res_free(res);
 288         return ret;
 289 }
 290
 291
 292 /*
 293  * GB context.
 294  */
 295
 296 static int vmw_gb_context_create(struct vmw_resource *res)
 297 {
 298         struct vmw_private *dev_priv = res->dev_priv;
 299         int ret;
 300         struct {
 301                 SVGA3dCmdHeader header;
 302                 SVGA3dCmdDefineGBContext body;
 303         } *cmd;
 304
 305         if (likely(res->id != -1))
 306                 return 0;
 307
 308         ret = vmw_resource_alloc_id(res);
 309         if (unlikely(ret != 0)) {
 310                 DRM_ERROR("Failed to allocate a context id.\n");
 311                 goto out_no_id;
 312         }
 313
 314         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 315                 ret = -EBUSY;
 316                 goto out_no_fifo;
 317         }
 318
 319         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 320         if (unlikely(cmd == NULL)) {
 321                 ret = -ENOMEM;
 322                 goto out_no_fifo;
 323         }
 324
 325         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 326         cmd->header.size = sizeof(cmd->body);
 327         cmd->body.cid = res->id;
 328         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 329         vmw_fifo_resource_inc(dev_priv);
 330
 331         return 0;
 332
 333 out_no_fifo:
 334         vmw_resource_release_id(res);
 335 out_no_id:
 336         return ret;
 337 }
 338
 339 static int vmw_gb_context_bind(struct vmw_resource *res,
 340                                struct ttm_validate_buffer *val_buf)
 341 {
 342         struct vmw_private *dev_priv = res->dev_priv;
 343         struct {
 344                 SVGA3dCmdHeader header;
 345                 SVGA3dCmdBindGBContext body;
 346         } *cmd;
 347         struct ttm_buffer_object *bo = val_buf->bo;
 348
 349         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 350
 351         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 352         if (unlikely(cmd == NULL))
 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_cmd_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_CMD_RESERVE(dev_priv, submit_size);
 396         if (unlikely(cmd == NULL)) {
 397                 mutex_unlock(&dev_priv->binding_mutex);
 398                 return -ENOMEM;
 399         }
 400
 401         cmd2 = (void *) cmd;
 402         if (readback) {
 403                 cmd1 = (void *) cmd;
 404                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 405                 cmd1->header.size = sizeof(cmd1->body);
 406                 cmd1->body.cid = res->id;
 407                 cmd2 = (void *) (&cmd1[1]);
 408         }
 409         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 410         cmd2->header.size = sizeof(cmd2->body);
 411         cmd2->body.cid = res->id;
 412         cmd2->body.mobid = SVGA3D_INVALID_ID;
 413
 414         vmw_cmd_commit(dev_priv, submit_size);
 415         mutex_unlock(&dev_priv->binding_mutex);
 416
 417         /*
 418          * Create a fence object and fence the backup buffer.
 419          */
 420
 421         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 422                                           &fence, NULL);
 423
 424         vmw_bo_fence_single(bo, fence);
 425
 426         if (likely(fence != NULL))
 427                 vmw_fence_obj_unreference(&fence);
 428
 429         return 0;
 430 }
 431
 432 static int vmw_gb_context_destroy(struct vmw_resource *res)
 433 {
 434         struct vmw_private *dev_priv = res->dev_priv;
 435         struct {
 436                 SVGA3dCmdHeader header;
 437                 SVGA3dCmdDestroyGBContext body;
 438         } *cmd;
 439
 440         if (likely(res->id == -1))
 441                 return 0;
 442
 443         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 444         if (unlikely(cmd == NULL))
 445                 return -ENOMEM;
 446
 447         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 448         cmd->header.size = sizeof(cmd->body);
 449         cmd->body.cid = res->id;
 450         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 451         if (dev_priv->query_cid == res->id)
 452                 dev_priv->query_cid_valid = false;
 453         vmw_resource_release_id(res);
 454         vmw_fifo_resource_dec(dev_priv);
 455
 456         return 0;
 457 }
 458
 459 /*
 460  * DX context.
 461  */
 462
 463 static int vmw_dx_context_create(struct vmw_resource *res)
 464 {
 465         struct vmw_private *dev_priv = res->dev_priv;
 466         int ret;
 467         struct {
 468                 SVGA3dCmdHeader header;
 469                 SVGA3dCmdDXDefineContext body;
 470         } *cmd;
 471
 472         if (likely(res->id != -1))
 473                 return 0;
 474
 475         ret = vmw_resource_alloc_id(res);
 476         if (unlikely(ret != 0)) {
 477                 DRM_ERROR("Failed to allocate a context id.\n");
 478                 goto out_no_id;
 479         }
 480
 481         if (unlikely(res->id >= VMWGFX_NUM_DXCONTEXT)) {
 482                 ret = -EBUSY;
 483                 goto out_no_fifo;
 484         }
 485
 486         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 487         if (unlikely(cmd == NULL)) {
 488                 ret = -ENOMEM;
 489                 goto out_no_fifo;
 490         }
 491
 492         cmd->header.id = SVGA_3D_CMD_DX_DEFINE_CONTEXT;
 493         cmd->header.size = sizeof(cmd->body);
 494         cmd->body.cid = res->id;
 495         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 496         vmw_fifo_resource_inc(dev_priv);
 497
 498         return 0;
 499
 500 out_no_fifo:
 501         vmw_resource_release_id(res);
 502 out_no_id:
 503         return ret;
 504 }
 505
 506 static int vmw_dx_context_bind(struct vmw_resource *res,
 507                                struct ttm_validate_buffer *val_buf)
 508 {
 509         struct vmw_private *dev_priv = res->dev_priv;
 510         struct {
 511                 SVGA3dCmdHeader header;
 512                 SVGA3dCmdDXBindContext body;
 513         } *cmd;
 514         struct ttm_buffer_object *bo = val_buf->bo;
 515
 516         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 517
 518         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 519         if (unlikely(cmd == NULL))
 520                 return -ENOMEM;
 521
 522         cmd->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 523         cmd->header.size = sizeof(cmd->body);
 524         cmd->body.cid = res->id;
 525         cmd->body.mobid = bo->mem.start;
 526         cmd->body.validContents = res->backup_dirty;
 527         res->backup_dirty = false;
 528         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 529
 530
 531         return 0;
 532 }
 533
 534 /**
 535  * vmw_dx_context_scrub_cotables - Scrub all bindings and
 536  * cotables from a context
 537  *
 538  * @ctx: Pointer to the context resource
 539  * @readback: Whether to save the otable contents on scrubbing.
 540  *
 541  * COtables must be unbound before their context, but unbinding requires
 542  * the backup buffer being reserved, whereas scrubbing does not.
 543  * This function scrubs all cotables of a context, potentially reading back
 544  * the contents into their backup buffers. However, scrubbing cotables
 545  * also makes the device context invalid, so scrub all bindings first so
 546  * that doesn't have to be done later with an invalid context.
 547  */
 548 void vmw_dx_context_scrub_cotables(struct vmw_resource *ctx,
 549                                    bool readback)
 550 {
 551         struct vmw_user_context *uctx =
 552                 container_of(ctx, struct vmw_user_context, res);
 553         u32 cotable_max = has_sm5_context(ctx->dev_priv) ?
 554                 SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
 555         int i;
 556
 557         vmw_binding_state_scrub(uctx->cbs);
 558         for (i = 0; i < cotable_max; ++i) {
 559                 struct vmw_resource *res;
 560
 561                 /* Avoid racing with ongoing cotable destruction. */
 562                 spin_lock(&uctx->cotable_lock);
 563                 res = uctx->cotables[vmw_cotable_scrub_order[i]];
 564                 if (res)
 565                         res = vmw_resource_reference_unless_doomed(res);
 566                 spin_unlock(&uctx->cotable_lock);
 567                 if (!res)
 568                         continue;
 569
 570                 WARN_ON(vmw_cotable_scrub(res, readback));
 571                 vmw_resource_unreference(&res);
 572         }
 573 }
 574
 575 static int vmw_dx_context_unbind(struct vmw_resource *res,
 576                                  bool readback,
 577                                  struct ttm_validate_buffer *val_buf)
 578 {
 579         struct vmw_private *dev_priv = res->dev_priv;
 580         struct ttm_buffer_object *bo = val_buf->bo;
 581         struct vmw_fence_obj *fence;
 582         struct vmw_user_context *uctx =
 583                 container_of(res, struct vmw_user_context, res);
 584
 585         struct {
 586                 SVGA3dCmdHeader header;
 587                 SVGA3dCmdDXReadbackContext body;
 588         } *cmd1;
 589         struct {
 590                 SVGA3dCmdHeader header;
 591                 SVGA3dCmdDXBindContext body;
 592         } *cmd2;
 593         uint32_t submit_size;
 594         uint8_t *cmd;
 595
 596
 597         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 598
 599         mutex_lock(&dev_priv->binding_mutex);
 600         vmw_dx_context_scrub_cotables(res, readback);
 601
 602         if (uctx->dx_query_mob && uctx->dx_query_mob->dx_query_ctx &&
 603             readback) {
 604                 WARN_ON(uctx->dx_query_mob->dx_query_ctx != res);
 605                 if (vmw_query_readback_all(uctx->dx_query_mob))
 606                         DRM_ERROR("Failed to read back query states\n");
 607         }
 608
 609         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 610
 611         cmd = VMW_CMD_RESERVE(dev_priv, submit_size);
 612         if (unlikely(cmd == NULL)) {
 613                 mutex_unlock(&dev_priv->binding_mutex);
 614                 return -ENOMEM;
 615         }
 616
 617         cmd2 = (void *) cmd;
 618         if (readback) {
 619                 cmd1 = (void *) cmd;
 620                 cmd1->header.id = SVGA_3D_CMD_DX_READBACK_CONTEXT;
 621                 cmd1->header.size = sizeof(cmd1->body);
 622                 cmd1->body.cid = res->id;
 623                 cmd2 = (void *) (&cmd1[1]);
 624         }
 625         cmd2->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 626         cmd2->header.size = sizeof(cmd2->body);
 627         cmd2->body.cid = res->id;
 628         cmd2->body.mobid = SVGA3D_INVALID_ID;
 629
 630         vmw_cmd_commit(dev_priv, submit_size);
 631         mutex_unlock(&dev_priv->binding_mutex);
 632
 633         /*
 634          * Create a fence object and fence the backup buffer.
 635          */
 636
 637         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 638                                           &fence, NULL);
 639
 640         vmw_bo_fence_single(bo, fence);
 641
 642         if (likely(fence != NULL))
 643                 vmw_fence_obj_unreference(&fence);
 644
 645         return 0;
 646 }
 647
 648 static int vmw_dx_context_destroy(struct vmw_resource *res)
 649 {
 650         struct vmw_private *dev_priv = res->dev_priv;
 651         struct {
 652                 SVGA3dCmdHeader header;
 653                 SVGA3dCmdDXDestroyContext body;
 654         } *cmd;
 655
 656         if (likely(res->id == -1))
 657                 return 0;
 658
 659         cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
 660         if (unlikely(cmd == NULL))
 661                 return -ENOMEM;
 662
 663         cmd->header.id = SVGA_3D_CMD_DX_DESTROY_CONTEXT;
 664         cmd->header.size = sizeof(cmd->body);
 665         cmd->body.cid = res->id;
 666         vmw_cmd_commit(dev_priv, sizeof(*cmd));
 667         if (dev_priv->query_cid == res->id)
 668                 dev_priv->query_cid_valid = false;
 669         vmw_resource_release_id(res);
 670         vmw_fifo_resource_dec(dev_priv);
 671
 672         return 0;
 673 }
 674
 675 /*
 676  * User-space context management:
 677  */
 678
 679 static struct vmw_resource *
 680 vmw_user_context_base_to_res(struct ttm_base_object *base)
 681 {
 682         return &(container_of(base, struct vmw_user_context, base)->res);
 683 }
 684
 685 static void vmw_user_context_free(struct vmw_resource *res)
 686 {
 687         struct vmw_user_context *ctx =
 688             container_of(res, struct vmw_user_context, res);
 689         struct vmw_private *dev_priv = res->dev_priv;
 690
 691         if (ctx->cbs)
 692                 vmw_binding_state_free(ctx->cbs);
 693
 694         (void) vmw_context_bind_dx_query(res, NULL);
 695
 696         ttm_base_object_kfree(ctx, base);
 697         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 698                             vmw_user_context_size);
 699 }
 700
 701 /*
 702  * This function is called when user space has no more references on the
 703  * base object. It releases the base-object's reference on the resource object.
 704  */
 705
 706 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 707 {
 708         struct ttm_base_object *base = *p_base;
 709         struct vmw_user_context *ctx =
 710             container_of(base, struct vmw_user_context, base);
 711         struct vmw_resource *res = &ctx->res;
 712
 713         *p_base = NULL;
 714         vmw_resource_unreference(&res);
 715 }
 716
 717 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 718                               struct drm_file *file_priv)
 719 {
 720         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 721         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 722
 723         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 724 }
 725
 726 static int vmw_context_define(struct drm_device *dev, void *data,
 727                               struct drm_file *file_priv, bool dx)
 728 {
 729         struct vmw_private *dev_priv = vmw_priv(dev);
 730         struct vmw_user_context *ctx;
 731         struct vmw_resource *res;
 732         struct vmw_resource *tmp;
 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         struct ttm_operation_ctx ttm_opt_ctx = {
 736                 .interruptible = true,
 737                 .no_wait_gpu = false
 738         };
 739         int ret;
 740
 741         if (!has_sm4_context(dev_priv) && dx) {
 742                 VMW_DEBUG_USER("DX contexts not supported by device.\n");
 743                 return -EINVAL;
 744         }
 745
 746         if (unlikely(vmw_user_context_size == 0))
 747                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) +
 748                   ((dev_priv->has_mob) ? vmw_cmdbuf_res_man_size() : 0) +
 749                   + VMW_IDA_ACC_SIZE + TTM_OBJ_EXTRA_SIZE;
 750
 751         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 752         if (unlikely(ret != 0))
 753                 return ret;
 754
 755         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 756                                    vmw_user_context_size,
 757                                    &ttm_opt_ctx);
 758         if (unlikely(ret != 0)) {
 759                 if (ret != -ERESTARTSYS)
 760                         DRM_ERROR("Out of graphics memory for context"
 761                                   " creation.\n");
 762                 goto out_unlock;
 763         }
 764
 765         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 766         if (unlikely(!ctx)) {
 767                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 768                                     vmw_user_context_size);
 769                 ret = -ENOMEM;
 770                 goto out_unlock;
 771         }
 772
 773         res = &ctx->res;
 774         ctx->base.shareable = false;
 775         ctx->base.tfile = NULL;
 776
 777         /*
 778          * From here on, the destructor takes over resource freeing.
 779          */
 780
 781         ret = vmw_context_init(dev_priv, res, vmw_user_context_free, dx);
 782         if (unlikely(ret != 0))
 783                 goto out_unlock;
 784
 785         tmp = vmw_resource_reference(&ctx->res);
 786         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 787                                    &vmw_user_context_base_release, NULL);
 788
 789         if (unlikely(ret != 0)) {
 790                 vmw_resource_unreference(&tmp);
 791                 goto out_err;
 792         }
 793
 794         arg->cid = ctx->base.handle;
 795 out_err:
 796         vmw_resource_unreference(&res);
 797 out_unlock:
 798         ttm_read_unlock(&dev_priv->reservation_sem);
 799         return ret;
 800 }
 801
 802 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 803                              struct drm_file *file_priv)
 804 {
 805         return vmw_context_define(dev, data, file_priv, false);
 806 }
 807
 808 int vmw_extended_context_define_ioctl(struct drm_device *dev, void *data,
 809                                       struct drm_file *file_priv)
 810 {
 811         union drm_vmw_extended_context_arg *arg = (typeof(arg)) data;
 812         struct drm_vmw_context_arg *rep = &arg->rep;
 813
 814         switch (arg->req) {
 815         case drm_vmw_context_legacy:
 816                 return vmw_context_define(dev, rep, file_priv, false);
 817         case drm_vmw_context_dx:
 818                 return vmw_context_define(dev, rep, file_priv, true);
 819         default:
 820                 break;
 821         }
 822         return -EINVAL;
 823 }
 824
 825 /**
 826  * vmw_context_binding_list - Return a list of context bindings
 827  *
 828  * @ctx: The context resource
 829  *
 830  * Returns the current list of bindings of the given context. Note that
 831  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 832  */
 833 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
 834 {
 835         struct vmw_user_context *uctx =
 836                 container_of(ctx, struct vmw_user_context, res);
 837
 838         return vmw_binding_state_list(uctx->cbs);
 839 }
 840
 841 struct vmw_cmdbuf_res_manager *vmw_context_res_man(struct vmw_resource *ctx)
 842 {
 843         return container_of(ctx, struct vmw_user_context, res)->man;
 844 }
 845
 846 struct vmw_resource *vmw_context_cotable(struct vmw_resource *ctx,
 847                                          SVGACOTableType cotable_type)
 848 {
 849         u32 cotable_max = has_sm5_context(ctx->dev_priv) ?
 850                 SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
 851
 852         if (cotable_type >= cotable_max)
 853                 return ERR_PTR(-EINVAL);
 854
 855         return container_of(ctx, struct vmw_user_context, res)->
 856                 cotables[cotable_type];
 857 }
 858
 859 /**
 860  * vmw_context_binding_state -
 861  * Return a pointer to a context binding state structure
 862  *
 863  * @ctx: The context resource
 864  *
 865  * Returns the current state of bindings of the given context. Note that
 866  * this state becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 867  */
 868 struct vmw_ctx_binding_state *
 869 vmw_context_binding_state(struct vmw_resource *ctx)
 870 {
 871         return container_of(ctx, struct vmw_user_context, res)->cbs;
 872 }
 873
 874 /**
 875  * vmw_context_bind_dx_query -
 876  * Sets query MOB for the context.  If @mob is NULL, then this function will
 877  * remove the association between the MOB and the context.  This function
 878  * assumes the binding_mutex is held.
 879  *
 880  * @ctx_res: The context resource
 881  * @mob: a reference to the query MOB
 882  *
 883  * Returns -EINVAL if a MOB has already been set and does not match the one
 884  * specified in the parameter.  0 otherwise.
 885  */
 886 int vmw_context_bind_dx_query(struct vmw_resource *ctx_res,
 887                               struct vmw_buffer_object *mob)
 888 {
 889         struct vmw_user_context *uctx =
 890                 container_of(ctx_res, struct vmw_user_context, res);
 891
 892         if (mob == NULL) {
 893                 if (uctx->dx_query_mob) {
 894                         uctx->dx_query_mob->dx_query_ctx = NULL;
 895                         vmw_bo_unreference(&uctx->dx_query_mob);
 896                         uctx->dx_query_mob = NULL;
 897                 }
 898
 899                 return 0;
 900         }
 901
 902         /* Can only have one MOB per context for queries */
 903         if (uctx->dx_query_mob && uctx->dx_query_mob != mob)
 904                 return -EINVAL;
 905
 906         mob->dx_query_ctx  = ctx_res;
 907
 908         if (!uctx->dx_query_mob)
 909                 uctx->dx_query_mob = vmw_bo_reference(mob);
 910
 911         return 0;
 912 }
 913
 914 /**
 915  * vmw_context_get_dx_query_mob - Returns non-counted reference to DX query mob
 916  *
 917  * @ctx_res: The context resource
 918  */
 919 struct vmw_buffer_object *
 920 vmw_context_get_dx_query_mob(struct vmw_resource *ctx_res)
 921 {
 922         struct vmw_user_context *uctx =
 923                 container_of(ctx_res, struct vmw_user_context, res);
 924
 925         return uctx->dx_query_mob;
 926 }