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 <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_DX10_MAX];
  40         spinlock_t cotable_lock;
  41         struct vmw_dma_buffer *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         .type_name = "guest backed contexts",
  92         .backup_placement = &vmw_mob_placement,
  93         .create = vmw_gb_context_create,
  94         .destroy = vmw_gb_context_destroy,
  95         .bind = vmw_gb_context_bind,
  96         .unbind = vmw_gb_context_unbind
  97 };
  98
  99 static const struct vmw_res_func vmw_dx_context_func = {
 100         .res_type = vmw_res_dx_context,
 101         .needs_backup = true,
 102         .may_evict = true,
 103         .type_name = "dx contexts",
 104         .backup_placement = &vmw_mob_placement,
 105         .create = vmw_dx_context_create,
 106         .destroy = vmw_dx_context_destroy,
 107         .bind = vmw_dx_context_bind,
 108         .unbind = vmw_dx_context_unbind
 109 };
 110
 111 /**
 112  * Context management:
 113  */
 114
 115 static void vmw_context_cotables_unref(struct vmw_user_context *uctx)
 116 {
 117         struct vmw_resource *res;
 118         int i;
 119
 120         for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 121                 spin_lock(&uctx->cotable_lock);
 122                 res = uctx->cotables[i];
 123                 uctx->cotables[i] = NULL;
 124                 spin_unlock(&uctx->cotable_lock);
 125
 126                 if (res)
 127                         vmw_resource_unreference(&res);
 128         }
 129 }
 130
 131 static void vmw_hw_context_destroy(struct vmw_resource *res)
 132 {
 133         struct vmw_user_context *uctx =
 134                 container_of(res, struct vmw_user_context, res);
 135         struct vmw_private *dev_priv = res->dev_priv;
 136         struct {
 137                 SVGA3dCmdHeader header;
 138                 SVGA3dCmdDestroyContext body;
 139         } *cmd;
 140
 141
 142         if (res->func->destroy == vmw_gb_context_destroy ||
 143             res->func->destroy == vmw_dx_context_destroy) {
 144                 mutex_lock(&dev_priv->cmdbuf_mutex);
 145                 vmw_cmdbuf_res_man_destroy(uctx->man);
 146                 mutex_lock(&dev_priv->binding_mutex);
 147                 vmw_binding_state_kill(uctx->cbs);
 148                 (void) res->func->destroy(res);
 149                 mutex_unlock(&dev_priv->binding_mutex);
 150                 if (dev_priv->pinned_bo != NULL &&
 151                     !dev_priv->query_cid_valid)
 152                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 153                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 154                 vmw_context_cotables_unref(uctx);
 155                 return;
 156         }
 157
 158         vmw_execbuf_release_pinned_bo(dev_priv);
 159         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 160         if (unlikely(cmd == NULL)) {
 161                 DRM_ERROR("Failed reserving FIFO space for surface "
 162                           "destruction.\n");
 163                 return;
 164         }
 165
 166         cmd->header.id = SVGA_3D_CMD_CONTEXT_DESTROY;
 167         cmd->header.size = sizeof(cmd->body);
 168         cmd->body.cid = res->id;
 169
 170         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 171         vmw_fifo_resource_dec(dev_priv);
 172 }
 173
 174 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 175                                bool dx,
 176                                struct vmw_resource *res,
 177                                void (*res_free)(struct vmw_resource *res))
 178 {
 179         int ret, i;
 180         struct vmw_user_context *uctx =
 181                 container_of(res, struct vmw_user_context, res);
 182
 183         res->backup_size = (dx ? sizeof(SVGADXContextMobFormat) :
 184                             SVGA3D_CONTEXT_DATA_SIZE);
 185         ret = vmw_resource_init(dev_priv, res, true,
 186                                 res_free,
 187                                 dx ? &vmw_dx_context_func :
 188                                 &vmw_gb_context_func);
 189         if (unlikely(ret != 0))
 190                 goto out_err;
 191
 192         if (dev_priv->has_mob) {
 193                 uctx->man = vmw_cmdbuf_res_man_create(dev_priv);
 194                 if (IS_ERR(uctx->man)) {
 195                         ret = PTR_ERR(uctx->man);
 196                         uctx->man = NULL;
 197                         goto out_err;
 198                 }
 199         }
 200
 201         uctx->cbs = vmw_binding_state_alloc(dev_priv);
 202         if (IS_ERR(uctx->cbs)) {
 203                 ret = PTR_ERR(uctx->cbs);
 204                 goto out_err;
 205         }
 206
 207         spin_lock_init(&uctx->cotable_lock);
 208
 209         if (dx) {
 210                 for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 211                         uctx->cotables[i] = vmw_cotable_alloc(dev_priv,
 212                                                               &uctx->res, i);
 213                         if (unlikely(IS_ERR(uctx->cotables[i]))) {
 214                                 ret = PTR_ERR(uctx->cotables[i]);
 215                                 goto out_cotables;
 216                         }
 217                 }
 218         }
 219
 220
 221
 222         vmw_resource_activate(res, vmw_hw_context_destroy);
 223         return 0;
 224
 225 out_cotables:
 226         vmw_context_cotables_unref(uctx);
 227 out_err:
 228         if (res_free)
 229                 res_free(res);
 230         else
 231                 kfree(res);
 232         return ret;
 233 }
 234
 235 static int vmw_context_init(struct vmw_private *dev_priv,
 236                             struct vmw_resource *res,
 237                             void (*res_free)(struct vmw_resource *res),
 238                             bool dx)
 239 {
 240         int ret;
 241
 242         struct {
 243                 SVGA3dCmdHeader header;
 244                 SVGA3dCmdDefineContext body;
 245         } *cmd;
 246
 247         if (dev_priv->has_mob)
 248                 return vmw_gb_context_init(dev_priv, dx, res, res_free);
 249
 250         ret = vmw_resource_init(dev_priv, res, false,
 251                                 res_free, &vmw_legacy_context_func);
 252
 253         if (unlikely(ret != 0)) {
 254                 DRM_ERROR("Failed to allocate a resource id.\n");
 255                 goto out_early;
 256         }
 257
 258         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 259                 DRM_ERROR("Out of hw context ids.\n");
 260                 vmw_resource_unreference(&res);
 261                 return -ENOMEM;
 262         }
 263
 264         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 265         if (unlikely(cmd == NULL)) {
 266                 DRM_ERROR("Fifo reserve failed.\n");
 267                 vmw_resource_unreference(&res);
 268                 return -ENOMEM;
 269         }
 270
 271         cmd->header.id = SVGA_3D_CMD_CONTEXT_DEFINE;
 272         cmd->header.size = sizeof(cmd->body);
 273         cmd->body.cid = res->id;
 274
 275         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 276         vmw_fifo_resource_inc(dev_priv);
 277         vmw_resource_activate(res, vmw_hw_context_destroy);
 278         return 0;
 279
 280 out_early:
 281         if (res_free == NULL)
 282                 kfree(res);
 283         else
 284                 res_free(res);
 285         return ret;
 286 }
 287
 288
 289 /*
 290  * GB context.
 291  */
 292
 293 static int vmw_gb_context_create(struct vmw_resource *res)
 294 {
 295         struct vmw_private *dev_priv = res->dev_priv;
 296         int ret;
 297         struct {
 298                 SVGA3dCmdHeader header;
 299                 SVGA3dCmdDefineGBContext body;
 300         } *cmd;
 301
 302         if (likely(res->id != -1))
 303                 return 0;
 304
 305         ret = vmw_resource_alloc_id(res);
 306         if (unlikely(ret != 0)) {
 307                 DRM_ERROR("Failed to allocate a context id.\n");
 308                 goto out_no_id;
 309         }
 310
 311         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 312                 ret = -EBUSY;
 313                 goto out_no_fifo;
 314         }
 315
 316         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 317         if (unlikely(cmd == NULL)) {
 318                 DRM_ERROR("Failed reserving FIFO space for context "
 319                           "creation.\n");
 320                 ret = -ENOMEM;
 321                 goto out_no_fifo;
 322         }
 323
 324         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 325         cmd->header.size = sizeof(cmd->body);
 326         cmd->body.cid = res->id;
 327         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 328         vmw_fifo_resource_inc(dev_priv);
 329
 330         return 0;
 331
 332 out_no_fifo:
 333         vmw_resource_release_id(res);
 334 out_no_id:
 335         return ret;
 336 }
 337
 338 static int vmw_gb_context_bind(struct vmw_resource *res,
 339                                struct ttm_validate_buffer *val_buf)
 340 {
 341         struct vmw_private *dev_priv = res->dev_priv;
 342         struct {
 343                 SVGA3dCmdHeader header;
 344                 SVGA3dCmdBindGBContext body;
 345         } *cmd;
 346         struct ttm_buffer_object *bo = val_buf->bo;
 347
 348         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 349
 350         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 351         if (unlikely(cmd == NULL)) {
 352                 DRM_ERROR("Failed reserving FIFO space for context "
 353                           "binding.\n");
 354                 return -ENOMEM;
 355         }
 356         cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 357         cmd->header.size = sizeof(cmd->body);
 358         cmd->body.cid = res->id;
 359         cmd->body.mobid = bo->mem.start;
 360         cmd->body.validContents = res->backup_dirty;
 361         res->backup_dirty = false;
 362         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 363
 364         return 0;
 365 }
 366
 367 static int vmw_gb_context_unbind(struct vmw_resource *res,
 368                                  bool readback,
 369                                  struct ttm_validate_buffer *val_buf)
 370 {
 371         struct vmw_private *dev_priv = res->dev_priv;
 372         struct ttm_buffer_object *bo = val_buf->bo;
 373         struct vmw_fence_obj *fence;
 374         struct vmw_user_context *uctx =
 375                 container_of(res, struct vmw_user_context, res);
 376
 377         struct {
 378                 SVGA3dCmdHeader header;
 379                 SVGA3dCmdReadbackGBContext body;
 380         } *cmd1;
 381         struct {
 382                 SVGA3dCmdHeader header;
 383                 SVGA3dCmdBindGBContext body;
 384         } *cmd2;
 385         uint32_t submit_size;
 386         uint8_t *cmd;
 387
 388
 389         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 390
 391         mutex_lock(&dev_priv->binding_mutex);
 392         vmw_binding_state_scrub(uctx->cbs);
 393
 394         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 395
 396         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 397         if (unlikely(cmd == NULL)) {
 398                 DRM_ERROR("Failed reserving FIFO space for context "
 399                           "unbinding.\n");
 400                 mutex_unlock(&dev_priv->binding_mutex);
 401                 return -ENOMEM;
 402         }
 403
 404         cmd2 = (void *) cmd;
 405         if (readback) {
 406                 cmd1 = (void *) cmd;
 407                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 408                 cmd1->header.size = sizeof(cmd1->body);
 409                 cmd1->body.cid = res->id;
 410                 cmd2 = (void *) (&cmd1[1]);
 411         }
 412         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 413         cmd2->header.size = sizeof(cmd2->body);
 414         cmd2->body.cid = res->id;
 415         cmd2->body.mobid = SVGA3D_INVALID_ID;
 416
 417         vmw_fifo_commit(dev_priv, submit_size);
 418         mutex_unlock(&dev_priv->binding_mutex);
 419
 420         /*
 421          * Create a fence object and fence the backup buffer.
 422          */
 423
 424         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 425                                           &fence, NULL);
 426
 427         vmw_fence_single_bo(bo, fence);
 428
 429         if (likely(fence != NULL))
 430                 vmw_fence_obj_unreference(&fence);
 431
 432         return 0;
 433 }
 434
 435 static int vmw_gb_context_destroy(struct vmw_resource *res)
 436 {
 437         struct vmw_private *dev_priv = res->dev_priv;
 438         struct {
 439                 SVGA3dCmdHeader header;
 440                 SVGA3dCmdDestroyGBContext body;
 441         } *cmd;
 442
 443         if (likely(res->id == -1))
 444                 return 0;
 445
 446         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 447         if (unlikely(cmd == NULL)) {
 448                 DRM_ERROR("Failed reserving FIFO space for context "
 449                           "destruction.\n");
 450                 return -ENOMEM;
 451         }
 452
 453         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 454         cmd->header.size = sizeof(cmd->body);
 455         cmd->body.cid = res->id;
 456         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 457         if (dev_priv->query_cid == res->id)
 458                 dev_priv->query_cid_valid = false;
 459         vmw_resource_release_id(res);
 460         vmw_fifo_resource_dec(dev_priv);
 461
 462         return 0;
 463 }
 464
 465 /*
 466  * DX context.
 467  */
 468
 469 static int vmw_dx_context_create(struct vmw_resource *res)
 470 {
 471         struct vmw_private *dev_priv = res->dev_priv;
 472         int ret;
 473         struct {
 474                 SVGA3dCmdHeader header;
 475                 SVGA3dCmdDXDefineContext body;
 476         } *cmd;
 477
 478         if (likely(res->id != -1))
 479                 return 0;
 480
 481         ret = vmw_resource_alloc_id(res);
 482         if (unlikely(ret != 0)) {
 483                 DRM_ERROR("Failed to allocate a context id.\n");
 484                 goto out_no_id;
 485         }
 486
 487         if (unlikely(res->id >= VMWGFX_NUM_DXCONTEXT)) {
 488                 ret = -EBUSY;
 489                 goto out_no_fifo;
 490         }
 491
 492         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 493         if (unlikely(cmd == NULL)) {
 494                 DRM_ERROR("Failed reserving FIFO space for context "
 495                           "creation.\n");
 496                 ret = -ENOMEM;
 497                 goto out_no_fifo;
 498         }
 499
 500         cmd->header.id = SVGA_3D_CMD_DX_DEFINE_CONTEXT;
 501         cmd->header.size = sizeof(cmd->body);
 502         cmd->body.cid = res->id;
 503         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 504         vmw_fifo_resource_inc(dev_priv);
 505
 506         return 0;
 507
 508 out_no_fifo:
 509         vmw_resource_release_id(res);
 510 out_no_id:
 511         return ret;
 512 }
 513
 514 static int vmw_dx_context_bind(struct vmw_resource *res,
 515                                struct ttm_validate_buffer *val_buf)
 516 {
 517         struct vmw_private *dev_priv = res->dev_priv;
 518         struct {
 519                 SVGA3dCmdHeader header;
 520                 SVGA3dCmdDXBindContext body;
 521         } *cmd;
 522         struct ttm_buffer_object *bo = val_buf->bo;
 523
 524         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 525
 526         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 527         if (unlikely(cmd == NULL)) {
 528                 DRM_ERROR("Failed reserving FIFO space for context "
 529                           "binding.\n");
 530                 return -ENOMEM;
 531         }
 532
 533         cmd->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 534         cmd->header.size = sizeof(cmd->body);
 535         cmd->body.cid = res->id;
 536         cmd->body.mobid = bo->mem.start;
 537         cmd->body.validContents = res->backup_dirty;
 538         res->backup_dirty = false;
 539         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 540
 541
 542         return 0;
 543 }
 544
 545 /**
 546  * vmw_dx_context_scrub_cotables - Scrub all bindings and
 547  * cotables from a context
 548  *
 549  * @ctx: Pointer to the context resource
 550  * @readback: Whether to save the otable contents on scrubbing.
 551  *
 552  * COtables must be unbound before their context, but unbinding requires
 553  * the backup buffer being reserved, whereas scrubbing does not.
 554  * This function scrubs all cotables of a context, potentially reading back
 555  * the contents into their backup buffers. However, scrubbing cotables
 556  * also makes the device context invalid, so scrub all bindings first so
 557  * that doesn't have to be done later with an invalid context.
 558  */
 559 void vmw_dx_context_scrub_cotables(struct vmw_resource *ctx,
 560                                    bool readback)
 561 {
 562         struct vmw_user_context *uctx =
 563                 container_of(ctx, struct vmw_user_context, res);
 564         int i;
 565
 566         vmw_binding_state_scrub(uctx->cbs);
 567         for (i = 0; i < SVGA_COTABLE_DX10_MAX; ++i) {
 568                 struct vmw_resource *res;
 569
 570                 /* Avoid racing with ongoing cotable destruction. */
 571                 spin_lock(&uctx->cotable_lock);
 572                 res = uctx->cotables[vmw_cotable_scrub_order[i]];
 573                 if (res)
 574                         res = vmw_resource_reference_unless_doomed(res);
 575                 spin_unlock(&uctx->cotable_lock);
 576                 if (!res)
 577                         continue;
 578
 579                 WARN_ON(vmw_cotable_scrub(res, readback));
 580                 vmw_resource_unreference(&res);
 581         }
 582 }
 583
 584 static int vmw_dx_context_unbind(struct vmw_resource *res,
 585                                  bool readback,
 586                                  struct ttm_validate_buffer *val_buf)
 587 {
 588         struct vmw_private *dev_priv = res->dev_priv;
 589         struct ttm_buffer_object *bo = val_buf->bo;
 590         struct vmw_fence_obj *fence;
 591         struct vmw_user_context *uctx =
 592                 container_of(res, struct vmw_user_context, res);
 593
 594         struct {
 595                 SVGA3dCmdHeader header;
 596                 SVGA3dCmdDXReadbackContext body;
 597         } *cmd1;
 598         struct {
 599                 SVGA3dCmdHeader header;
 600                 SVGA3dCmdDXBindContext body;
 601         } *cmd2;
 602         uint32_t submit_size;
 603         uint8_t *cmd;
 604
 605
 606         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 607
 608         mutex_lock(&dev_priv->binding_mutex);
 609         vmw_dx_context_scrub_cotables(res, readback);
 610
 611         if (uctx->dx_query_mob && uctx->dx_query_mob->dx_query_ctx &&
 612             readback) {
 613                 WARN_ON(uctx->dx_query_mob->dx_query_ctx != res);
 614                 if (vmw_query_readback_all(uctx->dx_query_mob))
 615                         DRM_ERROR("Failed to read back query states\n");
 616         }
 617
 618         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 619
 620         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 621         if (unlikely(cmd == NULL)) {
 622                 DRM_ERROR("Failed reserving FIFO space for context "
 623                           "unbinding.\n");
 624                 mutex_unlock(&dev_priv->binding_mutex);
 625                 return -ENOMEM;
 626         }
 627
 628         cmd2 = (void *) cmd;
 629         if (readback) {
 630                 cmd1 = (void *) cmd;
 631                 cmd1->header.id = SVGA_3D_CMD_DX_READBACK_CONTEXT;
 632                 cmd1->header.size = sizeof(cmd1->body);
 633                 cmd1->body.cid = res->id;
 634                 cmd2 = (void *) (&cmd1[1]);
 635         }
 636         cmd2->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
 637         cmd2->header.size = sizeof(cmd2->body);
 638         cmd2->body.cid = res->id;
 639         cmd2->body.mobid = SVGA3D_INVALID_ID;
 640
 641         vmw_fifo_commit(dev_priv, submit_size);
 642         mutex_unlock(&dev_priv->binding_mutex);
 643
 644         /*
 645          * Create a fence object and fence the backup buffer.
 646          */
 647
 648         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 649                                           &fence, NULL);
 650
 651         vmw_fence_single_bo(bo, fence);
 652
 653         if (likely(fence != NULL))
 654                 vmw_fence_obj_unreference(&fence);
 655
 656         return 0;
 657 }
 658
 659 static int vmw_dx_context_destroy(struct vmw_resource *res)
 660 {
 661         struct vmw_private *dev_priv = res->dev_priv;
 662         struct {
 663                 SVGA3dCmdHeader header;
 664                 SVGA3dCmdDXDestroyContext body;
 665         } *cmd;
 666
 667         if (likely(res->id == -1))
 668                 return 0;
 669
 670         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 671         if (unlikely(cmd == NULL)) {
 672                 DRM_ERROR("Failed reserving FIFO space for context "
 673                           "destruction.\n");
 674                 return -ENOMEM;
 675         }
 676
 677         cmd->header.id = SVGA_3D_CMD_DX_DESTROY_CONTEXT;
 678         cmd->header.size = sizeof(cmd->body);
 679         cmd->body.cid = res->id;
 680         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 681         if (dev_priv->query_cid == res->id)
 682                 dev_priv->query_cid_valid = false;
 683         vmw_resource_release_id(res);
 684         vmw_fifo_resource_dec(dev_priv);
 685
 686         return 0;
 687 }
 688
 689 /**
 690  * User-space context management:
 691  */
 692
 693 static struct vmw_resource *
 694 vmw_user_context_base_to_res(struct ttm_base_object *base)
 695 {
 696         return &(container_of(base, struct vmw_user_context, base)->res);
 697 }
 698
 699 static void vmw_user_context_free(struct vmw_resource *res)
 700 {
 701         struct vmw_user_context *ctx =
 702             container_of(res, struct vmw_user_context, res);
 703         struct vmw_private *dev_priv = res->dev_priv;
 704
 705         if (ctx->cbs)
 706                 vmw_binding_state_free(ctx->cbs);
 707
 708         (void) vmw_context_bind_dx_query(res, NULL);
 709
 710         ttm_base_object_kfree(ctx, base);
 711         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 712                             vmw_user_context_size);
 713 }
 714
 715 /**
 716  * This function is called when user space has no more references on the
 717  * base object. It releases the base-object's reference on the resource object.
 718  */
 719
 720 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 721 {
 722         struct ttm_base_object *base = *p_base;
 723         struct vmw_user_context *ctx =
 724             container_of(base, struct vmw_user_context, base);
 725         struct vmw_resource *res = &ctx->res;
 726
 727         *p_base = NULL;
 728         vmw_resource_unreference(&res);
 729 }
 730
 731 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 732                               struct drm_file *file_priv)
 733 {
 734         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 735         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 736
 737         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 738 }
 739
 740 static int vmw_context_define(struct drm_device *dev, void *data,
 741                               struct drm_file *file_priv, bool dx)
 742 {
 743         struct vmw_private *dev_priv = vmw_priv(dev);
 744         struct vmw_user_context *ctx;
 745         struct vmw_resource *res;
 746         struct vmw_resource *tmp;
 747         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 748         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 749         int ret;
 750
 751         if (!dev_priv->has_dx && dx) {
 752                 DRM_ERROR("DX contexts not supported by device.\n");
 753                 return -EINVAL;
 754         }
 755
 756         /*
 757          * Approximate idr memory usage with 128 bytes. It will be limited
 758          * by maximum number_of contexts anyway.
 759          */
 760
 761         if (unlikely(vmw_user_context_size == 0))
 762                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128 +
 763                   ((dev_priv->has_mob) ? vmw_cmdbuf_res_man_size() : 0);
 764
 765         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 766         if (unlikely(ret != 0))
 767                 return ret;
 768
 769         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 770                                    vmw_user_context_size,
 771                                    false, true);
 772         if (unlikely(ret != 0)) {
 773                 if (ret != -ERESTARTSYS)
 774                         DRM_ERROR("Out of graphics memory for context"
 775                                   " creation.\n");
 776                 goto out_unlock;
 777         }
 778
 779         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 780         if (unlikely(!ctx)) {
 781                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 782                                     vmw_user_context_size);
 783                 ret = -ENOMEM;
 784                 goto out_unlock;
 785         }
 786
 787         res = &ctx->res;
 788         ctx->base.shareable = false;
 789         ctx->base.tfile = NULL;
 790
 791         /*
 792          * From here on, the destructor takes over resource freeing.
 793          */
 794
 795         ret = vmw_context_init(dev_priv, res, vmw_user_context_free, dx);
 796         if (unlikely(ret != 0))
 797                 goto out_unlock;
 798
 799         tmp = vmw_resource_reference(&ctx->res);
 800         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 801                                    &vmw_user_context_base_release, NULL);
 802
 803         if (unlikely(ret != 0)) {
 804                 vmw_resource_unreference(&tmp);
 805                 goto out_err;
 806         }
 807
 808         arg->cid = ctx->base.hash.key;
 809 out_err:
 810         vmw_resource_unreference(&res);
 811 out_unlock:
 812         ttm_read_unlock(&dev_priv->reservation_sem);
 813         return ret;
 814 }
 815
 816 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 817                              struct drm_file *file_priv)
 818 {
 819         return vmw_context_define(dev, data, file_priv, false);
 820 }
 821
 822 int vmw_extended_context_define_ioctl(struct drm_device *dev, void *data,
 823                                       struct drm_file *file_priv)
 824 {
 825         union drm_vmw_extended_context_arg *arg = (typeof(arg)) data;
 826         struct drm_vmw_context_arg *rep = &arg->rep;
 827
 828         switch (arg->req) {
 829         case drm_vmw_context_legacy:
 830                 return vmw_context_define(dev, rep, file_priv, false);
 831         case drm_vmw_context_dx:
 832                 return vmw_context_define(dev, rep, file_priv, true);
 833         default:
 834                 break;
 835         }
 836         return -EINVAL;
 837 }
 838
 839 /**
 840  * vmw_context_binding_list - Return a list of context bindings
 841  *
 842  * @ctx: The context resource
 843  *
 844  * Returns the current list of bindings of the given context. Note that
 845  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 846  */
 847 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
 848 {
 849         struct vmw_user_context *uctx =
 850                 container_of(ctx, struct vmw_user_context, res);
 851
 852         return vmw_binding_state_list(uctx->cbs);
 853 }
 854
 855 struct vmw_cmdbuf_res_manager *vmw_context_res_man(struct vmw_resource *ctx)
 856 {
 857         return container_of(ctx, struct vmw_user_context, res)->man;
 858 }
 859
 860 struct vmw_resource *vmw_context_cotable(struct vmw_resource *ctx,
 861                                          SVGACOTableType cotable_type)
 862 {
 863         if (cotable_type >= SVGA_COTABLE_DX10_MAX)
 864                 return ERR_PTR(-EINVAL);
 865
 866         return vmw_resource_reference
 867                 (container_of(ctx, struct vmw_user_context, res)->
 868                  cotables[cotable_type]);
 869 }
 870
 871 /**
 872  * vmw_context_binding_state -
 873  * Return a pointer to a context binding state structure
 874  *
 875  * @ctx: The context resource
 876  *
 877  * Returns the current state of bindings of the given context. Note that
 878  * this state becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 879  */
 880 struct vmw_ctx_binding_state *
 881 vmw_context_binding_state(struct vmw_resource *ctx)
 882 {
 883         return container_of(ctx, struct vmw_user_context, res)->cbs;
 884 }
 885
 886 /**
 887  * vmw_context_bind_dx_query -
 888  * Sets query MOB for the context.  If @mob is NULL, then this function will
 889  * remove the association between the MOB and the context.  This function
 890  * assumes the binding_mutex is held.
 891  *
 892  * @ctx_res: The context resource
 893  * @mob: a reference to the query MOB
 894  *
 895  * Returns -EINVAL if a MOB has already been set and does not match the one
 896  * specified in the parameter.  0 otherwise.
 897  */
 898 int vmw_context_bind_dx_query(struct vmw_resource *ctx_res,
 899                               struct vmw_dma_buffer *mob)
 900 {
 901         struct vmw_user_context *uctx =
 902                 container_of(ctx_res, struct vmw_user_context, res);
 903
 904         if (mob == NULL) {
 905                 if (uctx->dx_query_mob) {
 906                         uctx->dx_query_mob->dx_query_ctx = NULL;
 907                         vmw_dmabuf_unreference(&uctx->dx_query_mob);
 908                         uctx->dx_query_mob = NULL;
 909                 }
 910
 911                 return 0;
 912         }
 913
 914         /* Can only have one MOB per context for queries */
 915         if (uctx->dx_query_mob && uctx->dx_query_mob != mob)
 916                 return -EINVAL;
 917
 918         mob->dx_query_ctx  = ctx_res;
 919
 920         if (!uctx->dx_query_mob)
 921                 uctx->dx_query_mob = vmw_dmabuf_reference(mob);
 922
 923         return 0;
 924 }
 925
 926 /**
 927  * vmw_context_get_dx_query_mob - Returns non-counted reference to DX query mob
 928  *
 929  * @ctx_res: The context resource
 930  */
 931 struct vmw_dma_buffer *
 932 vmw_context_get_dx_query_mob(struct vmw_resource *ctx_res)
 933 {
 934         struct vmw_user_context *uctx =
 935                 container_of(ctx_res, struct vmw_user_context, res);
 936
 937         return uctx->dx_query_mob;
 938 }