drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include "vmwgfx_reg.h"
  30 #include <drm/ttm/ttm_bo_api.h>
  31 #include <drm/ttm/ttm_placement.h>
  32
  33 #define VMW_RES_HT_ORDER 12
  34
  35 /**
  36  * struct vmw_resource_relocation - Relocation info for resources
  37  *
  38  * @head: List head for the software context's relocation list.
  39  * @res: Non-ref-counted pointer to the resource.
  40  * @offset: Offset of 4 byte entries into the command buffer where the
  41  * id that needs fixup is located.
  42  */
  43 struct vmw_resource_relocation {
  44         struct list_head head;
  45         const struct vmw_resource *res;
  46         unsigned long offset;
  47 };
  48
  49 /**
  50  * struct vmw_resource_val_node - Validation info for resources
  51  *
  52  * @head: List head for the software context's resource list.
  53  * @hash: Hash entry for quick resouce to val_node lookup.
  54  * @res: Ref-counted pointer to the resource.
  55  * @switch_backup: Boolean whether to switch backup buffer on unreserve.
  56  * @new_backup: Refcounted pointer to the new backup buffer.
  57  * @staged_bindings: If @res is a context, tracks bindings set up during
  58  * the command batch. Otherwise NULL.
  59  * @new_backup_offset: New backup buffer offset if @new_backup is non-NUll.
  60  * @first_usage: Set to true the first time the resource is referenced in
  61  * the command stream.
  62  * @no_buffer_needed: Resources do not need to allocate buffer backup on
  63  * reservation. The command stream will provide one.
  64  */
  65 struct vmw_resource_val_node {
  66         struct list_head head;
  67         struct drm_hash_item hash;
  68         struct vmw_resource *res;
  69         struct vmw_dma_buffer *new_backup;
  70         struct vmw_ctx_binding_state *staged_bindings;
  71         unsigned long new_backup_offset;
  72         bool first_usage;
  73         bool no_buffer_needed;
  74 };
  75
  76 /**
  77  * struct vmw_cmd_entry - Describe a command for the verifier
  78  *
  79  * @user_allow: Whether allowed from the execbuf ioctl.
  80  * @gb_disable: Whether disabled if guest-backed objects are available.
  81  * @gb_enable: Whether enabled iff guest-backed objects are available.
  82  */
  83 struct vmw_cmd_entry {
  84         int (*func) (struct vmw_private *, struct vmw_sw_context *,
  85                      SVGA3dCmdHeader *);
  86         bool user_allow;
  87         bool gb_disable;
  88         bool gb_enable;
  89 };
  90
  91 #define VMW_CMD_DEF(_cmd, _func, _user_allow, _gb_disable, _gb_enable)  \
  92         [(_cmd) - SVGA_3D_CMD_BASE] = {(_func), (_user_allow),\
  93                                        (_gb_disable), (_gb_enable)}
  94
  95 /**
  96  * vmw_resource_unreserve - unreserve resources previously reserved for
  97  * command submission.
  98  *
  99  * @list_head: list of resources to unreserve.
 100  * @backoff: Whether command submission failed.
 101  */
 102 static void vmw_resource_list_unreserve(struct list_head *list,
 103                                         bool backoff)
 104 {
 105         struct vmw_resource_val_node *val;
 106
 107         list_for_each_entry(val, list, head) {
 108                 struct vmw_resource *res = val->res;
 109                 struct vmw_dma_buffer *new_backup =
 110                         backoff ? NULL : val->new_backup;
 111
 112                 /*
 113                  * Transfer staged context bindings to the
 114                  * persistent context binding tracker.
 115                  */
 116                 if (unlikely(val->staged_bindings)) {
 117                         if (!backoff) {
 118                                 vmw_context_binding_state_transfer
 119                                         (val->res, val->staged_bindings);
 120                         }
 121                         kfree(val->staged_bindings);
 122                         val->staged_bindings = NULL;
 123                 }
 124                 vmw_resource_unreserve(res, new_backup,
 125                         val->new_backup_offset);
 126                 vmw_dmabuf_unreference(&val->new_backup);
 127         }
 128 }
 129
 130
 131 /**
 132  * vmw_resource_val_add - Add a resource to the software context's
 133  * resource list if it's not already on it.
 134  *
 135  * @sw_context: Pointer to the software context.
 136  * @res: Pointer to the resource.
 137  * @p_node On successful return points to a valid pointer to a
 138  * struct vmw_resource_val_node, if non-NULL on entry.
 139  */
 140 static int vmw_resource_val_add(struct vmw_sw_context *sw_context,
 141                                 struct vmw_resource *res,
 142                                 struct vmw_resource_val_node **p_node)
 143 {
 144         struct vmw_resource_val_node *node;
 145         struct drm_hash_item *hash;
 146         int ret;
 147
 148         if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) res,
 149                                     &hash) == 0)) {
 150                 node = container_of(hash, struct vmw_resource_val_node, hash);
 151                 node->first_usage = false;
 152                 if (unlikely(p_node != NULL))
 153                         *p_node = node;
 154                 return 0;
 155         }
 156
 157         node = kzalloc(sizeof(*node), GFP_KERNEL);
 158         if (unlikely(node == NULL)) {
 159                 DRM_ERROR("Failed to allocate a resource validation "
 160                           "entry.\n");
 161                 return -ENOMEM;
 162         }
 163
 164         node->hash.key = (unsigned long) res;
 165         ret = drm_ht_insert_item(&sw_context->res_ht, &node->hash);
 166         if (unlikely(ret != 0)) {
 167                 DRM_ERROR("Failed to initialize a resource validation "
 168                           "entry.\n");
 169                 kfree(node);
 170                 return ret;
 171         }
 172         list_add_tail(&node->head, &sw_context->resource_list);
 173         node->res = vmw_resource_reference(res);
 174         node->first_usage = true;
 175
 176         if (unlikely(p_node != NULL))
 177                 *p_node = node;
 178
 179         return 0;
 180 }
 181
 182 /**
 183  * vmw_resource_context_res_add - Put resources previously bound to a context on
 184  * the validation list
 185  *
 186  * @dev_priv: Pointer to a device private structure
 187  * @sw_context: Pointer to a software context used for this command submission
 188  * @ctx: Pointer to the context resource
 189  *
 190  * This function puts all resources that were previously bound to @ctx on
 191  * the resource validation list. This is part of the context state reemission
 192  */
 193 static int vmw_resource_context_res_add(struct vmw_private *dev_priv,
 194                                         struct vmw_sw_context *sw_context,
 195                                         struct vmw_resource *ctx)
 196 {
 197         struct list_head *binding_list;
 198         struct vmw_ctx_binding *entry;
 199         int ret = 0;
 200         struct vmw_resource *res;
 201
 202         mutex_lock(&dev_priv->binding_mutex);
 203         binding_list = vmw_context_binding_list(ctx);
 204
 205         list_for_each_entry(entry, binding_list, ctx_list) {
 206                 res = vmw_resource_reference_unless_doomed(entry->bi.res);
 207                 if (unlikely(res == NULL))
 208                         continue;
 209
 210                 ret = vmw_resource_val_add(sw_context, entry->bi.res, NULL);
 211                 vmw_resource_unreference(&res);
 212                 if (unlikely(ret != 0))
 213                         break;
 214         }
 215
 216         mutex_unlock(&dev_priv->binding_mutex);
 217         return ret;
 218 }
 219
 220 /**
 221  * vmw_resource_relocation_add - Add a relocation to the relocation list
 222  *
 223  * @list: Pointer to head of relocation list.
 224  * @res: The resource.
 225  * @offset: Offset into the command buffer currently being parsed where the
 226  * id that needs fixup is located. Granularity is 4 bytes.
 227  */
 228 static int vmw_resource_relocation_add(struct list_head *list,
 229                                        const struct vmw_resource *res,
 230                                        unsigned long offset)
 231 {
 232         struct vmw_resource_relocation *rel;
 233
 234         rel = kmalloc(sizeof(*rel), GFP_KERNEL);
 235         if (unlikely(rel == NULL)) {
 236                 DRM_ERROR("Failed to allocate a resource relocation.\n");
 237                 return -ENOMEM;
 238         }
 239
 240         rel->res = res;
 241         rel->offset = offset;
 242         list_add_tail(&rel->head, list);
 243
 244         return 0;
 245 }
 246
 247 /**
 248  * vmw_resource_relocations_free - Free all relocations on a list
 249  *
 250  * @list: Pointer to the head of the relocation list.
 251  */
 252 static void vmw_resource_relocations_free(struct list_head *list)
 253 {
 254         struct vmw_resource_relocation *rel, *n;
 255
 256         list_for_each_entry_safe(rel, n, list, head) {
 257                 list_del(&rel->head);
 258                 kfree(rel);
 259         }
 260 }
 261
 262 /**
 263  * vmw_resource_relocations_apply - Apply all relocations on a list
 264  *
 265  * @cb: Pointer to the start of the command buffer bein patch. This need
 266  * not be the same buffer as the one being parsed when the relocation
 267  * list was built, but the contents must be the same modulo the
 268  * resource ids.
 269  * @list: Pointer to the head of the relocation list.
 270  */
 271 static void vmw_resource_relocations_apply(uint32_t *cb,
 272                                            struct list_head *list)
 273 {
 274         struct vmw_resource_relocation *rel;
 275
 276         list_for_each_entry(rel, list, head) {
 277                 if (likely(rel->res != NULL))
 278                         cb[rel->offset] = rel->res->id;
 279                 else
 280                         cb[rel->offset] = SVGA_3D_CMD_NOP;
 281         }
 282 }
 283
 284 static int vmw_cmd_invalid(struct vmw_private *dev_priv,
 285                            struct vmw_sw_context *sw_context,
 286                            SVGA3dCmdHeader *header)
 287 {
 288         return capable(CAP_SYS_ADMIN) ? : -EINVAL;
 289 }
 290
 291 static int vmw_cmd_ok(struct vmw_private *dev_priv,
 292                       struct vmw_sw_context *sw_context,
 293                       SVGA3dCmdHeader *header)
 294 {
 295         return 0;
 296 }
 297
 298 /**
 299  * vmw_bo_to_validate_list - add a bo to a validate list
 300  *
 301  * @sw_context: The software context used for this command submission batch.
 302  * @bo: The buffer object to add.
 303  * @validate_as_mob: Validate this buffer as a MOB.
 304  * @p_val_node: If non-NULL Will be updated with the validate node number
 305  * on return.
 306  *
 307  * Returns -EINVAL if the limit of number of buffer objects per command
 308  * submission is reached.
 309  */
 310 static int vmw_bo_to_validate_list(struct vmw_sw_context *sw_context,
 311                                    struct ttm_buffer_object *bo,
 312                                    bool validate_as_mob,
 313                                    uint32_t *p_val_node)
 314 {
 315         uint32_t val_node;
 316         struct vmw_validate_buffer *vval_buf;
 317         struct ttm_validate_buffer *val_buf;
 318         struct drm_hash_item *hash;
 319         int ret;
 320
 321         if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) bo,
 322                                     &hash) == 0)) {
 323                 vval_buf = container_of(hash, struct vmw_validate_buffer,
 324                                         hash);
 325                 if (unlikely(vval_buf->validate_as_mob != validate_as_mob)) {
 326                         DRM_ERROR("Inconsistent buffer usage.\n");
 327                         return -EINVAL;
 328                 }
 329                 val_buf = &vval_buf->base;
 330                 val_node = vval_buf - sw_context->val_bufs;
 331         } else {
 332                 val_node = sw_context->cur_val_buf;
 333                 if (unlikely(val_node >= VMWGFX_MAX_VALIDATIONS)) {
 334                         DRM_ERROR("Max number of DMA buffers per submission "
 335                                   "exceeded.\n");
 336                         return -EINVAL;
 337                 }
 338                 vval_buf = &sw_context->val_bufs[val_node];
 339                 vval_buf->hash.key = (unsigned long) bo;
 340                 ret = drm_ht_insert_item(&sw_context->res_ht, &vval_buf->hash);
 341                 if (unlikely(ret != 0)) {
 342                         DRM_ERROR("Failed to initialize a buffer validation "
 343                                   "entry.\n");
 344                         return ret;
 345                 }
 346                 ++sw_context->cur_val_buf;
 347                 val_buf = &vval_buf->base;
 348                 val_buf->bo = ttm_bo_reference(bo);
 349                 val_buf->shared = false;
 350                 list_add_tail(&val_buf->head, &sw_context->validate_nodes);
 351                 vval_buf->validate_as_mob = validate_as_mob;
 352         }
 353
 354         if (p_val_node)
 355                 *p_val_node = val_node;
 356
 357         return 0;
 358 }
 359
 360 /**
 361  * vmw_resources_reserve - Reserve all resources on the sw_context's
 362  * resource list.
 363  *
 364  * @sw_context: Pointer to the software context.
 365  *
 366  * Note that since vmware's command submission currently is protected by
 367  * the cmdbuf mutex, no fancy deadlock avoidance is required for resources,
 368  * since only a single thread at once will attempt this.
 369  */
 370 static int vmw_resources_reserve(struct vmw_sw_context *sw_context)
 371 {
 372         struct vmw_resource_val_node *val;
 373         int ret;
 374
 375         list_for_each_entry(val, &sw_context->resource_list, head) {
 376                 struct vmw_resource *res = val->res;
 377
 378                 ret = vmw_resource_reserve(res, val->no_buffer_needed);
 379                 if (unlikely(ret != 0))
 380                         return ret;
 381
 382                 if (res->backup) {
 383                         struct ttm_buffer_object *bo = &res->backup->base;
 384
 385                         ret = vmw_bo_to_validate_list
 386                                 (sw_context, bo,
 387                                  vmw_resource_needs_backup(res), NULL);
 388
 389                         if (unlikely(ret != 0))
 390                                 return ret;
 391                 }
 392         }
 393         return 0;
 394 }
 395
 396 /**
 397  * vmw_resources_validate - Validate all resources on the sw_context's
 398  * resource list.
 399  *
 400  * @sw_context: Pointer to the software context.
 401  *
 402  * Before this function is called, all resource backup buffers must have
 403  * been validated.
 404  */
 405 static int vmw_resources_validate(struct vmw_sw_context *sw_context)
 406 {
 407         struct vmw_resource_val_node *val;
 408         int ret;
 409
 410         list_for_each_entry(val, &sw_context->resource_list, head) {
 411                 struct vmw_resource *res = val->res;
 412
 413                 ret = vmw_resource_validate(res);
 414                 if (unlikely(ret != 0)) {
 415                         if (ret != -ERESTARTSYS)
 416                                 DRM_ERROR("Failed to validate resource.\n");
 417                         return ret;
 418                 }
 419         }
 420         return 0;
 421 }
 422
 423
 424 /**
 425  * vmw_cmd_res_reloc_add - Add a resource to a software context's
 426  * relocation- and validation lists.
 427  *
 428  * @dev_priv: Pointer to a struct vmw_private identifying the device.
 429  * @sw_context: Pointer to the software context.
 430  * @res_type: Resource type.
 431  * @id_loc: Pointer to where the id that needs translation is located.
 432  * @res: Valid pointer to a struct vmw_resource.
 433  * @p_val: If non null, a pointer to the struct vmw_resource_validate_node
 434  * used for this resource is returned here.
 435  */
 436 static int vmw_cmd_res_reloc_add(struct vmw_private *dev_priv,
 437                                  struct vmw_sw_context *sw_context,
 438                                  enum vmw_res_type res_type,
 439                                  uint32_t *id_loc,
 440                                  struct vmw_resource *res,
 441                                  struct vmw_resource_val_node **p_val)
 442 {
 443         int ret;
 444         struct vmw_resource_val_node *node;
 445
 446         *p_val = NULL;
 447         ret = vmw_resource_relocation_add(&sw_context->res_relocations,
 448                                           res,
 449                                           id_loc - sw_context->buf_start);
 450         if (unlikely(ret != 0))
 451                 return ret;
 452
 453         ret = vmw_resource_val_add(sw_context, res, &node);
 454         if (unlikely(ret != 0))
 455                 return ret;
 456
 457         if (res_type == vmw_res_context && dev_priv->has_mob &&
 458             node->first_usage) {
 459
 460                 /*
 461                  * Put contexts first on the list to be able to exit
 462                  * list traversal for contexts early.
 463                  */
 464                 list_del(&node->head);
 465                 list_add(&node->head, &sw_context->resource_list);
 466
 467                 ret = vmw_resource_context_res_add(dev_priv, sw_context, res);
 468                 if (unlikely(ret != 0))
 469                         return ret;
 470                 node->staged_bindings =
 471                         kzalloc(sizeof(*node->staged_bindings), GFP_KERNEL);
 472                 if (node->staged_bindings == NULL) {
 473                         DRM_ERROR("Failed to allocate context binding "
 474                                   "information.\n");
 475                         return -ENOMEM;
 476                 }
 477                 INIT_LIST_HEAD(&node->staged_bindings->list);
 478         }
 479
 480         if (p_val)
 481                 *p_val = node;
 482
 483         return 0;
 484 }
 485
 486
 487 /**
 488  * vmw_cmd_res_check - Check that a resource is present and if so, put it
 489  * on the resource validate list unless it's already there.
 490  *
 491  * @dev_priv: Pointer to a device private structure.
 492  * @sw_context: Pointer to the software context.
 493  * @res_type: Resource type.
 494  * @converter: User-space visisble type specific information.
 495  * @id_loc: Pointer to the location in the command buffer currently being
 496  * parsed from where the user-space resource id handle is located.
 497  * @p_val: Pointer to pointer to resource validalidation node. Populated
 498  * on exit.
 499  */
 500 static int
 501 vmw_cmd_res_check(struct vmw_private *dev_priv,
 502                   struct vmw_sw_context *sw_context,
 503                   enum vmw_res_type res_type,
 504                   const struct vmw_user_resource_conv *converter,
 505                   uint32_t *id_loc,
 506                   struct vmw_resource_val_node **p_val)
 507 {
 508         struct vmw_res_cache_entry *rcache =
 509                 &sw_context->res_cache[res_type];
 510         struct vmw_resource *res;
 511         struct vmw_resource_val_node *node;
 512         int ret;
 513
 514         if (*id_loc == SVGA3D_INVALID_ID) {
 515                 if (p_val)
 516                         *p_val = NULL;
 517                 if (res_type == vmw_res_context) {
 518                         DRM_ERROR("Illegal context invalid id.\n");
 519                         return -EINVAL;
 520                 }
 521                 return 0;
 522         }
 523
 524         /*
 525          * Fastpath in case of repeated commands referencing the same
 526          * resource
 527          */
 528
 529         if (likely(rcache->valid && *id_loc == rcache->handle)) {
 530                 const struct vmw_resource *res = rcache->res;
 531
 532                 rcache->node->first_usage = false;
 533                 if (p_val)
 534                         *p_val = rcache->node;
 535
 536                 return vmw_resource_relocation_add
 537                         (&sw_context->res_relocations, res,
 538                          id_loc - sw_context->buf_start);
 539         }
 540
 541         ret = vmw_user_resource_lookup_handle(dev_priv,
 542                                               sw_context->fp->tfile,
 543                                               *id_loc,
 544                                               converter,
 545                                               &res);
 546         if (unlikely(ret != 0)) {
 547                 DRM_ERROR("Could not find or use resource 0x%08x.\n",
 548                           (unsigned) *id_loc);
 549                 dump_stack();
 550                 return ret;
 551         }
 552
 553         rcache->valid = true;
 554         rcache->res = res;
 555         rcache->handle = *id_loc;
 556
 557         ret = vmw_cmd_res_reloc_add(dev_priv, sw_context, res_type, id_loc,
 558                                     res, &node);
 559         if (unlikely(ret != 0))
 560                 goto out_no_reloc;
 561
 562         rcache->node = node;
 563         if (p_val)
 564                 *p_val = node;
 565         vmw_resource_unreference(&res);
 566         return 0;
 567
 568 out_no_reloc:
 569         BUG_ON(sw_context->error_resource != NULL);
 570         sw_context->error_resource = res;
 571
 572         return ret;
 573 }
 574
 575 /**
 576  * vmw_rebind_contexts - Rebind all resources previously bound to
 577  * referenced contexts.
 578  *
 579  * @sw_context: Pointer to the software context.
 580  *
 581  * Rebind context binding points that have been scrubbed because of eviction.
 582  */
 583 static int vmw_rebind_contexts(struct vmw_sw_context *sw_context)
 584 {
 585         struct vmw_resource_val_node *val;
 586         int ret;
 587
 588         list_for_each_entry(val, &sw_context->resource_list, head) {
 589                 if (unlikely(!val->staged_bindings))
 590                         break;
 591
 592                 ret = vmw_context_rebind_all(val->res);
 593                 if (unlikely(ret != 0)) {
 594                         if (ret != -ERESTARTSYS)
 595                                 DRM_ERROR("Failed to rebind context.\n");
 596                         return ret;
 597                 }
 598         }
 599
 600         return 0;
 601 }
 602
 603 /**
 604  * vmw_cmd_cid_check - Check a command header for valid context information.
 605  *
 606  * @dev_priv: Pointer to a device private structure.
 607  * @sw_context: Pointer to the software context.
 608  * @header: A command header with an embedded user-space context handle.
 609  *
 610  * Convenience function: Call vmw_cmd_res_check with the user-space context
 611  * handle embedded in @header.
 612  */
 613 static int vmw_cmd_cid_check(struct vmw_private *dev_priv,
 614                              struct vmw_sw_context *sw_context,
 615                              SVGA3dCmdHeader *header)
 616 {
 617         struct vmw_cid_cmd {
 618                 SVGA3dCmdHeader header;
 619                 uint32_t cid;
 620         } *cmd;
 621
 622         cmd = container_of(header, struct vmw_cid_cmd, header);
 623         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
 624                                  user_context_converter, &cmd->cid, NULL);
 625 }
 626
 627 static int vmw_cmd_set_render_target_check(struct vmw_private *dev_priv,
 628                                            struct vmw_sw_context *sw_context,
 629                                            SVGA3dCmdHeader *header)
 630 {
 631         struct vmw_sid_cmd {
 632                 SVGA3dCmdHeader header;
 633                 SVGA3dCmdSetRenderTarget body;
 634         } *cmd;
 635         struct vmw_resource_val_node *ctx_node;
 636         struct vmw_resource_val_node *res_node;
 637         int ret;
 638
 639         cmd = container_of(header, struct vmw_sid_cmd, header);
 640
 641         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
 642                                 user_context_converter, &cmd->body.cid,
 643                                 &ctx_node);
 644         if (unlikely(ret != 0))
 645                 return ret;
 646
 647         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 648                                 user_surface_converter,
 649                                 &cmd->body.target.sid, &res_node);
 650         if (unlikely(ret != 0))
 651                 return ret;
 652
 653         if (dev_priv->has_mob) {
 654                 struct vmw_ctx_bindinfo bi;
 655
 656                 bi.ctx = ctx_node->res;
 657                 bi.res = res_node ? res_node->res : NULL;
 658                 bi.bt = vmw_ctx_binding_rt;
 659                 bi.i1.rt_type = cmd->body.type;
 660                 return vmw_context_binding_add(ctx_node->staged_bindings, &bi);
 661         }
 662
 663         return 0;
 664 }
 665
 666 static int vmw_cmd_surface_copy_check(struct vmw_private *dev_priv,
 667                                       struct vmw_sw_context *sw_context,
 668                                       SVGA3dCmdHeader *header)
 669 {
 670         struct vmw_sid_cmd {
 671                 SVGA3dCmdHeader header;
 672                 SVGA3dCmdSurfaceCopy body;
 673         } *cmd;
 674         int ret;
 675
 676         cmd = container_of(header, struct vmw_sid_cmd, header);
 677         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 678                                 user_surface_converter,
 679                                 &cmd->body.src.sid, NULL);
 680         if (unlikely(ret != 0))
 681                 return ret;
 682
 683         if (sw_context->quirks & VMW_QUIRK_SCREENTARGET)
 684                 return 0;
 685
 686         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 687                                  user_surface_converter,
 688                                  &cmd->body.dest.sid, NULL);
 689 }
 690
 691 static int vmw_cmd_stretch_blt_check(struct vmw_private *dev_priv,
 692                                      struct vmw_sw_context *sw_context,
 693                                      SVGA3dCmdHeader *header)
 694 {
 695         struct vmw_sid_cmd {
 696                 SVGA3dCmdHeader header;
 697                 SVGA3dCmdSurfaceStretchBlt body;
 698         } *cmd;
 699         int ret;
 700
 701         cmd = container_of(header, struct vmw_sid_cmd, header);
 702         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 703                                 user_surface_converter,
 704                                 &cmd->body.src.sid, NULL);
 705         if (unlikely(ret != 0))
 706                 return ret;
 707         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 708                                  user_surface_converter,
 709                                  &cmd->body.dest.sid, NULL);
 710 }
 711
 712 static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv,
 713                                          struct vmw_sw_context *sw_context,
 714                                          SVGA3dCmdHeader *header)
 715 {
 716         struct vmw_sid_cmd {
 717                 SVGA3dCmdHeader header;
 718                 SVGA3dCmdBlitSurfaceToScreen body;
 719         } *cmd;
 720
 721         cmd = container_of(header, struct vmw_sid_cmd, header);
 722
 723         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 724                                  user_surface_converter,
 725                                  &cmd->body.srcImage.sid, NULL);
 726 }
 727
 728 static int vmw_cmd_present_check(struct vmw_private *dev_priv,
 729                                  struct vmw_sw_context *sw_context,
 730                                  SVGA3dCmdHeader *header)
 731 {
 732         struct vmw_sid_cmd {
 733                 SVGA3dCmdHeader header;
 734                 SVGA3dCmdPresent body;
 735         } *cmd;
 736
 737
 738         cmd = container_of(header, struct vmw_sid_cmd, header);
 739
 740         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 741                                  user_surface_converter, &cmd->body.sid,
 742                                  NULL);
 743 }
 744
 745 /**
 746  * vmw_query_bo_switch_prepare - Prepare to switch pinned buffer for queries.
 747  *
 748  * @dev_priv: The device private structure.
 749  * @new_query_bo: The new buffer holding query results.
 750  * @sw_context: The software context used for this command submission.
 751  *
 752  * This function checks whether @new_query_bo is suitable for holding
 753  * query results, and if another buffer currently is pinned for query
 754  * results. If so, the function prepares the state of @sw_context for
 755  * switching pinned buffers after successful submission of the current
 756  * command batch.
 757  */
 758 static int vmw_query_bo_switch_prepare(struct vmw_private *dev_priv,
 759                                        struct ttm_buffer_object *new_query_bo,
 760                                        struct vmw_sw_context *sw_context)
 761 {
 762         struct vmw_res_cache_entry *ctx_entry =
 763                 &sw_context->res_cache[vmw_res_context];
 764         int ret;
 765
 766         BUG_ON(!ctx_entry->valid);
 767         sw_context->last_query_ctx = ctx_entry->res;
 768
 769         if (unlikely(new_query_bo != sw_context->cur_query_bo)) {
 770
 771                 if (unlikely(new_query_bo->num_pages > 4)) {
 772                         DRM_ERROR("Query buffer too large.\n");
 773                         return -EINVAL;
 774                 }
 775
 776                 if (unlikely(sw_context->cur_query_bo != NULL)) {
 777                         sw_context->needs_post_query_barrier = true;
 778                         ret = vmw_bo_to_validate_list(sw_context,
 779                                                       sw_context->cur_query_bo,
 780                                                       dev_priv->has_mob, NULL);
 781                         if (unlikely(ret != 0))
 782                                 return ret;
 783                 }
 784                 sw_context->cur_query_bo = new_query_bo;
 785
 786                 ret = vmw_bo_to_validate_list(sw_context,
 787                                               dev_priv->dummy_query_bo,
 788                                               dev_priv->has_mob, NULL);
 789                 if (unlikely(ret != 0))
 790                         return ret;
 791
 792         }
 793
 794         return 0;
 795 }
 796
 797
 798 /**
 799  * vmw_query_bo_switch_commit - Finalize switching pinned query buffer
 800  *
 801  * @dev_priv: The device private structure.
 802  * @sw_context: The software context used for this command submission batch.
 803  *
 804  * This function will check if we're switching query buffers, and will then,
 805  * issue a dummy occlusion query wait used as a query barrier. When the fence
 806  * object following that query wait has signaled, we are sure that all
 807  * preceding queries have finished, and the old query buffer can be unpinned.
 808  * However, since both the new query buffer and the old one are fenced with
 809  * that fence, we can do an asynchronus unpin now, and be sure that the
 810  * old query buffer won't be moved until the fence has signaled.
 811  *
 812  * As mentioned above, both the new - and old query buffers need to be fenced
 813  * using a sequence emitted *after* calling this function.
 814  */
 815 static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv,
 816                                      struct vmw_sw_context *sw_context)
 817 {
 818         /*
 819          * The validate list should still hold references to all
 820          * contexts here.
 821          */
 822
 823         if (sw_context->needs_post_query_barrier) {
 824                 struct vmw_res_cache_entry *ctx_entry =
 825                         &sw_context->res_cache[vmw_res_context];
 826                 struct vmw_resource *ctx;
 827                 int ret;
 828
 829                 BUG_ON(!ctx_entry->valid);
 830                 ctx = ctx_entry->res;
 831
 832                 ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id);
 833
 834                 if (unlikely(ret != 0))
 835                         DRM_ERROR("Out of fifo space for dummy query.\n");
 836         }
 837
 838         if (dev_priv->pinned_bo != sw_context->cur_query_bo) {
 839                 if (dev_priv->pinned_bo) {
 840                         vmw_bo_pin(dev_priv->pinned_bo, false);
 841                         ttm_bo_unref(&dev_priv->pinned_bo);
 842                 }
 843
 844                 if (!sw_context->needs_post_query_barrier) {
 845                         vmw_bo_pin(sw_context->cur_query_bo, true);
 846
 847                         /*
 848                          * We pin also the dummy_query_bo buffer so that we
 849                          * don't need to validate it when emitting
 850                          * dummy queries in context destroy paths.
 851                          */
 852
 853                         vmw_bo_pin(dev_priv->dummy_query_bo, true);
 854                         dev_priv->dummy_query_bo_pinned = true;
 855
 856                         BUG_ON(sw_context->last_query_ctx == NULL);
 857                         dev_priv->query_cid = sw_context->last_query_ctx->id;
 858                         dev_priv->query_cid_valid = true;
 859                         dev_priv->pinned_bo =
 860                                 ttm_bo_reference(sw_context->cur_query_bo);
 861                 }
 862         }
 863 }
 864
 865 /**
 866  * vmw_translate_mob_pointer - Prepare to translate a user-space buffer
 867  * handle to a MOB id.
 868  *
 869  * @dev_priv: Pointer to a device private structure.
 870  * @sw_context: The software context used for this command batch validation.
 871  * @id: Pointer to the user-space handle to be translated.
 872  * @vmw_bo_p: Points to a location that, on successful return will carry
 873  * a reference-counted pointer to the DMA buffer identified by the
 874  * user-space handle in @id.
 875  *
 876  * This function saves information needed to translate a user-space buffer
 877  * handle to a MOB id. The translation does not take place immediately, but
 878  * during a call to vmw_apply_relocations(). This function builds a relocation
 879  * list and a list of buffers to validate. The former needs to be freed using
 880  * either vmw_apply_relocations() or vmw_free_relocations(). The latter
 881  * needs to be freed using vmw_clear_validations.
 882  */
 883 static int vmw_translate_mob_ptr(struct vmw_private *dev_priv,
 884                                  struct vmw_sw_context *sw_context,
 885                                  SVGAMobId *id,
 886                                  struct vmw_dma_buffer **vmw_bo_p)
 887 {
 888         struct vmw_dma_buffer *vmw_bo = NULL;
 889         struct ttm_buffer_object *bo;
 890         uint32_t handle = *id;
 891         struct vmw_relocation *reloc;
 892         int ret;
 893
 894         ret = vmw_user_dmabuf_lookup(sw_context->fp->tfile, handle, &vmw_bo);
 895         if (unlikely(ret != 0)) {
 896                 DRM_ERROR("Could not find or use MOB buffer.\n");
 897                 ret = -EINVAL;
 898                 goto out_no_reloc;
 899         }
 900         bo = &vmw_bo->base;
 901
 902         if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
 903                 DRM_ERROR("Max number relocations per submission"
 904                           " exceeded\n");
 905                 ret = -EINVAL;
 906                 goto out_no_reloc;
 907         }
 908
 909         reloc = &sw_context->relocs[sw_context->cur_reloc++];
 910         reloc->mob_loc = id;
 911         reloc->location = NULL;
 912
 913         ret = vmw_bo_to_validate_list(sw_context, bo, true, &reloc->index);
 914         if (unlikely(ret != 0))
 915                 goto out_no_reloc;
 916
 917         *vmw_bo_p = vmw_bo;
 918         return 0;
 919
 920 out_no_reloc:
 921         vmw_dmabuf_unreference(&vmw_bo);
 922         *vmw_bo_p = NULL;
 923         return ret;
 924 }
 925
 926 /**
 927  * vmw_translate_guest_pointer - Prepare to translate a user-space buffer
 928  * handle to a valid SVGAGuestPtr
 929  *
 930  * @dev_priv: Pointer to a device private structure.
 931  * @sw_context: The software context used for this command batch validation.
 932  * @ptr: Pointer to the user-space handle to be translated.
 933  * @vmw_bo_p: Points to a location that, on successful return will carry
 934  * a reference-counted pointer to the DMA buffer identified by the
 935  * user-space handle in @id.
 936  *
 937  * This function saves information needed to translate a user-space buffer
 938  * handle to a valid SVGAGuestPtr. The translation does not take place
 939  * immediately, but during a call to vmw_apply_relocations().
 940  * This function builds a relocation list and a list of buffers to validate.
 941  * The former needs to be freed using either vmw_apply_relocations() or
 942  * vmw_free_relocations(). The latter needs to be freed using
 943  * vmw_clear_validations.
 944  */
 945 static int vmw_translate_guest_ptr(struct vmw_private *dev_priv,
 946                                    struct vmw_sw_context *sw_context,
 947                                    SVGAGuestPtr *ptr,
 948                                    struct vmw_dma_buffer **vmw_bo_p)
 949 {
 950         struct vmw_dma_buffer *vmw_bo = NULL;
 951         struct ttm_buffer_object *bo;
 952         uint32_t handle = ptr->gmrId;
 953         struct vmw_relocation *reloc;
 954         int ret;
 955
 956         ret = vmw_user_dmabuf_lookup(sw_context->fp->tfile, handle, &vmw_bo);
 957         if (unlikely(ret != 0)) {
 958                 DRM_ERROR("Could not find or use GMR region.\n");
 959                 ret = -EINVAL;
 960                 goto out_no_reloc;
 961         }
 962         bo = &vmw_bo->base;
 963
 964         if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
 965                 DRM_ERROR("Max number relocations per submission"
 966                           " exceeded\n");
 967                 ret = -EINVAL;
 968                 goto out_no_reloc;
 969         }
 970
 971         reloc = &sw_context->relocs[sw_context->cur_reloc++];
 972         reloc->location = ptr;
 973
 974         ret = vmw_bo_to_validate_list(sw_context, bo, false, &reloc->index);
 975         if (unlikely(ret != 0))
 976                 goto out_no_reloc;
 977
 978         *vmw_bo_p = vmw_bo;
 979         return 0;
 980
 981 out_no_reloc:
 982         vmw_dmabuf_unreference(&vmw_bo);
 983         *vmw_bo_p = NULL;
 984         return ret;
 985 }
 986
 987 /**
 988  * vmw_cmd_begin_gb_query - validate a  SVGA_3D_CMD_BEGIN_GB_QUERY command.
 989  *
 990  * @dev_priv: Pointer to a device private struct.
 991  * @sw_context: The software context used for this command submission.
 992  * @header: Pointer to the command header in the command stream.
 993  */
 994 static int vmw_cmd_begin_gb_query(struct vmw_private *dev_priv,
 995                                   struct vmw_sw_context *sw_context,
 996                                   SVGA3dCmdHeader *header)
 997 {
 998         struct vmw_begin_gb_query_cmd {
 999                 SVGA3dCmdHeader header;
1000                 SVGA3dCmdBeginGBQuery q;
1001         } *cmd;
1002
1003         cmd = container_of(header, struct vmw_begin_gb_query_cmd,
1004                            header);
1005
1006         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1007                                  user_context_converter, &cmd->q.cid,
1008                                  NULL);
1009 }
1010
1011 /**
1012  * vmw_cmd_begin_query - validate a  SVGA_3D_CMD_BEGIN_QUERY command.
1013  *
1014  * @dev_priv: Pointer to a device private struct.
1015  * @sw_context: The software context used for this command submission.
1016  * @header: Pointer to the command header in the command stream.
1017  */
1018 static int vmw_cmd_begin_query(struct vmw_private *dev_priv,
1019                                struct vmw_sw_context *sw_context,
1020                                SVGA3dCmdHeader *header)
1021 {
1022         struct vmw_begin_query_cmd {
1023                 SVGA3dCmdHeader header;
1024                 SVGA3dCmdBeginQuery q;
1025         } *cmd;
1026
1027         cmd = container_of(header, struct vmw_begin_query_cmd,
1028                            header);
1029
1030         if (unlikely(dev_priv->has_mob)) {
1031                 struct {
1032                         SVGA3dCmdHeader header;
1033                         SVGA3dCmdBeginGBQuery q;
1034                 } gb_cmd;
1035
1036                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1037
1038                 gb_cmd.header.id = SVGA_3D_CMD_BEGIN_GB_QUERY;
1039                 gb_cmd.header.size = cmd->header.size;
1040                 gb_cmd.q.cid = cmd->q.cid;
1041                 gb_cmd.q.type = cmd->q.type;
1042
1043                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1044                 return vmw_cmd_begin_gb_query(dev_priv, sw_context, header);
1045         }
1046
1047         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1048                                  user_context_converter, &cmd->q.cid,
1049                                  NULL);
1050 }
1051
1052 /**
1053  * vmw_cmd_end_gb_query - validate a  SVGA_3D_CMD_END_GB_QUERY command.
1054  *
1055  * @dev_priv: Pointer to a device private struct.
1056  * @sw_context: The software context used for this command submission.
1057  * @header: Pointer to the command header in the command stream.
1058  */
1059 static int vmw_cmd_end_gb_query(struct vmw_private *dev_priv,
1060                                 struct vmw_sw_context *sw_context,
1061                                 SVGA3dCmdHeader *header)
1062 {
1063         struct vmw_dma_buffer *vmw_bo;
1064         struct vmw_query_cmd {
1065                 SVGA3dCmdHeader header;
1066                 SVGA3dCmdEndGBQuery q;
1067         } *cmd;
1068         int ret;
1069
1070         cmd = container_of(header, struct vmw_query_cmd, header);
1071         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1072         if (unlikely(ret != 0))
1073                 return ret;
1074
1075         ret = vmw_translate_mob_ptr(dev_priv, sw_context,
1076                                     &cmd->q.mobid,
1077                                     &vmw_bo);
1078         if (unlikely(ret != 0))
1079                 return ret;
1080
1081         ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context);
1082
1083         vmw_dmabuf_unreference(&vmw_bo);
1084         return ret;
1085 }
1086
1087 /**
1088  * vmw_cmd_end_query - validate a  SVGA_3D_CMD_END_QUERY command.
1089  *
1090  * @dev_priv: Pointer to a device private struct.
1091  * @sw_context: The software context used for this command submission.
1092  * @header: Pointer to the command header in the command stream.
1093  */
1094 static int vmw_cmd_end_query(struct vmw_private *dev_priv,
1095                              struct vmw_sw_context *sw_context,
1096                              SVGA3dCmdHeader *header)
1097 {
1098         struct vmw_dma_buffer *vmw_bo;
1099         struct vmw_query_cmd {
1100                 SVGA3dCmdHeader header;
1101                 SVGA3dCmdEndQuery q;
1102         } *cmd;
1103         int ret;
1104
1105         cmd = container_of(header, struct vmw_query_cmd, header);
1106         if (dev_priv->has_mob) {
1107                 struct {
1108                         SVGA3dCmdHeader header;
1109                         SVGA3dCmdEndGBQuery q;
1110                 } gb_cmd;
1111
1112                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1113
1114                 gb_cmd.header.id = SVGA_3D_CMD_END_GB_QUERY;
1115                 gb_cmd.header.size = cmd->header.size;
1116                 gb_cmd.q.cid = cmd->q.cid;
1117                 gb_cmd.q.type = cmd->q.type;
1118                 gb_cmd.q.mobid = cmd->q.guestResult.gmrId;
1119                 gb_cmd.q.offset = cmd->q.guestResult.offset;
1120
1121                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1122                 return vmw_cmd_end_gb_query(dev_priv, sw_context, header);
1123         }
1124
1125         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1126         if (unlikely(ret != 0))
1127                 return ret;
1128
1129         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1130                                       &cmd->q.guestResult,
1131                                       &vmw_bo);
1132         if (unlikely(ret != 0))
1133                 return ret;
1134
1135         ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context);
1136
1137         vmw_dmabuf_unreference(&vmw_bo);
1138         return ret;
1139 }
1140
1141 /**
1142  * vmw_cmd_wait_gb_query - validate a  SVGA_3D_CMD_WAIT_GB_QUERY command.
1143  *
1144  * @dev_priv: Pointer to a device private struct.
1145  * @sw_context: The software context used for this command submission.
1146  * @header: Pointer to the command header in the command stream.
1147  */
1148 static int vmw_cmd_wait_gb_query(struct vmw_private *dev_priv,
1149                                  struct vmw_sw_context *sw_context,
1150                                  SVGA3dCmdHeader *header)
1151 {
1152         struct vmw_dma_buffer *vmw_bo;
1153         struct vmw_query_cmd {
1154                 SVGA3dCmdHeader header;
1155                 SVGA3dCmdWaitForGBQuery q;
1156         } *cmd;
1157         int ret;
1158
1159         cmd = container_of(header, struct vmw_query_cmd, header);
1160         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1161         if (unlikely(ret != 0))
1162                 return ret;
1163
1164         ret = vmw_translate_mob_ptr(dev_priv, sw_context,
1165                                     &cmd->q.mobid,
1166                                     &vmw_bo);
1167         if (unlikely(ret != 0))
1168                 return ret;
1169
1170         vmw_dmabuf_unreference(&vmw_bo);
1171         return 0;
1172 }
1173
1174 /**
1175  * vmw_cmd_wait_query - validate a  SVGA_3D_CMD_WAIT_QUERY command.
1176  *
1177  * @dev_priv: Pointer to a device private struct.
1178  * @sw_context: The software context used for this command submission.
1179  * @header: Pointer to the command header in the command stream.
1180  */
1181 static int vmw_cmd_wait_query(struct vmw_private *dev_priv,
1182                               struct vmw_sw_context *sw_context,
1183                               SVGA3dCmdHeader *header)
1184 {
1185         struct vmw_dma_buffer *vmw_bo;
1186         struct vmw_query_cmd {
1187                 SVGA3dCmdHeader header;
1188                 SVGA3dCmdWaitForQuery q;
1189         } *cmd;
1190         int ret;
1191
1192         cmd = container_of(header, struct vmw_query_cmd, header);
1193         if (dev_priv->has_mob) {
1194                 struct {
1195                         SVGA3dCmdHeader header;
1196                         SVGA3dCmdWaitForGBQuery q;
1197                 } gb_cmd;
1198
1199                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1200
1201                 gb_cmd.header.id = SVGA_3D_CMD_WAIT_FOR_GB_QUERY;
1202                 gb_cmd.header.size = cmd->header.size;
1203                 gb_cmd.q.cid = cmd->q.cid;
1204                 gb_cmd.q.type = cmd->q.type;
1205                 gb_cmd.q.mobid = cmd->q.guestResult.gmrId;
1206                 gb_cmd.q.offset = cmd->q.guestResult.offset;
1207
1208                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1209                 return vmw_cmd_wait_gb_query(dev_priv, sw_context, header);
1210         }
1211
1212         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1213         if (unlikely(ret != 0))
1214                 return ret;
1215
1216         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1217                                       &cmd->q.guestResult,
1218                                       &vmw_bo);
1219         if (unlikely(ret != 0))
1220                 return ret;
1221
1222         vmw_dmabuf_unreference(&vmw_bo);
1223         return 0;
1224 }
1225
1226 static int vmw_cmd_dma(struct vmw_private *dev_priv,
1227                        struct vmw_sw_context *sw_context,
1228                        SVGA3dCmdHeader *header)
1229 {
1230         struct vmw_dma_buffer *vmw_bo = NULL;
1231         struct vmw_surface *srf = NULL;
1232         struct vmw_dma_cmd {
1233                 SVGA3dCmdHeader header;
1234                 SVGA3dCmdSurfaceDMA dma;
1235         } *cmd;
1236         int ret;
1237         SVGA3dCmdSurfaceDMASuffix *suffix;
1238         uint32_t bo_size;
1239
1240         cmd = container_of(header, struct vmw_dma_cmd, header);
1241         suffix = (SVGA3dCmdSurfaceDMASuffix *)((unsigned long) &cmd->dma +
1242                                                header->size - sizeof(*suffix));
1243
1244         /* Make sure device and verifier stays in sync. */
1245         if (unlikely(suffix->suffixSize != sizeof(*suffix))) {
1246                 DRM_ERROR("Invalid DMA suffix size.\n");
1247                 return -EINVAL;
1248         }
1249
1250         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1251                                       &cmd->dma.guest.ptr,
1252                                       &vmw_bo);
1253         if (unlikely(ret != 0))
1254                 return ret;
1255
1256         /* Make sure DMA doesn't cross BO boundaries. */
1257         bo_size = vmw_bo->base.num_pages * PAGE_SIZE;
1258         if (unlikely(cmd->dma.guest.ptr.offset > bo_size)) {
1259                 DRM_ERROR("Invalid DMA offset.\n");
1260                 return -EINVAL;
1261         }
1262
1263         bo_size -= cmd->dma.guest.ptr.offset;
1264         if (unlikely(suffix->maximumOffset > bo_size))
1265                 suffix->maximumOffset = bo_size;
1266
1267         if (sw_context->quirks & VMW_QUIRK_SCREENTARGET)
1268                 goto out_no_surface;
1269
1270         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1271                                 user_surface_converter, &cmd->dma.host.sid,
1272                                 NULL);
1273         if (unlikely(ret != 0)) {
1274                 if (unlikely(ret != -ERESTARTSYS))
1275                         DRM_ERROR("could not find surface for DMA.\n");
1276                 goto out_no_surface;
1277         }
1278
1279         srf = vmw_res_to_srf(sw_context->res_cache[vmw_res_surface].res);
1280
1281         vmw_kms_cursor_snoop(srf, sw_context->fp->tfile, &vmw_bo->base,
1282                              header);
1283
1284 out_no_surface:
1285         vmw_dmabuf_unreference(&vmw_bo);
1286         return ret;
1287 }
1288
1289 static int vmw_cmd_draw(struct vmw_private *dev_priv,
1290                         struct vmw_sw_context *sw_context,
1291                         SVGA3dCmdHeader *header)
1292 {
1293         struct vmw_draw_cmd {
1294                 SVGA3dCmdHeader header;
1295                 SVGA3dCmdDrawPrimitives body;
1296         } *cmd;
1297         SVGA3dVertexDecl *decl = (SVGA3dVertexDecl *)(
1298                 (unsigned long)header + sizeof(*cmd));
1299         SVGA3dPrimitiveRange *range;
1300         uint32_t i;
1301         uint32_t maxnum;
1302         int ret;
1303
1304         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1305         if (unlikely(ret != 0))
1306                 return ret;
1307
1308         cmd = container_of(header, struct vmw_draw_cmd, header);
1309         maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);
1310
1311         if (unlikely(cmd->body.numVertexDecls > maxnum)) {
1312                 DRM_ERROR("Illegal number of vertex declarations.\n");
1313                 return -EINVAL;
1314         }
1315
1316         for (i = 0; i < cmd->body.numVertexDecls; ++i, ++decl) {
1317                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1318                                         user_surface_converter,
1319                                         &decl->array.surfaceId, NULL);
1320                 if (unlikely(ret != 0))
1321                         return ret;
1322         }
1323
1324         maxnum = (header->size - sizeof(cmd->body) -
1325                   cmd->body.numVertexDecls * sizeof(*decl)) / sizeof(*range);
1326         if (unlikely(cmd->body.numRanges > maxnum)) {
1327                 DRM_ERROR("Illegal number of index ranges.\n");
1328                 return -EINVAL;
1329         }
1330
1331         range = (SVGA3dPrimitiveRange *) decl;
1332         for (i = 0; i < cmd->body.numRanges; ++i, ++range) {
1333                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1334                                         user_surface_converter,
1335                                         &range->indexArray.surfaceId, NULL);
1336                 if (unlikely(ret != 0))
1337                         return ret;
1338         }
1339         return 0;
1340 }
1341
1342
1343 static int vmw_cmd_tex_state(struct vmw_private *dev_priv,
1344                              struct vmw_sw_context *sw_context,
1345                              SVGA3dCmdHeader *header)
1346 {
1347         struct vmw_tex_state_cmd {
1348                 SVGA3dCmdHeader header;
1349                 SVGA3dCmdSetTextureState state;
1350         } *cmd;
1351
1352         SVGA3dTextureState *last_state = (SVGA3dTextureState *)
1353           ((unsigned long) header + header->size + sizeof(header));
1354         SVGA3dTextureState *cur_state = (SVGA3dTextureState *)
1355                 ((unsigned long) header + sizeof(struct vmw_tex_state_cmd));
1356         struct vmw_resource_val_node *ctx_node;
1357         struct vmw_resource_val_node *res_node;
1358         int ret;
1359
1360         cmd = container_of(header, struct vmw_tex_state_cmd,
1361                            header);
1362
1363         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1364                                 user_context_converter, &cmd->state.cid,
1365                                 &ctx_node);
1366         if (unlikely(ret != 0))
1367                 return ret;
1368
1369         for (; cur_state < last_state; ++cur_state) {
1370                 if (likely(cur_state->name != SVGA3D_TS_BIND_TEXTURE))
1371                         continue;
1372
1373                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1374                                         user_surface_converter,
1375                                         &cur_state->value, &res_node);
1376                 if (unlikely(ret != 0))
1377                         return ret;
1378
1379                 if (dev_priv->has_mob) {
1380                         struct vmw_ctx_bindinfo bi;
1381
1382                         bi.ctx = ctx_node->res;
1383                         bi.res = res_node ? res_node->res : NULL;
1384                         bi.bt = vmw_ctx_binding_tex;
1385                         bi.i1.texture_stage = cur_state->stage;
1386                         vmw_context_binding_add(ctx_node->staged_bindings,
1387                                                 &bi);
1388                 }
1389         }
1390
1391         return 0;
1392 }
1393
1394 static int vmw_cmd_check_define_gmrfb(struct vmw_private *dev_priv,
1395                                       struct vmw_sw_context *sw_context,
1396                                       void *buf)
1397 {
1398         struct vmw_dma_buffer *vmw_bo;
1399         int ret;
1400
1401         struct {
1402                 uint32_t header;
1403                 SVGAFifoCmdDefineGMRFB body;
1404         } *cmd = buf;
1405
1406         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1407                                       &cmd->body.ptr,
1408                                       &vmw_bo);
1409         if (unlikely(ret != 0))
1410                 return ret;
1411
1412         vmw_dmabuf_unreference(&vmw_bo);
1413
1414         return ret;
1415 }
1416
1417 /**
1418  * vmw_cmd_switch_backup - Utility function to handle backup buffer switching
1419  *
1420  * @dev_priv: Pointer to a device private struct.
1421  * @sw_context: The software context being used for this batch.
1422  * @res_type: The resource type.
1423  * @converter: Information about user-space binding for this resource type.
1424  * @res_id: Pointer to the user-space resource handle in the command stream.
1425  * @buf_id: Pointer to the user-space backup buffer handle in the command
1426  * stream.
1427  * @backup_offset: Offset of backup into MOB.
1428  *
1429  * This function prepares for registering a switch of backup buffers
1430  * in the resource metadata just prior to unreserving.
1431  */
1432 static int vmw_cmd_switch_backup(struct vmw_private *dev_priv,
1433                                  struct vmw_sw_context *sw_context,
1434                                  enum vmw_res_type res_type,
1435                                  const struct vmw_user_resource_conv
1436                                  *converter,
1437                                  uint32_t *res_id,
1438                                  uint32_t *buf_id,
1439                                  unsigned long backup_offset)
1440 {
1441         int ret;
1442         struct vmw_dma_buffer *dma_buf;
1443         struct vmw_resource_val_node *val_node;
1444
1445         ret = vmw_cmd_res_check(dev_priv, sw_context, res_type,
1446                                 converter, res_id, &val_node);
1447         if (unlikely(ret != 0))
1448                 return ret;
1449
1450         ret = vmw_translate_mob_ptr(dev_priv, sw_context, buf_id, &dma_buf);
1451         if (unlikely(ret != 0))
1452                 return ret;
1453
1454         if (val_node->first_usage)
1455                 val_node->no_buffer_needed = true;
1456
1457         vmw_dmabuf_unreference(&val_node->new_backup);
1458         val_node->new_backup = dma_buf;
1459         val_node->new_backup_offset = backup_offset;
1460
1461         return 0;
1462 }
1463
1464 /**
1465  * vmw_cmd_bind_gb_surface - Validate an SVGA_3D_CMD_BIND_GB_SURFACE
1466  * command
1467  *
1468  * @dev_priv: Pointer to a device private struct.
1469  * @sw_context: The software context being used for this batch.
1470  * @header: Pointer to the command header in the command stream.
1471  */
1472 static int vmw_cmd_bind_gb_surface(struct vmw_private *dev_priv,
1473                                    struct vmw_sw_context *sw_context,
1474                                    SVGA3dCmdHeader *header)
1475 {
1476         struct vmw_bind_gb_surface_cmd {
1477                 SVGA3dCmdHeader header;
1478                 SVGA3dCmdBindGBSurface body;
1479         } *cmd;
1480
1481         cmd = container_of(header, struct vmw_bind_gb_surface_cmd, header);
1482
1483         return vmw_cmd_switch_backup(dev_priv, sw_context, vmw_res_surface,
1484                                      user_surface_converter,
1485                                      &cmd->body.sid, &cmd->body.mobid,
1486                                      0);
1487 }
1488
1489 /**
1490  * vmw_cmd_update_gb_image - Validate an SVGA_3D_CMD_UPDATE_GB_IMAGE
1491  * command
1492  *
1493  * @dev_priv: Pointer to a device private struct.
1494  * @sw_context: The software context being used for this batch.
1495  * @header: Pointer to the command header in the command stream.
1496  */
1497 static int vmw_cmd_update_gb_image(struct vmw_private *dev_priv,
1498                                    struct vmw_sw_context *sw_context,
1499                                    SVGA3dCmdHeader *header)
1500 {
1501         struct vmw_gb_surface_cmd {
1502                 SVGA3dCmdHeader header;
1503                 SVGA3dCmdUpdateGBImage body;
1504         } *cmd;
1505
1506         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1507
1508         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1509                                  user_surface_converter,
1510                                  &cmd->body.image.sid, NULL);
1511 }
1512
1513 /**
1514  * vmw_cmd_update_gb_surface - Validate an SVGA_3D_CMD_UPDATE_GB_SURFACE
1515  * command
1516  *
1517  * @dev_priv: Pointer to a device private struct.
1518  * @sw_context: The software context being used for this batch.
1519  * @header: Pointer to the command header in the command stream.
1520  */
1521 static int vmw_cmd_update_gb_surface(struct vmw_private *dev_priv,
1522                                      struct vmw_sw_context *sw_context,
1523                                      SVGA3dCmdHeader *header)
1524 {
1525         struct vmw_gb_surface_cmd {
1526                 SVGA3dCmdHeader header;
1527                 SVGA3dCmdUpdateGBSurface body;
1528         } *cmd;
1529
1530         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1531
1532         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1533                                  user_surface_converter,
1534                                  &cmd->body.sid, NULL);
1535 }
1536
1537 /**
1538  * vmw_cmd_readback_gb_image - Validate an SVGA_3D_CMD_READBACK_GB_IMAGE
1539  * command
1540  *
1541  * @dev_priv: Pointer to a device private struct.
1542  * @sw_context: The software context being used for this batch.
1543  * @header: Pointer to the command header in the command stream.
1544  */
1545 static int vmw_cmd_readback_gb_image(struct vmw_private *dev_priv,
1546                                      struct vmw_sw_context *sw_context,
1547                                      SVGA3dCmdHeader *header)
1548 {
1549         struct vmw_gb_surface_cmd {
1550                 SVGA3dCmdHeader header;
1551                 SVGA3dCmdReadbackGBImage body;
1552         } *cmd;
1553
1554         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1555
1556         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1557                                  user_surface_converter,
1558                                  &cmd->body.image.sid, NULL);
1559 }
1560
1561 /**
1562  * vmw_cmd_readback_gb_surface - Validate an SVGA_3D_CMD_READBACK_GB_SURFACE
1563  * command
1564  *
1565  * @dev_priv: Pointer to a device private struct.
1566  * @sw_context: The software context being used for this batch.
1567  * @header: Pointer to the command header in the command stream.
1568  */
1569 static int vmw_cmd_readback_gb_surface(struct vmw_private *dev_priv,
1570                                        struct vmw_sw_context *sw_context,
1571                                        SVGA3dCmdHeader *header)
1572 {
1573         struct vmw_gb_surface_cmd {
1574                 SVGA3dCmdHeader header;
1575                 SVGA3dCmdReadbackGBSurface body;
1576         } *cmd;
1577
1578         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1579
1580         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1581                                  user_surface_converter,
1582                                  &cmd->body.sid, NULL);
1583 }
1584
1585 /**
1586  * vmw_cmd_invalidate_gb_image - Validate an SVGA_3D_CMD_INVALIDATE_GB_IMAGE
1587  * command
1588  *
1589  * @dev_priv: Pointer to a device private struct.
1590  * @sw_context: The software context being used for this batch.
1591  * @header: Pointer to the command header in the command stream.
1592  */
1593 static int vmw_cmd_invalidate_gb_image(struct vmw_private *dev_priv,
1594                                        struct vmw_sw_context *sw_context,
1595                                        SVGA3dCmdHeader *header)
1596 {
1597         struct vmw_gb_surface_cmd {
1598                 SVGA3dCmdHeader header;
1599                 SVGA3dCmdInvalidateGBImage body;
1600         } *cmd;
1601
1602         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1603
1604         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1605                                  user_surface_converter,
1606                                  &cmd->body.image.sid, NULL);
1607 }
1608
1609 /**
1610  * vmw_cmd_invalidate_gb_surface - Validate an
1611  * SVGA_3D_CMD_INVALIDATE_GB_SURFACE command
1612  *
1613  * @dev_priv: Pointer to a device private struct.
1614  * @sw_context: The software context being used for this batch.
1615  * @header: Pointer to the command header in the command stream.
1616  */
1617 static int vmw_cmd_invalidate_gb_surface(struct vmw_private *dev_priv,
1618                                          struct vmw_sw_context *sw_context,
1619                                          SVGA3dCmdHeader *header)
1620 {
1621         struct vmw_gb_surface_cmd {
1622                 SVGA3dCmdHeader header;
1623                 SVGA3dCmdInvalidateGBSurface body;
1624         } *cmd;
1625
1626         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1627
1628         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1629                                  user_surface_converter,
1630                                  &cmd->body.sid, NULL);
1631 }
1632
1633
1634 /**
1635  * vmw_cmd_shader_define - Validate an SVGA_3D_CMD_SHADER_DEFINE
1636  * command
1637  *
1638  * @dev_priv: Pointer to a device private struct.
1639  * @sw_context: The software context being used for this batch.
1640  * @header: Pointer to the command header in the command stream.
1641  */
1642 static int vmw_cmd_shader_define(struct vmw_private *dev_priv,
1643                                  struct vmw_sw_context *sw_context,
1644                                  SVGA3dCmdHeader *header)
1645 {
1646         struct vmw_shader_define_cmd {
1647                 SVGA3dCmdHeader header;
1648                 SVGA3dCmdDefineShader body;
1649         } *cmd;
1650         int ret;
1651         size_t size;
1652         struct vmw_resource_val_node *val;
1653
1654         cmd = container_of(header, struct vmw_shader_define_cmd,
1655                            header);
1656
1657         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1658                                 user_context_converter, &cmd->body.cid,
1659                                 &val);
1660         if (unlikely(ret != 0))
1661                 return ret;
1662
1663         if (unlikely(!dev_priv->has_mob))
1664                 return 0;
1665
1666         size = cmd->header.size - sizeof(cmd->body);
1667         ret = vmw_compat_shader_add(dev_priv,
1668                                     vmw_context_res_man(val->res),
1669                                     cmd->body.shid, cmd + 1,
1670                                     cmd->body.type, size,
1671                                     &sw_context->staged_cmd_res);
1672         if (unlikely(ret != 0))
1673                 return ret;
1674
1675         return vmw_resource_relocation_add(&sw_context->res_relocations,
1676                                            NULL, &cmd->header.id -
1677                                            sw_context->buf_start);
1678
1679         return 0;
1680 }
1681
1682 /**
1683  * vmw_cmd_shader_destroy - Validate an SVGA_3D_CMD_SHADER_DESTROY
1684  * command
1685  *
1686  * @dev_priv: Pointer to a device private struct.
1687  * @sw_context: The software context being used for this batch.
1688  * @header: Pointer to the command header in the command stream.
1689  */
1690 static int vmw_cmd_shader_destroy(struct vmw_private *dev_priv,
1691                                   struct vmw_sw_context *sw_context,
1692                                   SVGA3dCmdHeader *header)
1693 {
1694         struct vmw_shader_destroy_cmd {
1695                 SVGA3dCmdHeader header;
1696                 SVGA3dCmdDestroyShader body;
1697         } *cmd;
1698         int ret;
1699         struct vmw_resource_val_node *val;
1700
1701         cmd = container_of(header, struct vmw_shader_destroy_cmd,
1702                            header);
1703
1704         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1705                                 user_context_converter, &cmd->body.cid,
1706                                 &val);
1707         if (unlikely(ret != 0))
1708                 return ret;
1709
1710         if (unlikely(!dev_priv->has_mob))
1711                 return 0;
1712
1713         ret = vmw_compat_shader_remove(vmw_context_res_man(val->res),
1714                                        cmd->body.shid,
1715                                        cmd->body.type,
1716                                        &sw_context->staged_cmd_res);
1717         if (unlikely(ret != 0))
1718                 return ret;
1719
1720         return vmw_resource_relocation_add(&sw_context->res_relocations,
1721                                            NULL, &cmd->header.id -
1722                                            sw_context->buf_start);
1723
1724         return 0;
1725 }
1726
1727 /**
1728  * vmw_cmd_set_shader - Validate an SVGA_3D_CMD_SET_SHADER
1729  * command
1730  *
1731  * @dev_priv: Pointer to a device private struct.
1732  * @sw_context: The software context being used for this batch.
1733  * @header: Pointer to the command header in the command stream.
1734  */
1735 static int vmw_cmd_set_shader(struct vmw_private *dev_priv,
1736                               struct vmw_sw_context *sw_context,
1737                               SVGA3dCmdHeader *header)
1738 {
1739         struct vmw_set_shader_cmd {
1740                 SVGA3dCmdHeader header;
1741                 SVGA3dCmdSetShader body;
1742         } *cmd;
1743         struct vmw_resource_val_node *ctx_node, *res_node = NULL;
1744         struct vmw_ctx_bindinfo bi;
1745         struct vmw_resource *res = NULL;
1746         int ret;
1747
1748         cmd = container_of(header, struct vmw_set_shader_cmd,
1749                            header);
1750
1751         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1752                                 user_context_converter, &cmd->body.cid,
1753                                 &ctx_node);
1754         if (unlikely(ret != 0))
1755                 return ret;
1756
1757         if (!dev_priv->has_mob)
1758                 return 0;
1759
1760         if (cmd->body.shid != SVGA3D_INVALID_ID) {
1761                 res = vmw_compat_shader_lookup
1762                         (vmw_context_res_man(ctx_node->res),
1763                          cmd->body.shid,
1764                          cmd->body.type);
1765
1766                 if (!IS_ERR(res)) {
1767                         ret = vmw_cmd_res_reloc_add(dev_priv, sw_context,
1768                                                     vmw_res_shader,
1769                                                     &cmd->body.shid, res,
1770                                                     &res_node);
1771                         vmw_resource_unreference(&res);
1772                         if (unlikely(ret != 0))
1773                                 return ret;
1774                 }
1775         }
1776
1777         if (!res_node) {
1778                 ret = vmw_cmd_res_check(dev_priv, sw_context,
1779                                         vmw_res_shader,
1780                                         user_shader_converter,
1781                                         &cmd->body.shid, &res_node);
1782                 if (unlikely(ret != 0))
1783                         return ret;
1784         }
1785
1786         bi.ctx = ctx_node->res;
1787         bi.res = res_node ? res_node->res : NULL;
1788         bi.bt = vmw_ctx_binding_shader;
1789         bi.i1.shader_type = cmd->body.type;
1790         return vmw_context_binding_add(ctx_node->staged_bindings, &bi);
1791 }
1792
1793 /**
1794  * vmw_cmd_set_shader_const - Validate an SVGA_3D_CMD_SET_SHADER_CONST
1795  * command
1796  *
1797  * @dev_priv: Pointer to a device private struct.
1798  * @sw_context: The software context being used for this batch.
1799  * @header: Pointer to the command header in the command stream.
1800  */
1801 static int vmw_cmd_set_shader_const(struct vmw_private *dev_priv,
1802                                     struct vmw_sw_context *sw_context,
1803                                     SVGA3dCmdHeader *header)
1804 {
1805         struct vmw_set_shader_const_cmd {
1806                 SVGA3dCmdHeader header;
1807                 SVGA3dCmdSetShaderConst body;
1808         } *cmd;
1809         int ret;
1810
1811         cmd = container_of(header, struct vmw_set_shader_const_cmd,
1812                            header);
1813
1814         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1815                                 user_context_converter, &cmd->body.cid,
1816                                 NULL);
1817         if (unlikely(ret != 0))
1818                 return ret;
1819
1820         if (dev_priv->has_mob)
1821                 header->id = SVGA_3D_CMD_SET_GB_SHADERCONSTS_INLINE;
1822
1823         return 0;
1824 }
1825
1826 /**
1827  * vmw_cmd_bind_gb_shader - Validate an SVGA_3D_CMD_BIND_GB_SHADER
1828  * command
1829  *
1830  * @dev_priv: Pointer to a device private struct.
1831  * @sw_context: The software context being used for this batch.
1832  * @header: Pointer to the command header in the command stream.
1833  */
1834 static int vmw_cmd_bind_gb_shader(struct vmw_private *dev_priv,
1835                                   struct vmw_sw_context *sw_context,
1836                                   SVGA3dCmdHeader *header)
1837 {
1838         struct vmw_bind_gb_shader_cmd {
1839                 SVGA3dCmdHeader header;
1840                 SVGA3dCmdBindGBShader body;
1841         } *cmd;
1842
1843         cmd = container_of(header, struct vmw_bind_gb_shader_cmd,
1844                            header);
1845
1846         return vmw_cmd_switch_backup(dev_priv, sw_context, vmw_res_shader,
1847                                      user_shader_converter,
1848                                      &cmd->body.shid, &cmd->body.mobid,
1849                                      cmd->body.offsetInBytes);
1850 }
1851
1852 static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv,
1853                                 struct vmw_sw_context *sw_context,
1854                                 void *buf, uint32_t *size)
1855 {
1856         uint32_t size_remaining = *size;
1857         uint32_t cmd_id;
1858
1859         cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
1860         switch (cmd_id) {
1861         case SVGA_CMD_UPDATE:
1862                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdUpdate);
1863                 break;
1864         case SVGA_CMD_DEFINE_GMRFB:
1865                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdDefineGMRFB);
1866                 break;
1867         case SVGA_CMD_BLIT_GMRFB_TO_SCREEN:
1868                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
1869                 break;
1870         case SVGA_CMD_BLIT_SCREEN_TO_GMRFB:
1871                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
1872                 break;
1873         default:
1874                 DRM_ERROR("Unsupported SVGA command: %u.\n", cmd_id);
1875                 return -EINVAL;
1876         }
1877
1878         if (*size > size_remaining) {
1879                 DRM_ERROR("Invalid SVGA command (size mismatch):"
1880                           " %u.\n", cmd_id);
1881                 return -EINVAL;
1882         }
1883
1884         if (unlikely(!sw_context->kernel)) {
1885                 DRM_ERROR("Kernel only SVGA command: %u.\n", cmd_id);
1886                 return -EPERM;
1887         }
1888
1889         if (cmd_id == SVGA_CMD_DEFINE_GMRFB)
1890                 return vmw_cmd_check_define_gmrfb(dev_priv, sw_context, buf);
1891
1892         return 0;
1893 }
1894
1895 static const struct vmw_cmd_entry vmw_cmd_entries[SVGA_3D_CMD_MAX] = {
1896         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE, &vmw_cmd_invalid,
1897                     false, false, false),
1898         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DESTROY, &vmw_cmd_invalid,
1899                     false, false, false),
1900         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_COPY, &vmw_cmd_surface_copy_check,
1901                     true, false, false),
1902         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_STRETCHBLT, &vmw_cmd_stretch_blt_check,
1903                     true, false, false),
1904         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DMA, &vmw_cmd_dma,
1905                     true, false, false),
1906         VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DEFINE, &vmw_cmd_invalid,
1907                     false, false, false),
1908         VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DESTROY, &vmw_cmd_invalid,
1909                     false, false, false),
1910         VMW_CMD_DEF(SVGA_3D_CMD_SETTRANSFORM, &vmw_cmd_cid_check,
1911                     true, false, false),
1912         VMW_CMD_DEF(SVGA_3D_CMD_SETZRANGE, &vmw_cmd_cid_check,
1913                     true, false, false),
1914         VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERSTATE, &vmw_cmd_cid_check,
1915                     true, false, false),
1916         VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERTARGET,
1917                     &vmw_cmd_set_render_target_check, true, false, false),
1918         VMW_CMD_DEF(SVGA_3D_CMD_SETTEXTURESTATE, &vmw_cmd_tex_state,
1919                     true, false, false),
1920         VMW_CMD_DEF(SVGA_3D_CMD_SETMATERIAL, &vmw_cmd_cid_check,
1921                     true, false, false),
1922         VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTDATA, &vmw_cmd_cid_check,
1923                     true, false, false),
1924         VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTENABLED, &vmw_cmd_cid_check,
1925                     true, false, false),
1926         VMW_CMD_DEF(SVGA_3D_CMD_SETVIEWPORT, &vmw_cmd_cid_check,
1927                     true, false, false),
1928         VMW_CMD_DEF(SVGA_3D_CMD_SETCLIPPLANE, &vmw_cmd_cid_check,
1929                     true, false, false),
1930         VMW_CMD_DEF(SVGA_3D_CMD_CLEAR, &vmw_cmd_cid_check,
1931                     true, false, false),
1932         VMW_CMD_DEF(SVGA_3D_CMD_PRESENT, &vmw_cmd_present_check,
1933                     false, false, false),
1934         VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DEFINE, &vmw_cmd_shader_define,
1935                     true, false, false),
1936         VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DESTROY, &vmw_cmd_shader_destroy,
1937                     true, false, false),
1938         VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER, &vmw_cmd_set_shader,
1939                     true, false, false),
1940         VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER_CONST, &vmw_cmd_set_shader_const,
1941                     true, false, false),
1942         VMW_CMD_DEF(SVGA_3D_CMD_DRAW_PRIMITIVES, &vmw_cmd_draw,
1943                     true, false, false),
1944         VMW_CMD_DEF(SVGA_3D_CMD_SETSCISSORRECT, &vmw_cmd_cid_check,
1945                     true, false, false),
1946         VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_QUERY, &vmw_cmd_begin_query,
1947                     true, false, false),
1948         VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_end_query,
1949                     true, false, false),
1950         VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_wait_query,
1951                     true, false, false),
1952         VMW_CMD_DEF(SVGA_3D_CMD_PRESENT_READBACK, &vmw_cmd_ok,
1953                     true, false, false),
1954         VMW_CMD_DEF(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN,
1955                     &vmw_cmd_blt_surf_screen_check, false, false, false),
1956         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE_V2, &vmw_cmd_invalid,
1957                     false, false, false),
1958         VMW_CMD_DEF(SVGA_3D_CMD_GENERATE_MIPMAPS, &vmw_cmd_invalid,
1959                     false, false, false),
1960         VMW_CMD_DEF(SVGA_3D_CMD_ACTIVATE_SURFACE, &vmw_cmd_invalid,
1961                     false, false, false),
1962         VMW_CMD_DEF(SVGA_3D_CMD_DEACTIVATE_SURFACE, &vmw_cmd_invalid,
1963                     false, false, false),
1964         VMW_CMD_DEF(SVGA_3D_CMD_SCREEN_DMA, &vmw_cmd_invalid,
1965                     false, false, false),
1966         VMW_CMD_DEF(SVGA_3D_CMD_SET_UNITY_SURFACE_COOKIE, &vmw_cmd_invalid,
1967                     false, false, false),
1968         VMW_CMD_DEF(SVGA_3D_CMD_OPEN_CONTEXT_SURFACE, &vmw_cmd_invalid,
1969                     false, false, false),
1970         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_BITBLT, &vmw_cmd_invalid,
1971                     false, false, false),
1972         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_TRANSBLT, &vmw_cmd_invalid,
1973                     false, false, false),
1974         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_STRETCHBLT, &vmw_cmd_invalid,
1975                     false, false, false),
1976         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_COLORFILL, &vmw_cmd_invalid,
1977                     false, false, false),
1978         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_ALPHABLEND, &vmw_cmd_invalid,
1979                     false, false, false),
1980         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_CLEARTYPEBLEND, &vmw_cmd_invalid,
1981                     false, false, false),
1982         VMW_CMD_DEF(SVGA_3D_CMD_SET_OTABLE_BASE, &vmw_cmd_invalid,
1983                     false, false, true),
1984         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_OTABLE, &vmw_cmd_invalid,
1985                     false, false, true),
1986         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_MOB, &vmw_cmd_invalid,
1987                     false, false, true),
1988         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_MOB, &vmw_cmd_invalid,
1989                     false, false, true),
1990         VMW_CMD_DEF(SVGA_3D_CMD_REDEFINE_GB_MOB, &vmw_cmd_invalid,
1991                     false, false, true),
1992         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_MOB_MAPPING, &vmw_cmd_invalid,
1993                     false, false, true),
1994         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SURFACE, &vmw_cmd_invalid,
1995                     false, false, true),
1996         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SURFACE, &vmw_cmd_invalid,
1997                     false, false, true),
1998         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SURFACE, &vmw_cmd_bind_gb_surface,
1999                     true, false, true),
2000         VMW_CMD_DEF(SVGA_3D_CMD_COND_BIND_GB_SURFACE, &vmw_cmd_invalid,
2001                     false, false, true),
2002         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_IMAGE, &vmw_cmd_update_gb_image,
2003                     true, false, true),
2004         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_SURFACE,
2005                     &vmw_cmd_update_gb_surface, true, false, true),
2006         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_IMAGE,
2007                     &vmw_cmd_readback_gb_image, true, false, true),
2008         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_SURFACE,
2009                     &vmw_cmd_readback_gb_surface, true, false, true),
2010         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_IMAGE,
2011                     &vmw_cmd_invalidate_gb_image, true, false, true),
2012         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_SURFACE,
2013                     &vmw_cmd_invalidate_gb_surface, true, false, true),
2014         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_CONTEXT, &vmw_cmd_invalid,
2015                     false, false, true),
2016         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_CONTEXT, &vmw_cmd_invalid,
2017                     false, false, true),
2018         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_CONTEXT, &vmw_cmd_invalid,
2019                     false, false, true),
2020         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_CONTEXT, &vmw_cmd_invalid,
2021                     false, false, true),
2022         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_CONTEXT, &vmw_cmd_invalid,
2023                     false, false, true),
2024         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SHADER, &vmw_cmd_invalid,
2025                     false, false, true),
2026         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SHADER, &vmw_cmd_bind_gb_shader,
2027                     true, false, true),
2028         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SHADER, &vmw_cmd_invalid,
2029                     false, false, true),
2030         VMW_CMD_DEF(SVGA_3D_CMD_SET_OTABLE_BASE64, &vmw_cmd_invalid,
2031                     false, false, false),
2032         VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_GB_QUERY, &vmw_cmd_begin_gb_query,
2033                     true, false, true),
2034         VMW_CMD_DEF(SVGA_3D_CMD_END_GB_QUERY, &vmw_cmd_end_gb_query,
2035                     true, false, true),
2036         VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_GB_QUERY, &vmw_cmd_wait_gb_query,
2037                     true, false, true),
2038         VMW_CMD_DEF(SVGA_3D_CMD_NOP, &vmw_cmd_ok,
2039                     true, false, true),
2040         VMW_CMD_DEF(SVGA_3D_CMD_ENABLE_GART, &vmw_cmd_invalid,
2041                     false, false, true),
2042         VMW_CMD_DEF(SVGA_3D_CMD_DISABLE_GART, &vmw_cmd_invalid,
2043                     false, false, true),
2044         VMW_CMD_DEF(SVGA_3D_CMD_MAP_MOB_INTO_GART, &vmw_cmd_invalid,
2045                     false, false, true),
2046         VMW_CMD_DEF(SVGA_3D_CMD_UNMAP_GART_RANGE, &vmw_cmd_invalid,
2047                     false, false, true),
2048         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SCREENTARGET, &vmw_cmd_invalid,
2049                     false, false, true),
2050         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SCREENTARGET, &vmw_cmd_invalid,
2051                     false, false, true),
2052         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SCREENTARGET, &vmw_cmd_invalid,
2053                     false, false, true),
2054         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_SCREENTARGET, &vmw_cmd_invalid,
2055                     false, false, true),
2056         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_IMAGE_PARTIAL, &vmw_cmd_invalid,
2057                     false, false, true),
2058         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_IMAGE_PARTIAL, &vmw_cmd_invalid,
2059                     false, false, true),
2060         VMW_CMD_DEF(SVGA_3D_CMD_SET_GB_SHADERCONSTS_INLINE, &vmw_cmd_cid_check,
2061                     true, false, true)
2062 };
2063
2064 static int vmw_cmd_check(struct vmw_private *dev_priv,
2065                          struct vmw_sw_context *sw_context,
2066                          void *buf, uint32_t *size)
2067 {
2068         uint32_t cmd_id;
2069         uint32_t size_remaining = *size;
2070         SVGA3dCmdHeader *header = (SVGA3dCmdHeader *) buf;
2071         int ret;
2072         const struct vmw_cmd_entry *entry;
2073         bool gb = dev_priv->capabilities & SVGA_CAP_GBOBJECTS;
2074
2075         cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
2076         /* Handle any none 3D commands */
2077         if (unlikely(cmd_id < SVGA_CMD_MAX))
2078                 return vmw_cmd_check_not_3d(dev_priv, sw_context, buf, size);
2079
2080
2081         cmd_id = le32_to_cpu(header->id);
2082         *size = le32_to_cpu(header->size) + sizeof(SVGA3dCmdHeader);
2083
2084         cmd_id -= SVGA_3D_CMD_BASE;
2085         if (unlikely(*size > size_remaining))
2086                 goto out_invalid;
2087
2088         if (unlikely(cmd_id >= SVGA_3D_CMD_MAX - SVGA_3D_CMD_BASE))
2089                 goto out_invalid;
2090
2091         entry = &vmw_cmd_entries[cmd_id];
2092         if (unlikely(!entry->func))
2093                 goto out_invalid;
2094
2095         if (unlikely(!entry->user_allow && !sw_context->kernel))
2096                 goto out_privileged;
2097
2098         if (unlikely(entry->gb_disable && gb))
2099                 goto out_old;
2100
2101         if (unlikely(entry->gb_enable && !gb))
2102                 goto out_new;
2103
2104         ret = entry->func(dev_priv, sw_context, header);
2105         if (unlikely(ret != 0))
2106                 goto out_invalid;
2107
2108         return 0;
2109 out_invalid:
2110         DRM_ERROR("Invalid SVGA3D command: %d\n",
2111                   cmd_id + SVGA_3D_CMD_BASE);
2112         return -EINVAL;
2113 out_privileged:
2114         DRM_ERROR("Privileged SVGA3D command: %d\n",
2115                   cmd_id + SVGA_3D_CMD_BASE);
2116         return -EPERM;
2117 out_old:
2118         DRM_ERROR("Deprecated (disallowed) SVGA3D command: %d\n",
2119                   cmd_id + SVGA_3D_CMD_BASE);
2120         return -EINVAL;
2121 out_new:
2122         DRM_ERROR("SVGA3D command: %d not supported by virtual hardware.\n",
2123                   cmd_id + SVGA_3D_CMD_BASE);
2124         return -EINVAL;
2125 }
2126
2127 static int vmw_cmd_check_all(struct vmw_private *dev_priv,
2128                              struct vmw_sw_context *sw_context,
2129                              void *buf,
2130                              uint32_t size)
2131 {
2132         int32_t cur_size = size;
2133         int ret;
2134
2135         sw_context->buf_start = buf;
2136
2137         while (cur_size > 0) {
2138                 size = cur_size;
2139                 ret = vmw_cmd_check(dev_priv, sw_context, buf, &size);
2140                 if (unlikely(ret != 0))
2141                         return ret;
2142                 buf = (void *)((unsigned long) buf + size);
2143                 cur_size -= size;
2144         }
2145
2146         if (unlikely(cur_size != 0)) {
2147                 DRM_ERROR("Command verifier out of sync.\n");
2148                 return -EINVAL;
2149         }
2150
2151         return 0;
2152 }
2153
2154 static void vmw_free_relocations(struct vmw_sw_context *sw_context)
2155 {
2156         sw_context->cur_reloc = 0;
2157 }
2158
2159 static void vmw_apply_relocations(struct vmw_sw_context *sw_context)
2160 {
2161         uint32_t i;
2162         struct vmw_relocation *reloc;
2163         struct ttm_validate_buffer *validate;
2164         struct ttm_buffer_object *bo;
2165
2166         for (i = 0; i < sw_context->cur_reloc; ++i) {
2167                 reloc = &sw_context->relocs[i];
2168                 validate = &sw_context->val_bufs[reloc->index].base;
2169                 bo = validate->bo;
2170                 switch (bo->mem.mem_type) {
2171                 case TTM_PL_VRAM:
2172                         reloc->location->offset += bo->offset;
2173                         reloc->location->gmrId = SVGA_GMR_FRAMEBUFFER;
2174                         break;
2175                 case VMW_PL_GMR:
2176                         reloc->location->gmrId = bo->mem.start;
2177                         break;
2178                 case VMW_PL_MOB:
2179                         *reloc->mob_loc = bo->mem.start;
2180                         break;
2181                 default:
2182                         BUG();
2183                 }
2184         }
2185         vmw_free_relocations(sw_context);
2186 }
2187
2188 /**
2189  * vmw_resource_list_unrefererence - Free up a resource list and unreference
2190  * all resources referenced by it.
2191  *
2192  * @list: The resource list.
2193  */
2194 static void vmw_resource_list_unreference(struct list_head *list)
2195 {
2196         struct vmw_resource_val_node *val, *val_next;
2197
2198         /*
2199          * Drop references to resources held during command submission.
2200          */
2201
2202         list_for_each_entry_safe(val, val_next, list, head) {
2203                 list_del_init(&val->head);
2204                 vmw_resource_unreference(&val->res);
2205                 if (unlikely(val->staged_bindings))
2206                         kfree(val->staged_bindings);
2207                 kfree(val);
2208         }
2209 }
2210
2211 static void vmw_clear_validations(struct vmw_sw_context *sw_context)
2212 {
2213         struct vmw_validate_buffer *entry, *next;
2214         struct vmw_resource_val_node *val;
2215
2216         /*
2217          * Drop references to DMA buffers held during command submission.
2218          */
2219         list_for_each_entry_safe(entry, next, &sw_context->validate_nodes,
2220                                  base.head) {
2221                 list_del(&entry->base.head);
2222                 ttm_bo_unref(&entry->base.bo);
2223                 (void) drm_ht_remove_item(&sw_context->res_ht, &entry->hash);
2224                 sw_context->cur_val_buf--;
2225         }
2226         BUG_ON(sw_context->cur_val_buf != 0);
2227
2228         list_for_each_entry(val, &sw_context->resource_list, head)
2229                 (void) drm_ht_remove_item(&sw_context->res_ht, &val->hash);
2230 }
2231
2232 static int vmw_validate_single_buffer(struct vmw_private *dev_priv,
2233                                       struct ttm_buffer_object *bo,
2234                                       bool validate_as_mob)
2235 {
2236         int ret;
2237
2238
2239         /*
2240          * Don't validate pinned buffers.
2241          */
2242
2243         if (bo == dev_priv->pinned_bo ||
2244             (bo == dev_priv->dummy_query_bo &&
2245              dev_priv->dummy_query_bo_pinned))
2246                 return 0;
2247
2248         if (validate_as_mob)
2249                 return ttm_bo_validate(bo, &vmw_mob_placement, true, false);
2250
2251         /**
2252          * Put BO in VRAM if there is space, otherwise as a GMR.
2253          * If there is no space in VRAM and GMR ids are all used up,
2254          * start evicting GMRs to make room. If the DMA buffer can't be
2255          * used as a GMR, this will return -ENOMEM.
2256          */
2257
2258         ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, true, false);
2259         if (likely(ret == 0 || ret == -ERESTARTSYS))
2260                 return ret;
2261
2262         /**
2263          * If that failed, try VRAM again, this time evicting
2264          * previous contents.
2265          */
2266
2267         DRM_INFO("Falling through to VRAM.\n");
2268         ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false);
2269         return ret;
2270 }
2271
2272 static int vmw_validate_buffers(struct vmw_private *dev_priv,
2273                                 struct vmw_sw_context *sw_context)
2274 {
2275         struct vmw_validate_buffer *entry;
2276         int ret;
2277
2278         list_for_each_entry(entry, &sw_context->validate_nodes, base.head) {
2279                 ret = vmw_validate_single_buffer(dev_priv, entry->base.bo,
2280                                                  entry->validate_as_mob);
2281                 if (unlikely(ret != 0))
2282                         return ret;
2283         }
2284         return 0;
2285 }
2286
2287 static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context,
2288                                  uint32_t size)
2289 {
2290         if (likely(sw_context->cmd_bounce_size >= size))
2291                 return 0;
2292
2293         if (sw_context->cmd_bounce_size == 0)
2294                 sw_context->cmd_bounce_size = VMWGFX_CMD_BOUNCE_INIT_SIZE;
2295
2296         while (sw_context->cmd_bounce_size < size) {
2297                 sw_context->cmd_bounce_size =
2298                         PAGE_ALIGN(sw_context->cmd_bounce_size +
2299                                    (sw_context->cmd_bounce_size >> 1));
2300         }
2301
2302         if (sw_context->cmd_bounce != NULL)
2303                 vfree(sw_context->cmd_bounce);
2304
2305         sw_context->cmd_bounce = vmalloc(sw_context->cmd_bounce_size);
2306
2307         if (sw_context->cmd_bounce == NULL) {
2308                 DRM_ERROR("Failed to allocate command bounce buffer.\n");
2309                 sw_context->cmd_bounce_size = 0;
2310                 return -ENOMEM;
2311         }
2312
2313         return 0;
2314 }
2315
2316 /**
2317  * vmw_execbuf_fence_commands - create and submit a command stream fence
2318  *
2319  * Creates a fence object and submits a command stream marker.
2320  * If this fails for some reason, We sync the fifo and return NULL.
2321  * It is then safe to fence buffers with a NULL pointer.
2322  *
2323  * If @p_handle is not NULL @file_priv must also not be NULL. Creates
2324  * a userspace handle if @p_handle is not NULL, otherwise not.
2325  */
2326
2327 int vmw_execbuf_fence_commands(struct drm_file *file_priv,
2328                                struct vmw_private *dev_priv,
2329                                struct vmw_fence_obj **p_fence,
2330                                uint32_t *p_handle)
2331 {
2332         uint32_t sequence;
2333         int ret;
2334         bool synced = false;
2335
2336         /* p_handle implies file_priv. */
2337         BUG_ON(p_handle != NULL && file_priv == NULL);
2338
2339         ret = vmw_fifo_send_fence(dev_priv, &sequence);
2340         if (unlikely(ret != 0)) {
2341                 DRM_ERROR("Fence submission error. Syncing.\n");
2342                 synced = true;
2343         }
2344
2345         if (p_handle != NULL)
2346                 ret = vmw_user_fence_create(file_priv, dev_priv->fman,
2347                                             sequence, p_fence, p_handle);
2348         else
2349                 ret = vmw_fence_create(dev_priv->fman, sequence, p_fence);
2350
2351         if (unlikely(ret != 0 && !synced)) {
2352                 (void) vmw_fallback_wait(dev_priv, false, false,
2353                                          sequence, false,
2354                                          VMW_FENCE_WAIT_TIMEOUT);
2355                 *p_fence = NULL;
2356         }
2357
2358         return 0;
2359 }
2360
2361 /**
2362  * vmw_execbuf_copy_fence_user - copy fence object information to
2363  * user-space.
2364  *
2365  * @dev_priv: Pointer to a vmw_private struct.
2366  * @vmw_fp: Pointer to the struct vmw_fpriv representing the calling file.
2367  * @ret: Return value from fence object creation.
2368  * @user_fence_rep: User space address of a struct drm_vmw_fence_rep to
2369  * which the information should be copied.
2370  * @fence: Pointer to the fenc object.
2371  * @fence_handle: User-space fence handle.
2372  *
2373  * This function copies fence information to user-space. If copying fails,
2374  * The user-space struct drm_vmw_fence_rep::error member is hopefully
2375  * left untouched, and if it's preloaded with an -EFAULT by user-space,
2376  * the error will hopefully be detected.
2377  * Also if copying fails, user-space will be unable to signal the fence
2378  * object so we wait for it immediately, and then unreference the
2379  * user-space reference.
2380  */
2381 void
2382 vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
2383                             struct vmw_fpriv *vmw_fp,
2384                             int ret,
2385                             struct drm_vmw_fence_rep __user *user_fence_rep,
2386                             struct vmw_fence_obj *fence,
2387                             uint32_t fence_handle)
2388 {
2389         struct drm_vmw_fence_rep fence_rep;
2390
2391         if (user_fence_rep == NULL)
2392                 return;
2393
2394         memset(&fence_rep, 0, sizeof(fence_rep));
2395
2396         fence_rep.error = ret;
2397         if (ret == 0) {
2398                 BUG_ON(fence == NULL);
2399
2400                 fence_rep.handle = fence_handle;
2401                 fence_rep.seqno = fence->base.seqno;
2402                 vmw_update_seqno(dev_priv, &dev_priv->fifo);
2403                 fence_rep.passed_seqno = dev_priv->last_read_seqno;
2404         }
2405
2406         /*
2407          * copy_to_user errors will be detected by user space not
2408          * seeing fence_rep::error filled in. Typically
2409          * user-space would have pre-set that member to -EFAULT.
2410          */
2411         ret = copy_to_user(user_fence_rep, &fence_rep,
2412                            sizeof(fence_rep));
2413
2414         /*
2415          * User-space lost the fence object. We need to sync
2416          * and unreference the handle.
2417          */
2418         if (unlikely(ret != 0) && (fence_rep.error == 0)) {
2419                 ttm_ref_object_base_unref(vmw_fp->tfile,
2420                                           fence_handle, TTM_REF_USAGE);
2421                 DRM_ERROR("Fence copy error. Syncing.\n");
2422                 (void) vmw_fence_obj_wait(fence, false, false,
2423                                           VMW_FENCE_WAIT_TIMEOUT);
2424         }
2425 }
2426
2427 /**
2428  * vmw_execbuf_submit_fifo - Patch a command batch and submit it using
2429  * the fifo.
2430  *
2431  * @dev_priv: Pointer to a device private structure.
2432  * @kernel_commands: Pointer to the unpatched command batch.
2433  * @command_size: Size of the unpatched command batch.
2434  * @sw_context: Structure holding the relocation lists.
2435  *
2436  * Side effects: If this function returns 0, then the command batch
2437  * pointed to by @kernel_commands will have been modified.
2438  */
2439 static int vmw_execbuf_submit_fifo(struct vmw_private *dev_priv,
2440                                    void *kernel_commands,
2441                                    u32 command_size,
2442                                    struct vmw_sw_context *sw_context)
2443 {
2444         void *cmd = vmw_fifo_reserve(dev_priv, command_size);
2445
2446         if (!cmd) {
2447                 DRM_ERROR("Failed reserving fifo space for commands.\n");
2448                 return -ENOMEM;
2449         }
2450
2451         vmw_apply_relocations(sw_context);
2452         memcpy(cmd, kernel_commands, command_size);
2453         vmw_resource_relocations_apply(cmd, &sw_context->res_relocations);
2454         vmw_resource_relocations_free(&sw_context->res_relocations);
2455         vmw_fifo_commit(dev_priv, command_size);
2456
2457         return 0;
2458 }
2459
2460 /**
2461  * vmw_execbuf_submit_cmdbuf - Patch a command batch and submit it using
2462  * the command buffer manager.
2463  *
2464  * @dev_priv: Pointer to a device private structure.
2465  * @header: Opaque handle to the command buffer allocation.
2466  * @command_size: Size of the unpatched command batch.
2467  * @sw_context: Structure holding the relocation lists.
2468  *
2469  * Side effects: If this function returns 0, then the command buffer
2470  * represented by @header will have been modified.
2471  */
2472 static int vmw_execbuf_submit_cmdbuf(struct vmw_private *dev_priv,
2473                                      struct vmw_cmdbuf_header *header,
2474                                      u32 command_size,
2475                                      struct vmw_sw_context *sw_context)
2476 {
2477         void *cmd = vmw_cmdbuf_reserve(dev_priv->cman, command_size,
2478                                        SVGA3D_INVALID_ID, false, header);
2479
2480         vmw_apply_relocations(sw_context);
2481         vmw_resource_relocations_apply(cmd, &sw_context->res_relocations);
2482         vmw_resource_relocations_free(&sw_context->res_relocations);
2483         vmw_cmdbuf_commit(dev_priv->cman, command_size, header, false);
2484
2485         return 0;
2486 }
2487
2488 /**
2489  * vmw_execbuf_cmdbuf - Prepare, if possible, a user-space command batch for
2490  * submission using a command buffer.
2491  *
2492  * @dev_priv: Pointer to a device private structure.
2493  * @user_commands: User-space pointer to the commands to be submitted.
2494  * @command_size: Size of the unpatched command batch.
2495  * @header: Out parameter returning the opaque pointer to the command buffer.
2496  *
2497  * This function checks whether we can use the command buffer manager for
2498  * submission and if so, creates a command buffer of suitable size and
2499  * copies the user data into that buffer.
2500  *
2501  * On successful return, the function returns a pointer to the data in the
2502  * command buffer and *@header is set to non-NULL.
2503  * If command buffers could not be used, the function will return the value
2504  * of @kernel_commands on function call. That value may be NULL. In that case,
2505  * the value of *@header will be set to NULL.
2506  * If an error is encountered, the function will return a pointer error value.
2507  * If the function is interrupted by a signal while sleeping, it will return
2508  * -ERESTARTSYS casted to a pointer error value.
2509  */
2510 void *vmw_execbuf_cmdbuf(struct vmw_private *dev_priv,
2511                          void __user *user_commands,
2512                          void *kernel_commands,
2513                          u32 command_size,
2514                          struct vmw_cmdbuf_header **header)
2515 {
2516         size_t cmdbuf_size;
2517         int ret;
2518
2519         *header = NULL;
2520         if (!dev_priv->cman || kernel_commands)
2521                 return kernel_commands;
2522
2523         if (command_size > SVGA_CB_MAX_SIZE) {
2524                 DRM_ERROR("Command buffer is too large.\n");
2525                 return ERR_PTR(-EINVAL);
2526         }
2527
2528         /* If possible, add a little space for fencing. */
2529         cmdbuf_size = command_size + 512;
2530         cmdbuf_size = min_t(size_t, cmdbuf_size, SVGA_CB_MAX_SIZE);
2531         kernel_commands = vmw_cmdbuf_alloc(dev_priv->cman, cmdbuf_size,
2532                                            true, header);
2533         if (IS_ERR(kernel_commands))
2534                 return kernel_commands;
2535
2536         ret = copy_from_user(kernel_commands, user_commands,
2537                              command_size);
2538         if (ret) {
2539                 DRM_ERROR("Failed copying commands.\n");
2540                 vmw_cmdbuf_header_free(*header);
2541                 *header = NULL;
2542                 return ERR_PTR(-EFAULT);
2543         }
2544
2545         return kernel_commands;
2546 }
2547
2548 int vmw_execbuf_process(struct drm_file *file_priv,
2549                         struct vmw_private *dev_priv,
2550                         void __user *user_commands,
2551                         void *kernel_commands,
2552                         uint32_t command_size,
2553                         uint64_t throttle_us,
2554                         uint32_t quirks,
2555                         struct drm_vmw_fence_rep __user *user_fence_rep,
2556                         struct vmw_fence_obj **out_fence)
2557 {
2558         struct vmw_sw_context *sw_context = &dev_priv->ctx;
2559         struct vmw_fence_obj *fence = NULL;
2560         struct vmw_resource *error_resource;
2561         struct list_head resource_list;
2562         struct vmw_cmdbuf_header *header;
2563         struct ww_acquire_ctx ticket;
2564         uint32_t handle;
2565         int ret;
2566
2567         if (throttle_us) {
2568                 ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.marker_queue,
2569                                    throttle_us);
2570
2571                 if (ret)
2572                         return ret;
2573         }
2574
2575         kernel_commands = vmw_execbuf_cmdbuf(dev_priv, user_commands,
2576                                              kernel_commands, command_size,
2577                                              &header);
2578         if (IS_ERR(kernel_commands))
2579                 return PTR_ERR(kernel_commands);
2580
2581         ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
2582         if (ret) {
2583                 ret = -ERESTARTSYS;
2584                 goto out_free_header;
2585         }
2586
2587         sw_context->kernel = false;
2588         if (kernel_commands == NULL) {
2589                 ret = vmw_resize_cmd_bounce(sw_context, command_size);
2590                 if (unlikely(ret != 0))
2591                         goto out_unlock;
2592
2593
2594                 ret = copy_from_user(sw_context->cmd_bounce,
2595                                      user_commands, command_size);
2596
2597                 if (unlikely(ret != 0)) {
2598                         ret = -EFAULT;
2599                         DRM_ERROR("Failed copying commands.\n");
2600                         goto out_unlock;
2601                 }
2602                 kernel_commands = sw_context->cmd_bounce;
2603         } else if (!header)
2604                 sw_context->kernel = true;
2605
2606         sw_context->fp = vmw_fpriv(file_priv);
2607         sw_context->cur_reloc = 0;
2608         sw_context->cur_val_buf = 0;
2609         sw_context->quirks = quirks;
2610         INIT_LIST_HEAD(&sw_context->resource_list);
2611         sw_context->cur_query_bo = dev_priv->pinned_bo;
2612         sw_context->last_query_ctx = NULL;
2613         sw_context->needs_post_query_barrier = false;
2614         memset(sw_context->res_cache, 0, sizeof(sw_context->res_cache));
2615         INIT_LIST_HEAD(&sw_context->validate_nodes);
2616         INIT_LIST_HEAD(&sw_context->res_relocations);
2617         if (!sw_context->res_ht_initialized) {
2618                 ret = drm_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER);
2619                 if (unlikely(ret != 0))
2620                         goto out_unlock;
2621                 sw_context->res_ht_initialized = true;
2622         }
2623         INIT_LIST_HEAD(&sw_context->staged_cmd_res);
2624         INIT_LIST_HEAD(&resource_list);
2625         ret = vmw_cmd_check_all(dev_priv, sw_context, kernel_commands,
2626                                 command_size);
2627         if (unlikely(ret != 0))
2628                 goto out_err_nores;
2629
2630         ret = vmw_resources_reserve(sw_context);
2631         if (unlikely(ret != 0))
2632                 goto out_err_nores;
2633
2634         ret = ttm_eu_reserve_buffers(&ticket, &sw_context->validate_nodes,
2635                                      true, NULL);
2636         if (unlikely(ret != 0))
2637                 goto out_err;
2638
2639         ret = vmw_validate_buffers(dev_priv, sw_context);
2640         if (unlikely(ret != 0))
2641                 goto out_err;
2642
2643         ret = vmw_resources_validate(sw_context);
2644         if (unlikely(ret != 0))
2645                 goto out_err;
2646
2647         ret = mutex_lock_interruptible(&dev_priv->binding_mutex);
2648         if (unlikely(ret != 0)) {
2649                 ret = -ERESTARTSYS;
2650                 goto out_err;
2651         }
2652
2653         if (dev_priv->has_mob) {
2654                 ret = vmw_rebind_contexts(sw_context);
2655                 if (unlikely(ret != 0))
2656                         goto out_unlock_binding;
2657         }
2658
2659         if (!header) {
2660                 ret = vmw_execbuf_submit_fifo(dev_priv, kernel_commands,
2661                                               command_size, sw_context);
2662         } else {
2663                 ret = vmw_execbuf_submit_cmdbuf(dev_priv, header, command_size,
2664                                                 sw_context);
2665                 header = NULL;
2666         }
2667         if (ret)
2668                 goto out_unlock_binding;
2669
2670         vmw_query_bo_switch_commit(dev_priv, sw_context);
2671         ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
2672                                          &fence,
2673                                          (user_fence_rep) ? &handle : NULL);
2674         /*
2675          * This error is harmless, because if fence submission fails,
2676          * vmw_fifo_send_fence will sync. The error will be propagated to
2677          * user-space in @fence_rep
2678          */
2679
2680         if (ret != 0)
2681                 DRM_ERROR("Fence submission error. Syncing.\n");
2682
2683         vmw_resource_list_unreserve(&sw_context->resource_list, false);
2684         mutex_unlock(&dev_priv->binding_mutex);
2685
2686         ttm_eu_fence_buffer_objects(&ticket, &sw_context->validate_nodes,
2687                                     (void *) fence);
2688
2689         if (unlikely(dev_priv->pinned_bo != NULL &&
2690                      !dev_priv->query_cid_valid))
2691                 __vmw_execbuf_release_pinned_bo(dev_priv, fence);
2692
2693         vmw_clear_validations(sw_context);
2694         vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret,
2695                                     user_fence_rep, fence, handle);
2696
2697         /* Don't unreference when handing fence out */
2698         if (unlikely(out_fence != NULL)) {
2699                 *out_fence = fence;
2700                 fence = NULL;
2701         } else if (likely(fence != NULL)) {
2702                 vmw_fence_obj_unreference(&fence);
2703         }
2704
2705         list_splice_init(&sw_context->resource_list, &resource_list);
2706         vmw_cmdbuf_res_commit(&sw_context->staged_cmd_res);
2707         mutex_unlock(&dev_priv->cmdbuf_mutex);
2708
2709         /*
2710          * Unreference resources outside of the cmdbuf_mutex to
2711          * avoid deadlocks in resource destruction paths.
2712          */
2713         vmw_resource_list_unreference(&resource_list);
2714
2715         return 0;
2716
2717 out_unlock_binding:
2718         mutex_unlock(&dev_priv->binding_mutex);
2719 out_err:
2720         ttm_eu_backoff_reservation(&ticket, &sw_context->validate_nodes);
2721 out_err_nores:
2722         vmw_resource_list_unreserve(&sw_context->resource_list, true);
2723         vmw_resource_relocations_free(&sw_context->res_relocations);
2724         vmw_free_relocations(sw_context);
2725         vmw_clear_validations(sw_context);
2726         if (unlikely(dev_priv->pinned_bo != NULL &&
2727                      !dev_priv->query_cid_valid))
2728                 __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
2729 out_unlock:
2730         list_splice_init(&sw_context->resource_list, &resource_list);
2731         error_resource = sw_context->error_resource;
2732         sw_context->error_resource = NULL;
2733         vmw_cmdbuf_res_revert(&sw_context->staged_cmd_res);
2734         mutex_unlock(&dev_priv->cmdbuf_mutex);
2735
2736         /*
2737          * Unreference resources outside of the cmdbuf_mutex to
2738          * avoid deadlocks in resource destruction paths.
2739          */
2740         vmw_resource_list_unreference(&resource_list);
2741         if (unlikely(error_resource != NULL))
2742                 vmw_resource_unreference(&error_resource);
2743 out_free_header:
2744         if (header)
2745                 vmw_cmdbuf_header_free(header);
2746
2747         return ret;
2748 }
2749
2750 /**
2751  * vmw_execbuf_unpin_panic - Idle the fifo and unpin the query buffer.
2752  *
2753  * @dev_priv: The device private structure.
2754  *
2755  * This function is called to idle the fifo and unpin the query buffer
2756  * if the normal way to do this hits an error, which should typically be
2757  * extremely rare.
2758  */
2759 static void vmw_execbuf_unpin_panic(struct vmw_private *dev_priv)
2760 {
2761         DRM_ERROR("Can't unpin query buffer. Trying to recover.\n");
2762
2763         (void) vmw_fallback_wait(dev_priv, false, true, 0, false, 10*HZ);
2764         vmw_bo_pin(dev_priv->pinned_bo, false);
2765         vmw_bo_pin(dev_priv->dummy_query_bo, false);
2766         dev_priv->dummy_query_bo_pinned = false;
2767 }
2768
2769
2770 /**
2771  * __vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
2772  * query bo.
2773  *
2774  * @dev_priv: The device private structure.
2775  * @fence: If non-NULL should point to a struct vmw_fence_obj issued
2776  * _after_ a query barrier that flushes all queries touching the current
2777  * buffer pointed to by @dev_priv->pinned_bo
2778  *
2779  * This function should be used to unpin the pinned query bo, or
2780  * as a query barrier when we need to make sure that all queries have
2781  * finished before the next fifo command. (For example on hardware
2782  * context destructions where the hardware may otherwise leak unfinished
2783  * queries).
2784  *
2785  * This function does not return any failure codes, but make attempts
2786  * to do safe unpinning in case of errors.
2787  *
2788  * The function will synchronize on the previous query barrier, and will
2789  * thus not finish until that barrier has executed.
2790  *
2791  * the @dev_priv->cmdbuf_mutex needs to be held by the current thread
2792  * before calling this function.
2793  */
2794 void __vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv,
2795                                      struct vmw_fence_obj *fence)
2796 {
2797         int ret = 0;
2798         struct list_head validate_list;
2799         struct ttm_validate_buffer pinned_val, query_val;
2800         struct vmw_fence_obj *lfence = NULL;
2801         struct ww_acquire_ctx ticket;
2802
2803         if (dev_priv->pinned_bo == NULL)
2804                 goto out_unlock;
2805
2806         INIT_LIST_HEAD(&validate_list);
2807
2808         pinned_val.bo = ttm_bo_reference(dev_priv->pinned_bo);
2809         pinned_val.shared = false;
2810         list_add_tail(&pinned_val.head, &validate_list);
2811
2812         query_val.bo = ttm_bo_reference(dev_priv->dummy_query_bo);
2813         query_val.shared = false;
2814         list_add_tail(&query_val.head, &validate_list);
2815
2816         ret = ttm_eu_reserve_buffers(&ticket, &validate_list,
2817                                      false, NULL);
2818         if (unlikely(ret != 0)) {
2819                 vmw_execbuf_unpin_panic(dev_priv);
2820                 goto out_no_reserve;
2821         }
2822
2823         if (dev_priv->query_cid_valid) {
2824                 BUG_ON(fence != NULL);
2825                 ret = vmw_fifo_emit_dummy_query(dev_priv, dev_priv->query_cid);
2826                 if (unlikely(ret != 0)) {
2827                         vmw_execbuf_unpin_panic(dev_priv);
2828                         goto out_no_emit;
2829                 }
2830                 dev_priv->query_cid_valid = false;
2831         }
2832
2833         vmw_bo_pin(dev_priv->pinned_bo, false);
2834         vmw_bo_pin(dev_priv->dummy_query_bo, false);
2835         dev_priv->dummy_query_bo_pinned = false;
2836
2837         if (fence == NULL) {
2838                 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &lfence,
2839                                                   NULL);
2840                 fence = lfence;
2841         }
2842         ttm_eu_fence_buffer_objects(&ticket, &validate_list, (void *) fence);
2843         if (lfence != NULL)
2844                 vmw_fence_obj_unreference(&lfence);
2845
2846         ttm_bo_unref(&query_val.bo);
2847         ttm_bo_unref(&pinned_val.bo);
2848         ttm_bo_unref(&dev_priv->pinned_bo);
2849
2850 out_unlock:
2851         return;
2852
2853 out_no_emit:
2854         ttm_eu_backoff_reservation(&ticket, &validate_list);
2855 out_no_reserve:
2856         ttm_bo_unref(&query_val.bo);
2857         ttm_bo_unref(&pinned_val.bo);
2858         ttm_bo_unref(&dev_priv->pinned_bo);
2859 }
2860
2861 /**
2862  * vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
2863  * query bo.
2864  *
2865  * @dev_priv: The device private structure.
2866  *
2867  * This function should be used to unpin the pinned query bo, or
2868  * as a query barrier when we need to make sure that all queries have
2869  * finished before the next fifo command. (For example on hardware
2870  * context destructions where the hardware may otherwise leak unfinished
2871  * queries).
2872  *
2873  * This function does not return any failure codes, but make attempts
2874  * to do safe unpinning in case of errors.
2875  *
2876  * The function will synchronize on the previous query barrier, and will
2877  * thus not finish until that barrier has executed.
2878  */
2879 void vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv)
2880 {
2881         mutex_lock(&dev_priv->cmdbuf_mutex);
2882         if (dev_priv->query_cid_valid)
2883                 __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
2884         mutex_unlock(&dev_priv->cmdbuf_mutex);
2885 }
2886
2887
2888 int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
2889                       struct drm_file *file_priv)
2890 {
2891         struct vmw_private *dev_priv = vmw_priv(dev);
2892         struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data;
2893         int ret;
2894
2895         /*
2896          * This will allow us to extend the ioctl argument while
2897          * maintaining backwards compatibility:
2898          * We take different code paths depending on the value of
2899          * arg->version.
2900          */
2901
2902         if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) {
2903                 DRM_ERROR("Incorrect execbuf version.\n");
2904                 DRM_ERROR("You're running outdated experimental "
2905                           "vmwgfx user-space drivers.");
2906                 return -EINVAL;
2907         }
2908
2909         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
2910         if (unlikely(ret != 0))
2911                 return ret;
2912
2913         ret = vmw_execbuf_process(file_priv, dev_priv,
2914                                   (void __user *)(unsigned long)arg->commands,
2915                                   NULL, arg->command_size, arg->throttle_us,
2916                                   0,
2917                                   (void __user *)(unsigned long)arg->fence_rep,
2918                                   NULL);
2919         ttm_read_unlock(&dev_priv->reservation_sem);
2920         if (unlikely(ret != 0))
2921                 return ret;
2922
2923         vmw_kms_cursor_post_execbuf(dev_priv);
2924
2925         return 0;
2926 }