kernel/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         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 683                                  user_surface_converter,
 684                                  &cmd->body.dest.sid, NULL);
 685 }
 686
 687 static int vmw_cmd_stretch_blt_check(struct vmw_private *dev_priv,
 688                                      struct vmw_sw_context *sw_context,
 689                                      SVGA3dCmdHeader *header)
 690 {
 691         struct vmw_sid_cmd {
 692                 SVGA3dCmdHeader header;
 693                 SVGA3dCmdSurfaceStretchBlt body;
 694         } *cmd;
 695         int ret;
 696
 697         cmd = container_of(header, struct vmw_sid_cmd, header);
 698         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 699                                 user_surface_converter,
 700                                 &cmd->body.src.sid, NULL);
 701         if (unlikely(ret != 0))
 702                 return ret;
 703         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 704                                  user_surface_converter,
 705                                  &cmd->body.dest.sid, NULL);
 706 }
 707
 708 static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv,
 709                                          struct vmw_sw_context *sw_context,
 710                                          SVGA3dCmdHeader *header)
 711 {
 712         struct vmw_sid_cmd {
 713                 SVGA3dCmdHeader header;
 714                 SVGA3dCmdBlitSurfaceToScreen body;
 715         } *cmd;
 716
 717         cmd = container_of(header, struct vmw_sid_cmd, header);
 718
 719         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 720                                  user_surface_converter,
 721                                  &cmd->body.srcImage.sid, NULL);
 722 }
 723
 724 static int vmw_cmd_present_check(struct vmw_private *dev_priv,
 725                                  struct vmw_sw_context *sw_context,
 726                                  SVGA3dCmdHeader *header)
 727 {
 728         struct vmw_sid_cmd {
 729                 SVGA3dCmdHeader header;
 730                 SVGA3dCmdPresent body;
 731         } *cmd;
 732
 733
 734         cmd = container_of(header, struct vmw_sid_cmd, header);
 735
 736         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
 737                                  user_surface_converter, &cmd->body.sid,
 738                                  NULL);
 739 }
 740
 741 /**
 742  * vmw_query_bo_switch_prepare - Prepare to switch pinned buffer for queries.
 743  *
 744  * @dev_priv: The device private structure.
 745  * @new_query_bo: The new buffer holding query results.
 746  * @sw_context: The software context used for this command submission.
 747  *
 748  * This function checks whether @new_query_bo is suitable for holding
 749  * query results, and if another buffer currently is pinned for query
 750  * results. If so, the function prepares the state of @sw_context for
 751  * switching pinned buffers after successful submission of the current
 752  * command batch.
 753  */
 754 static int vmw_query_bo_switch_prepare(struct vmw_private *dev_priv,
 755                                        struct ttm_buffer_object *new_query_bo,
 756                                        struct vmw_sw_context *sw_context)
 757 {
 758         struct vmw_res_cache_entry *ctx_entry =
 759                 &sw_context->res_cache[vmw_res_context];
 760         int ret;
 761
 762         BUG_ON(!ctx_entry->valid);
 763         sw_context->last_query_ctx = ctx_entry->res;
 764
 765         if (unlikely(new_query_bo != sw_context->cur_query_bo)) {
 766
 767                 if (unlikely(new_query_bo->num_pages > 4)) {
 768                         DRM_ERROR("Query buffer too large.\n");
 769                         return -EINVAL;
 770                 }
 771
 772                 if (unlikely(sw_context->cur_query_bo != NULL)) {
 773                         sw_context->needs_post_query_barrier = true;
 774                         ret = vmw_bo_to_validate_list(sw_context,
 775                                                       sw_context->cur_query_bo,
 776                                                       dev_priv->has_mob, NULL);
 777                         if (unlikely(ret != 0))
 778                                 return ret;
 779                 }
 780                 sw_context->cur_query_bo = new_query_bo;
 781
 782                 ret = vmw_bo_to_validate_list(sw_context,
 783                                               dev_priv->dummy_query_bo,
 784                                               dev_priv->has_mob, NULL);
 785                 if (unlikely(ret != 0))
 786                         return ret;
 787
 788         }
 789
 790         return 0;
 791 }
 792
 793
 794 /**
 795  * vmw_query_bo_switch_commit - Finalize switching pinned query buffer
 796  *
 797  * @dev_priv: The device private structure.
 798  * @sw_context: The software context used for this command submission batch.
 799  *
 800  * This function will check if we're switching query buffers, and will then,
 801  * issue a dummy occlusion query wait used as a query barrier. When the fence
 802  * object following that query wait has signaled, we are sure that all
 803  * preceding queries have finished, and the old query buffer can be unpinned.
 804  * However, since both the new query buffer and the old one are fenced with
 805  * that fence, we can do an asynchronus unpin now, and be sure that the
 806  * old query buffer won't be moved until the fence has signaled.
 807  *
 808  * As mentioned above, both the new - and old query buffers need to be fenced
 809  * using a sequence emitted *after* calling this function.
 810  */
 811 static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv,
 812                                      struct vmw_sw_context *sw_context)
 813 {
 814         /*
 815          * The validate list should still hold references to all
 816          * contexts here.
 817          */
 818
 819         if (sw_context->needs_post_query_barrier) {
 820                 struct vmw_res_cache_entry *ctx_entry =
 821                         &sw_context->res_cache[vmw_res_context];
 822                 struct vmw_resource *ctx;
 823                 int ret;
 824
 825                 BUG_ON(!ctx_entry->valid);
 826                 ctx = ctx_entry->res;
 827
 828                 ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id);
 829
 830                 if (unlikely(ret != 0))
 831                         DRM_ERROR("Out of fifo space for dummy query.\n");
 832         }
 833
 834         if (dev_priv->pinned_bo != sw_context->cur_query_bo) {
 835                 if (dev_priv->pinned_bo) {
 836                         vmw_bo_pin(dev_priv->pinned_bo, false);
 837                         ttm_bo_unref(&dev_priv->pinned_bo);
 838                 }
 839
 840                 if (!sw_context->needs_post_query_barrier) {
 841                         vmw_bo_pin(sw_context->cur_query_bo, true);
 842
 843                         /*
 844                          * We pin also the dummy_query_bo buffer so that we
 845                          * don't need to validate it when emitting
 846                          * dummy queries in context destroy paths.
 847                          */
 848
 849                         vmw_bo_pin(dev_priv->dummy_query_bo, true);
 850                         dev_priv->dummy_query_bo_pinned = true;
 851
 852                         BUG_ON(sw_context->last_query_ctx == NULL);
 853                         dev_priv->query_cid = sw_context->last_query_ctx->id;
 854                         dev_priv->query_cid_valid = true;
 855                         dev_priv->pinned_bo =
 856                                 ttm_bo_reference(sw_context->cur_query_bo);
 857                 }
 858         }
 859 }
 860
 861 /**
 862  * vmw_translate_mob_pointer - Prepare to translate a user-space buffer
 863  * handle to a MOB id.
 864  *
 865  * @dev_priv: Pointer to a device private structure.
 866  * @sw_context: The software context used for this command batch validation.
 867  * @id: Pointer to the user-space handle to be translated.
 868  * @vmw_bo_p: Points to a location that, on successful return will carry
 869  * a reference-counted pointer to the DMA buffer identified by the
 870  * user-space handle in @id.
 871  *
 872  * This function saves information needed to translate a user-space buffer
 873  * handle to a MOB id. The translation does not take place immediately, but
 874  * during a call to vmw_apply_relocations(). This function builds a relocation
 875  * list and a list of buffers to validate. The former needs to be freed using
 876  * either vmw_apply_relocations() or vmw_free_relocations(). The latter
 877  * needs to be freed using vmw_clear_validations.
 878  */
 879 static int vmw_translate_mob_ptr(struct vmw_private *dev_priv,
 880                                  struct vmw_sw_context *sw_context,
 881                                  SVGAMobId *id,
 882                                  struct vmw_dma_buffer **vmw_bo_p)
 883 {
 884         struct vmw_dma_buffer *vmw_bo = NULL;
 885         struct ttm_buffer_object *bo;
 886         uint32_t handle = *id;
 887         struct vmw_relocation *reloc;
 888         int ret;
 889
 890         ret = vmw_user_dmabuf_lookup(sw_context->fp->tfile, handle, &vmw_bo);
 891         if (unlikely(ret != 0)) {
 892                 DRM_ERROR("Could not find or use MOB buffer.\n");
 893                 ret = -EINVAL;
 894                 goto out_no_reloc;
 895         }
 896         bo = &vmw_bo->base;
 897
 898         if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
 899                 DRM_ERROR("Max number relocations per submission"
 900                           " exceeded\n");
 901                 ret = -EINVAL;
 902                 goto out_no_reloc;
 903         }
 904
 905         reloc = &sw_context->relocs[sw_context->cur_reloc++];
 906         reloc->mob_loc = id;
 907         reloc->location = NULL;
 908
 909         ret = vmw_bo_to_validate_list(sw_context, bo, true, &reloc->index);
 910         if (unlikely(ret != 0))
 911                 goto out_no_reloc;
 912
 913         *vmw_bo_p = vmw_bo;
 914         return 0;
 915
 916 out_no_reloc:
 917         vmw_dmabuf_unreference(&vmw_bo);
 918         *vmw_bo_p = NULL;
 919         return ret;
 920 }
 921
 922 /**
 923  * vmw_translate_guest_pointer - Prepare to translate a user-space buffer
 924  * handle to a valid SVGAGuestPtr
 925  *
 926  * @dev_priv: Pointer to a device private structure.
 927  * @sw_context: The software context used for this command batch validation.
 928  * @ptr: Pointer to the user-space handle to be translated.
 929  * @vmw_bo_p: Points to a location that, on successful return will carry
 930  * a reference-counted pointer to the DMA buffer identified by the
 931  * user-space handle in @id.
 932  *
 933  * This function saves information needed to translate a user-space buffer
 934  * handle to a valid SVGAGuestPtr. The translation does not take place
 935  * immediately, but during a call to vmw_apply_relocations().
 936  * This function builds a relocation list and a list of buffers to validate.
 937  * The former needs to be freed using either vmw_apply_relocations() or
 938  * vmw_free_relocations(). The latter needs to be freed using
 939  * vmw_clear_validations.
 940  */
 941 static int vmw_translate_guest_ptr(struct vmw_private *dev_priv,
 942                                    struct vmw_sw_context *sw_context,
 943                                    SVGAGuestPtr *ptr,
 944                                    struct vmw_dma_buffer **vmw_bo_p)
 945 {
 946         struct vmw_dma_buffer *vmw_bo = NULL;
 947         struct ttm_buffer_object *bo;
 948         uint32_t handle = ptr->gmrId;
 949         struct vmw_relocation *reloc;
 950         int ret;
 951
 952         ret = vmw_user_dmabuf_lookup(sw_context->fp->tfile, handle, &vmw_bo);
 953         if (unlikely(ret != 0)) {
 954                 DRM_ERROR("Could not find or use GMR region.\n");
 955                 ret = -EINVAL;
 956                 goto out_no_reloc;
 957         }
 958         bo = &vmw_bo->base;
 959
 960         if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
 961                 DRM_ERROR("Max number relocations per submission"
 962                           " exceeded\n");
 963                 ret = -EINVAL;
 964                 goto out_no_reloc;
 965         }
 966
 967         reloc = &sw_context->relocs[sw_context->cur_reloc++];
 968         reloc->location = ptr;
 969
 970         ret = vmw_bo_to_validate_list(sw_context, bo, false, &reloc->index);
 971         if (unlikely(ret != 0))
 972                 goto out_no_reloc;
 973
 974         *vmw_bo_p = vmw_bo;
 975         return 0;
 976
 977 out_no_reloc:
 978         vmw_dmabuf_unreference(&vmw_bo);
 979         *vmw_bo_p = NULL;
 980         return ret;
 981 }
 982
 983 /**
 984  * vmw_cmd_begin_gb_query - validate a  SVGA_3D_CMD_BEGIN_GB_QUERY command.
 985  *
 986  * @dev_priv: Pointer to a device private struct.
 987  * @sw_context: The software context used for this command submission.
 988  * @header: Pointer to the command header in the command stream.
 989  */
 990 static int vmw_cmd_begin_gb_query(struct vmw_private *dev_priv,
 991                                   struct vmw_sw_context *sw_context,
 992                                   SVGA3dCmdHeader *header)
 993 {
 994         struct vmw_begin_gb_query_cmd {
 995                 SVGA3dCmdHeader header;
 996                 SVGA3dCmdBeginGBQuery q;
 997         } *cmd;
 998
 999         cmd = container_of(header, struct vmw_begin_gb_query_cmd,
1000                            header);
1001
1002         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1003                                  user_context_converter, &cmd->q.cid,
1004                                  NULL);
1005 }
1006
1007 /**
1008  * vmw_cmd_begin_query - validate a  SVGA_3D_CMD_BEGIN_QUERY command.
1009  *
1010  * @dev_priv: Pointer to a device private struct.
1011  * @sw_context: The software context used for this command submission.
1012  * @header: Pointer to the command header in the command stream.
1013  */
1014 static int vmw_cmd_begin_query(struct vmw_private *dev_priv,
1015                                struct vmw_sw_context *sw_context,
1016                                SVGA3dCmdHeader *header)
1017 {
1018         struct vmw_begin_query_cmd {
1019                 SVGA3dCmdHeader header;
1020                 SVGA3dCmdBeginQuery q;
1021         } *cmd;
1022
1023         cmd = container_of(header, struct vmw_begin_query_cmd,
1024                            header);
1025
1026         if (unlikely(dev_priv->has_mob)) {
1027                 struct {
1028                         SVGA3dCmdHeader header;
1029                         SVGA3dCmdBeginGBQuery q;
1030                 } gb_cmd;
1031
1032                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1033
1034                 gb_cmd.header.id = SVGA_3D_CMD_BEGIN_GB_QUERY;
1035                 gb_cmd.header.size = cmd->header.size;
1036                 gb_cmd.q.cid = cmd->q.cid;
1037                 gb_cmd.q.type = cmd->q.type;
1038
1039                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1040                 return vmw_cmd_begin_gb_query(dev_priv, sw_context, header);
1041         }
1042
1043         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1044                                  user_context_converter, &cmd->q.cid,
1045                                  NULL);
1046 }
1047
1048 /**
1049  * vmw_cmd_end_gb_query - validate a  SVGA_3D_CMD_END_GB_QUERY command.
1050  *
1051  * @dev_priv: Pointer to a device private struct.
1052  * @sw_context: The software context used for this command submission.
1053  * @header: Pointer to the command header in the command stream.
1054  */
1055 static int vmw_cmd_end_gb_query(struct vmw_private *dev_priv,
1056                                 struct vmw_sw_context *sw_context,
1057                                 SVGA3dCmdHeader *header)
1058 {
1059         struct vmw_dma_buffer *vmw_bo;
1060         struct vmw_query_cmd {
1061                 SVGA3dCmdHeader header;
1062                 SVGA3dCmdEndGBQuery q;
1063         } *cmd;
1064         int ret;
1065
1066         cmd = container_of(header, struct vmw_query_cmd, header);
1067         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1068         if (unlikely(ret != 0))
1069                 return ret;
1070
1071         ret = vmw_translate_mob_ptr(dev_priv, sw_context,
1072                                     &cmd->q.mobid,
1073                                     &vmw_bo);
1074         if (unlikely(ret != 0))
1075                 return ret;
1076
1077         ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context);
1078
1079         vmw_dmabuf_unreference(&vmw_bo);
1080         return ret;
1081 }
1082
1083 /**
1084  * vmw_cmd_end_query - validate a  SVGA_3D_CMD_END_QUERY command.
1085  *
1086  * @dev_priv: Pointer to a device private struct.
1087  * @sw_context: The software context used for this command submission.
1088  * @header: Pointer to the command header in the command stream.
1089  */
1090 static int vmw_cmd_end_query(struct vmw_private *dev_priv,
1091                              struct vmw_sw_context *sw_context,
1092                              SVGA3dCmdHeader *header)
1093 {
1094         struct vmw_dma_buffer *vmw_bo;
1095         struct vmw_query_cmd {
1096                 SVGA3dCmdHeader header;
1097                 SVGA3dCmdEndQuery q;
1098         } *cmd;
1099         int ret;
1100
1101         cmd = container_of(header, struct vmw_query_cmd, header);
1102         if (dev_priv->has_mob) {
1103                 struct {
1104                         SVGA3dCmdHeader header;
1105                         SVGA3dCmdEndGBQuery q;
1106                 } gb_cmd;
1107
1108                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1109
1110                 gb_cmd.header.id = SVGA_3D_CMD_END_GB_QUERY;
1111                 gb_cmd.header.size = cmd->header.size;
1112                 gb_cmd.q.cid = cmd->q.cid;
1113                 gb_cmd.q.type = cmd->q.type;
1114                 gb_cmd.q.mobid = cmd->q.guestResult.gmrId;
1115                 gb_cmd.q.offset = cmd->q.guestResult.offset;
1116
1117                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1118                 return vmw_cmd_end_gb_query(dev_priv, sw_context, header);
1119         }
1120
1121         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1122         if (unlikely(ret != 0))
1123                 return ret;
1124
1125         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1126                                       &cmd->q.guestResult,
1127                                       &vmw_bo);
1128         if (unlikely(ret != 0))
1129                 return ret;
1130
1131         ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context);
1132
1133         vmw_dmabuf_unreference(&vmw_bo);
1134         return ret;
1135 }
1136
1137 /**
1138  * vmw_cmd_wait_gb_query - validate a  SVGA_3D_CMD_WAIT_GB_QUERY command.
1139  *
1140  * @dev_priv: Pointer to a device private struct.
1141  * @sw_context: The software context used for this command submission.
1142  * @header: Pointer to the command header in the command stream.
1143  */
1144 static int vmw_cmd_wait_gb_query(struct vmw_private *dev_priv,
1145                                  struct vmw_sw_context *sw_context,
1146                                  SVGA3dCmdHeader *header)
1147 {
1148         struct vmw_dma_buffer *vmw_bo;
1149         struct vmw_query_cmd {
1150                 SVGA3dCmdHeader header;
1151                 SVGA3dCmdWaitForGBQuery q;
1152         } *cmd;
1153         int ret;
1154
1155         cmd = container_of(header, struct vmw_query_cmd, header);
1156         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1157         if (unlikely(ret != 0))
1158                 return ret;
1159
1160         ret = vmw_translate_mob_ptr(dev_priv, sw_context,
1161                                     &cmd->q.mobid,
1162                                     &vmw_bo);
1163         if (unlikely(ret != 0))
1164                 return ret;
1165
1166         vmw_dmabuf_unreference(&vmw_bo);
1167         return 0;
1168 }
1169
1170 /**
1171  * vmw_cmd_wait_query - validate a  SVGA_3D_CMD_WAIT_QUERY command.
1172  *
1173  * @dev_priv: Pointer to a device private struct.
1174  * @sw_context: The software context used for this command submission.
1175  * @header: Pointer to the command header in the command stream.
1176  */
1177 static int vmw_cmd_wait_query(struct vmw_private *dev_priv,
1178                               struct vmw_sw_context *sw_context,
1179                               SVGA3dCmdHeader *header)
1180 {
1181         struct vmw_dma_buffer *vmw_bo;
1182         struct vmw_query_cmd {
1183                 SVGA3dCmdHeader header;
1184                 SVGA3dCmdWaitForQuery q;
1185         } *cmd;
1186         int ret;
1187
1188         cmd = container_of(header, struct vmw_query_cmd, header);
1189         if (dev_priv->has_mob) {
1190                 struct {
1191                         SVGA3dCmdHeader header;
1192                         SVGA3dCmdWaitForGBQuery q;
1193                 } gb_cmd;
1194
1195                 BUG_ON(sizeof(gb_cmd) != sizeof(*cmd));
1196
1197                 gb_cmd.header.id = SVGA_3D_CMD_WAIT_FOR_GB_QUERY;
1198                 gb_cmd.header.size = cmd->header.size;
1199                 gb_cmd.q.cid = cmd->q.cid;
1200                 gb_cmd.q.type = cmd->q.type;
1201                 gb_cmd.q.mobid = cmd->q.guestResult.gmrId;
1202                 gb_cmd.q.offset = cmd->q.guestResult.offset;
1203
1204                 memcpy(cmd, &gb_cmd, sizeof(*cmd));
1205                 return vmw_cmd_wait_gb_query(dev_priv, sw_context, header);
1206         }
1207
1208         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1209         if (unlikely(ret != 0))
1210                 return ret;
1211
1212         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1213                                       &cmd->q.guestResult,
1214                                       &vmw_bo);
1215         if (unlikely(ret != 0))
1216                 return ret;
1217
1218         vmw_dmabuf_unreference(&vmw_bo);
1219         return 0;
1220 }
1221
1222 static int vmw_cmd_dma(struct vmw_private *dev_priv,
1223                        struct vmw_sw_context *sw_context,
1224                        SVGA3dCmdHeader *header)
1225 {
1226         struct vmw_dma_buffer *vmw_bo = NULL;
1227         struct vmw_surface *srf = NULL;
1228         struct vmw_dma_cmd {
1229                 SVGA3dCmdHeader header;
1230                 SVGA3dCmdSurfaceDMA dma;
1231         } *cmd;
1232         int ret;
1233         SVGA3dCmdSurfaceDMASuffix *suffix;
1234         uint32_t bo_size;
1235
1236         cmd = container_of(header, struct vmw_dma_cmd, header);
1237         suffix = (SVGA3dCmdSurfaceDMASuffix *)((unsigned long) &cmd->dma +
1238                                                header->size - sizeof(*suffix));
1239
1240         /* Make sure device and verifier stays in sync. */
1241         if (unlikely(suffix->suffixSize != sizeof(*suffix))) {
1242                 DRM_ERROR("Invalid DMA suffix size.\n");
1243                 return -EINVAL;
1244         }
1245
1246         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1247                                       &cmd->dma.guest.ptr,
1248                                       &vmw_bo);
1249         if (unlikely(ret != 0))
1250                 return ret;
1251
1252         /* Make sure DMA doesn't cross BO boundaries. */
1253         bo_size = vmw_bo->base.num_pages * PAGE_SIZE;
1254         if (unlikely(cmd->dma.guest.ptr.offset > bo_size)) {
1255                 DRM_ERROR("Invalid DMA offset.\n");
1256                 return -EINVAL;
1257         }
1258
1259         bo_size -= cmd->dma.guest.ptr.offset;
1260         if (unlikely(suffix->maximumOffset > bo_size))
1261                 suffix->maximumOffset = bo_size;
1262
1263         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1264                                 user_surface_converter, &cmd->dma.host.sid,
1265                                 NULL);
1266         if (unlikely(ret != 0)) {
1267                 if (unlikely(ret != -ERESTARTSYS))
1268                         DRM_ERROR("could not find surface for DMA.\n");
1269                 goto out_no_surface;
1270         }
1271
1272         srf = vmw_res_to_srf(sw_context->res_cache[vmw_res_surface].res);
1273
1274         vmw_kms_cursor_snoop(srf, sw_context->fp->tfile, &vmw_bo->base,
1275                              header);
1276
1277 out_no_surface:
1278         vmw_dmabuf_unreference(&vmw_bo);
1279         return ret;
1280 }
1281
1282 static int vmw_cmd_draw(struct vmw_private *dev_priv,
1283                         struct vmw_sw_context *sw_context,
1284                         SVGA3dCmdHeader *header)
1285 {
1286         struct vmw_draw_cmd {
1287                 SVGA3dCmdHeader header;
1288                 SVGA3dCmdDrawPrimitives body;
1289         } *cmd;
1290         SVGA3dVertexDecl *decl = (SVGA3dVertexDecl *)(
1291                 (unsigned long)header + sizeof(*cmd));
1292         SVGA3dPrimitiveRange *range;
1293         uint32_t i;
1294         uint32_t maxnum;
1295         int ret;
1296
1297         ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
1298         if (unlikely(ret != 0))
1299                 return ret;
1300
1301         cmd = container_of(header, struct vmw_draw_cmd, header);
1302         maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);
1303
1304         if (unlikely(cmd->body.numVertexDecls > maxnum)) {
1305                 DRM_ERROR("Illegal number of vertex declarations.\n");
1306                 return -EINVAL;
1307         }
1308
1309         for (i = 0; i < cmd->body.numVertexDecls; ++i, ++decl) {
1310                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1311                                         user_surface_converter,
1312                                         &decl->array.surfaceId, NULL);
1313                 if (unlikely(ret != 0))
1314                         return ret;
1315         }
1316
1317         maxnum = (header->size - sizeof(cmd->body) -
1318                   cmd->body.numVertexDecls * sizeof(*decl)) / sizeof(*range);
1319         if (unlikely(cmd->body.numRanges > maxnum)) {
1320                 DRM_ERROR("Illegal number of index ranges.\n");
1321                 return -EINVAL;
1322         }
1323
1324         range = (SVGA3dPrimitiveRange *) decl;
1325         for (i = 0; i < cmd->body.numRanges; ++i, ++range) {
1326                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1327                                         user_surface_converter,
1328                                         &range->indexArray.surfaceId, NULL);
1329                 if (unlikely(ret != 0))
1330                         return ret;
1331         }
1332         return 0;
1333 }
1334
1335
1336 static int vmw_cmd_tex_state(struct vmw_private *dev_priv,
1337                              struct vmw_sw_context *sw_context,
1338                              SVGA3dCmdHeader *header)
1339 {
1340         struct vmw_tex_state_cmd {
1341                 SVGA3dCmdHeader header;
1342                 SVGA3dCmdSetTextureState state;
1343         } *cmd;
1344
1345         SVGA3dTextureState *last_state = (SVGA3dTextureState *)
1346           ((unsigned long) header + header->size + sizeof(header));
1347         SVGA3dTextureState *cur_state = (SVGA3dTextureState *)
1348                 ((unsigned long) header + sizeof(struct vmw_tex_state_cmd));
1349         struct vmw_resource_val_node *ctx_node;
1350         struct vmw_resource_val_node *res_node;
1351         int ret;
1352
1353         cmd = container_of(header, struct vmw_tex_state_cmd,
1354                            header);
1355
1356         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1357                                 user_context_converter, &cmd->state.cid,
1358                                 &ctx_node);
1359         if (unlikely(ret != 0))
1360                 return ret;
1361
1362         for (; cur_state < last_state; ++cur_state) {
1363                 if (likely(cur_state->name != SVGA3D_TS_BIND_TEXTURE))
1364                         continue;
1365
1366                 ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1367                                         user_surface_converter,
1368                                         &cur_state->value, &res_node);
1369                 if (unlikely(ret != 0))
1370                         return ret;
1371
1372                 if (dev_priv->has_mob) {
1373                         struct vmw_ctx_bindinfo bi;
1374
1375                         bi.ctx = ctx_node->res;
1376                         bi.res = res_node ? res_node->res : NULL;
1377                         bi.bt = vmw_ctx_binding_tex;
1378                         bi.i1.texture_stage = cur_state->stage;
1379                         vmw_context_binding_add(ctx_node->staged_bindings,
1380                                                 &bi);
1381                 }
1382         }
1383
1384         return 0;
1385 }
1386
1387 static int vmw_cmd_check_define_gmrfb(struct vmw_private *dev_priv,
1388                                       struct vmw_sw_context *sw_context,
1389                                       void *buf)
1390 {
1391         struct vmw_dma_buffer *vmw_bo;
1392         int ret;
1393
1394         struct {
1395                 uint32_t header;
1396                 SVGAFifoCmdDefineGMRFB body;
1397         } *cmd = buf;
1398
1399         ret = vmw_translate_guest_ptr(dev_priv, sw_context,
1400                                       &cmd->body.ptr,
1401                                       &vmw_bo);
1402         if (unlikely(ret != 0))
1403                 return ret;
1404
1405         vmw_dmabuf_unreference(&vmw_bo);
1406
1407         return ret;
1408 }
1409
1410 /**
1411  * vmw_cmd_switch_backup - Utility function to handle backup buffer switching
1412  *
1413  * @dev_priv: Pointer to a device private struct.
1414  * @sw_context: The software context being used for this batch.
1415  * @res_type: The resource type.
1416  * @converter: Information about user-space binding for this resource type.
1417  * @res_id: Pointer to the user-space resource handle in the command stream.
1418  * @buf_id: Pointer to the user-space backup buffer handle in the command
1419  * stream.
1420  * @backup_offset: Offset of backup into MOB.
1421  *
1422  * This function prepares for registering a switch of backup buffers
1423  * in the resource metadata just prior to unreserving.
1424  */
1425 static int vmw_cmd_switch_backup(struct vmw_private *dev_priv,
1426                                  struct vmw_sw_context *sw_context,
1427                                  enum vmw_res_type res_type,
1428                                  const struct vmw_user_resource_conv
1429                                  *converter,
1430                                  uint32_t *res_id,
1431                                  uint32_t *buf_id,
1432                                  unsigned long backup_offset)
1433 {
1434         int ret;
1435         struct vmw_dma_buffer *dma_buf;
1436         struct vmw_resource_val_node *val_node;
1437
1438         ret = vmw_cmd_res_check(dev_priv, sw_context, res_type,
1439                                 converter, res_id, &val_node);
1440         if (unlikely(ret != 0))
1441                 return ret;
1442
1443         ret = vmw_translate_mob_ptr(dev_priv, sw_context, buf_id, &dma_buf);
1444         if (unlikely(ret != 0))
1445                 return ret;
1446
1447         if (val_node->first_usage)
1448                 val_node->no_buffer_needed = true;
1449
1450         vmw_dmabuf_unreference(&val_node->new_backup);
1451         val_node->new_backup = dma_buf;
1452         val_node->new_backup_offset = backup_offset;
1453
1454         return 0;
1455 }
1456
1457 /**
1458  * vmw_cmd_bind_gb_surface - Validate an SVGA_3D_CMD_BIND_GB_SURFACE
1459  * command
1460  *
1461  * @dev_priv: Pointer to a device private struct.
1462  * @sw_context: The software context being used for this batch.
1463  * @header: Pointer to the command header in the command stream.
1464  */
1465 static int vmw_cmd_bind_gb_surface(struct vmw_private *dev_priv,
1466                                    struct vmw_sw_context *sw_context,
1467                                    SVGA3dCmdHeader *header)
1468 {
1469         struct vmw_bind_gb_surface_cmd {
1470                 SVGA3dCmdHeader header;
1471                 SVGA3dCmdBindGBSurface body;
1472         } *cmd;
1473
1474         cmd = container_of(header, struct vmw_bind_gb_surface_cmd, header);
1475
1476         return vmw_cmd_switch_backup(dev_priv, sw_context, vmw_res_surface,
1477                                      user_surface_converter,
1478                                      &cmd->body.sid, &cmd->body.mobid,
1479                                      0);
1480 }
1481
1482 /**
1483  * vmw_cmd_update_gb_image - Validate an SVGA_3D_CMD_UPDATE_GB_IMAGE
1484  * command
1485  *
1486  * @dev_priv: Pointer to a device private struct.
1487  * @sw_context: The software context being used for this batch.
1488  * @header: Pointer to the command header in the command stream.
1489  */
1490 static int vmw_cmd_update_gb_image(struct vmw_private *dev_priv,
1491                                    struct vmw_sw_context *sw_context,
1492                                    SVGA3dCmdHeader *header)
1493 {
1494         struct vmw_gb_surface_cmd {
1495                 SVGA3dCmdHeader header;
1496                 SVGA3dCmdUpdateGBImage body;
1497         } *cmd;
1498
1499         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1500
1501         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1502                                  user_surface_converter,
1503                                  &cmd->body.image.sid, NULL);
1504 }
1505
1506 /**
1507  * vmw_cmd_update_gb_surface - Validate an SVGA_3D_CMD_UPDATE_GB_SURFACE
1508  * command
1509  *
1510  * @dev_priv: Pointer to a device private struct.
1511  * @sw_context: The software context being used for this batch.
1512  * @header: Pointer to the command header in the command stream.
1513  */
1514 static int vmw_cmd_update_gb_surface(struct vmw_private *dev_priv,
1515                                      struct vmw_sw_context *sw_context,
1516                                      SVGA3dCmdHeader *header)
1517 {
1518         struct vmw_gb_surface_cmd {
1519                 SVGA3dCmdHeader header;
1520                 SVGA3dCmdUpdateGBSurface body;
1521         } *cmd;
1522
1523         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1524
1525         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1526                                  user_surface_converter,
1527                                  &cmd->body.sid, NULL);
1528 }
1529
1530 /**
1531  * vmw_cmd_readback_gb_image - Validate an SVGA_3D_CMD_READBACK_GB_IMAGE
1532  * command
1533  *
1534  * @dev_priv: Pointer to a device private struct.
1535  * @sw_context: The software context being used for this batch.
1536  * @header: Pointer to the command header in the command stream.
1537  */
1538 static int vmw_cmd_readback_gb_image(struct vmw_private *dev_priv,
1539                                      struct vmw_sw_context *sw_context,
1540                                      SVGA3dCmdHeader *header)
1541 {
1542         struct vmw_gb_surface_cmd {
1543                 SVGA3dCmdHeader header;
1544                 SVGA3dCmdReadbackGBImage body;
1545         } *cmd;
1546
1547         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1548
1549         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1550                                  user_surface_converter,
1551                                  &cmd->body.image.sid, NULL);
1552 }
1553
1554 /**
1555  * vmw_cmd_readback_gb_surface - Validate an SVGA_3D_CMD_READBACK_GB_SURFACE
1556  * command
1557  *
1558  * @dev_priv: Pointer to a device private struct.
1559  * @sw_context: The software context being used for this batch.
1560  * @header: Pointer to the command header in the command stream.
1561  */
1562 static int vmw_cmd_readback_gb_surface(struct vmw_private *dev_priv,
1563                                        struct vmw_sw_context *sw_context,
1564                                        SVGA3dCmdHeader *header)
1565 {
1566         struct vmw_gb_surface_cmd {
1567                 SVGA3dCmdHeader header;
1568                 SVGA3dCmdReadbackGBSurface body;
1569         } *cmd;
1570
1571         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1572
1573         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1574                                  user_surface_converter,
1575                                  &cmd->body.sid, NULL);
1576 }
1577
1578 /**
1579  * vmw_cmd_invalidate_gb_image - Validate an SVGA_3D_CMD_INVALIDATE_GB_IMAGE
1580  * command
1581  *
1582  * @dev_priv: Pointer to a device private struct.
1583  * @sw_context: The software context being used for this batch.
1584  * @header: Pointer to the command header in the command stream.
1585  */
1586 static int vmw_cmd_invalidate_gb_image(struct vmw_private *dev_priv,
1587                                        struct vmw_sw_context *sw_context,
1588                                        SVGA3dCmdHeader *header)
1589 {
1590         struct vmw_gb_surface_cmd {
1591                 SVGA3dCmdHeader header;
1592                 SVGA3dCmdInvalidateGBImage body;
1593         } *cmd;
1594
1595         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1596
1597         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1598                                  user_surface_converter,
1599                                  &cmd->body.image.sid, NULL);
1600 }
1601
1602 /**
1603  * vmw_cmd_invalidate_gb_surface - Validate an
1604  * SVGA_3D_CMD_INVALIDATE_GB_SURFACE command
1605  *
1606  * @dev_priv: Pointer to a device private struct.
1607  * @sw_context: The software context being used for this batch.
1608  * @header: Pointer to the command header in the command stream.
1609  */
1610 static int vmw_cmd_invalidate_gb_surface(struct vmw_private *dev_priv,
1611                                          struct vmw_sw_context *sw_context,
1612                                          SVGA3dCmdHeader *header)
1613 {
1614         struct vmw_gb_surface_cmd {
1615                 SVGA3dCmdHeader header;
1616                 SVGA3dCmdInvalidateGBSurface body;
1617         } *cmd;
1618
1619         cmd = container_of(header, struct vmw_gb_surface_cmd, header);
1620
1621         return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
1622                                  user_surface_converter,
1623                                  &cmd->body.sid, NULL);
1624 }
1625
1626
1627 /**
1628  * vmw_cmd_shader_define - Validate an SVGA_3D_CMD_SHADER_DEFINE
1629  * command
1630  *
1631  * @dev_priv: Pointer to a device private struct.
1632  * @sw_context: The software context being used for this batch.
1633  * @header: Pointer to the command header in the command stream.
1634  */
1635 static int vmw_cmd_shader_define(struct vmw_private *dev_priv,
1636                                  struct vmw_sw_context *sw_context,
1637                                  SVGA3dCmdHeader *header)
1638 {
1639         struct vmw_shader_define_cmd {
1640                 SVGA3dCmdHeader header;
1641                 SVGA3dCmdDefineShader body;
1642         } *cmd;
1643         int ret;
1644         size_t size;
1645         struct vmw_resource_val_node *val;
1646
1647         cmd = container_of(header, struct vmw_shader_define_cmd,
1648                            header);
1649
1650         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1651                                 user_context_converter, &cmd->body.cid,
1652                                 &val);
1653         if (unlikely(ret != 0))
1654                 return ret;
1655
1656         if (unlikely(!dev_priv->has_mob))
1657                 return 0;
1658
1659         size = cmd->header.size - sizeof(cmd->body);
1660         ret = vmw_compat_shader_add(dev_priv,
1661                                     vmw_context_res_man(val->res),
1662                                     cmd->body.shid, cmd + 1,
1663                                     cmd->body.type, size,
1664                                     &sw_context->staged_cmd_res);
1665         if (unlikely(ret != 0))
1666                 return ret;
1667
1668         return vmw_resource_relocation_add(&sw_context->res_relocations,
1669                                            NULL, &cmd->header.id -
1670                                            sw_context->buf_start);
1671
1672         return 0;
1673 }
1674
1675 /**
1676  * vmw_cmd_shader_destroy - Validate an SVGA_3D_CMD_SHADER_DESTROY
1677  * command
1678  *
1679  * @dev_priv: Pointer to a device private struct.
1680  * @sw_context: The software context being used for this batch.
1681  * @header: Pointer to the command header in the command stream.
1682  */
1683 static int vmw_cmd_shader_destroy(struct vmw_private *dev_priv,
1684                                   struct vmw_sw_context *sw_context,
1685                                   SVGA3dCmdHeader *header)
1686 {
1687         struct vmw_shader_destroy_cmd {
1688                 SVGA3dCmdHeader header;
1689                 SVGA3dCmdDestroyShader body;
1690         } *cmd;
1691         int ret;
1692         struct vmw_resource_val_node *val;
1693
1694         cmd = container_of(header, struct vmw_shader_destroy_cmd,
1695                            header);
1696
1697         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1698                                 user_context_converter, &cmd->body.cid,
1699                                 &val);
1700         if (unlikely(ret != 0))
1701                 return ret;
1702
1703         if (unlikely(!dev_priv->has_mob))
1704                 return 0;
1705
1706         ret = vmw_compat_shader_remove(vmw_context_res_man(val->res),
1707                                        cmd->body.shid,
1708                                        cmd->body.type,
1709                                        &sw_context->staged_cmd_res);
1710         if (unlikely(ret != 0))
1711                 return ret;
1712
1713         return vmw_resource_relocation_add(&sw_context->res_relocations,
1714                                            NULL, &cmd->header.id -
1715                                            sw_context->buf_start);
1716
1717         return 0;
1718 }
1719
1720 /**
1721  * vmw_cmd_set_shader - Validate an SVGA_3D_CMD_SET_SHADER
1722  * command
1723  *
1724  * @dev_priv: Pointer to a device private struct.
1725  * @sw_context: The software context being used for this batch.
1726  * @header: Pointer to the command header in the command stream.
1727  */
1728 static int vmw_cmd_set_shader(struct vmw_private *dev_priv,
1729                               struct vmw_sw_context *sw_context,
1730                               SVGA3dCmdHeader *header)
1731 {
1732         struct vmw_set_shader_cmd {
1733                 SVGA3dCmdHeader header;
1734                 SVGA3dCmdSetShader body;
1735         } *cmd;
1736         struct vmw_resource_val_node *ctx_node, *res_node = NULL;
1737         struct vmw_ctx_bindinfo bi;
1738         struct vmw_resource *res = NULL;
1739         int ret;
1740
1741         cmd = container_of(header, struct vmw_set_shader_cmd,
1742                            header);
1743
1744         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1745                                 user_context_converter, &cmd->body.cid,
1746                                 &ctx_node);
1747         if (unlikely(ret != 0))
1748                 return ret;
1749
1750         if (!dev_priv->has_mob)
1751                 return 0;
1752
1753         if (cmd->body.shid != SVGA3D_INVALID_ID) {
1754                 res = vmw_compat_shader_lookup
1755                         (vmw_context_res_man(ctx_node->res),
1756                          cmd->body.shid,
1757                          cmd->body.type);
1758
1759                 if (!IS_ERR(res)) {
1760                         ret = vmw_cmd_res_reloc_add(dev_priv, sw_context,
1761                                                     vmw_res_shader,
1762                                                     &cmd->body.shid, res,
1763                                                     &res_node);
1764                         vmw_resource_unreference(&res);
1765                         if (unlikely(ret != 0))
1766                                 return ret;
1767                 }
1768         }
1769
1770         if (!res_node) {
1771                 ret = vmw_cmd_res_check(dev_priv, sw_context,
1772                                         vmw_res_shader,
1773                                         user_shader_converter,
1774                                         &cmd->body.shid, &res_node);
1775                 if (unlikely(ret != 0))
1776                         return ret;
1777         }
1778
1779         bi.ctx = ctx_node->res;
1780         bi.res = res_node ? res_node->res : NULL;
1781         bi.bt = vmw_ctx_binding_shader;
1782         bi.i1.shader_type = cmd->body.type;
1783         return vmw_context_binding_add(ctx_node->staged_bindings, &bi);
1784 }
1785
1786 /**
1787  * vmw_cmd_set_shader_const - Validate an SVGA_3D_CMD_SET_SHADER_CONST
1788  * command
1789  *
1790  * @dev_priv: Pointer to a device private struct.
1791  * @sw_context: The software context being used for this batch.
1792  * @header: Pointer to the command header in the command stream.
1793  */
1794 static int vmw_cmd_set_shader_const(struct vmw_private *dev_priv,
1795                                     struct vmw_sw_context *sw_context,
1796                                     SVGA3dCmdHeader *header)
1797 {
1798         struct vmw_set_shader_const_cmd {
1799                 SVGA3dCmdHeader header;
1800                 SVGA3dCmdSetShaderConst body;
1801         } *cmd;
1802         int ret;
1803
1804         cmd = container_of(header, struct vmw_set_shader_const_cmd,
1805                            header);
1806
1807         ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
1808                                 user_context_converter, &cmd->body.cid,
1809                                 NULL);
1810         if (unlikely(ret != 0))
1811                 return ret;
1812
1813         if (dev_priv->has_mob)
1814                 header->id = SVGA_3D_CMD_SET_GB_SHADERCONSTS_INLINE;
1815
1816         return 0;
1817 }
1818
1819 /**
1820  * vmw_cmd_bind_gb_shader - Validate an SVGA_3D_CMD_BIND_GB_SHADER
1821  * command
1822  *
1823  * @dev_priv: Pointer to a device private struct.
1824  * @sw_context: The software context being used for this batch.
1825  * @header: Pointer to the command header in the command stream.
1826  */
1827 static int vmw_cmd_bind_gb_shader(struct vmw_private *dev_priv,
1828                                   struct vmw_sw_context *sw_context,
1829                                   SVGA3dCmdHeader *header)
1830 {
1831         struct vmw_bind_gb_shader_cmd {
1832                 SVGA3dCmdHeader header;
1833                 SVGA3dCmdBindGBShader body;
1834         } *cmd;
1835
1836         cmd = container_of(header, struct vmw_bind_gb_shader_cmd,
1837                            header);
1838
1839         return vmw_cmd_switch_backup(dev_priv, sw_context, vmw_res_shader,
1840                                      user_shader_converter,
1841                                      &cmd->body.shid, &cmd->body.mobid,
1842                                      cmd->body.offsetInBytes);
1843 }
1844
1845 static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv,
1846                                 struct vmw_sw_context *sw_context,
1847                                 void *buf, uint32_t *size)
1848 {
1849         uint32_t size_remaining = *size;
1850         uint32_t cmd_id;
1851
1852         cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
1853         switch (cmd_id) {
1854         case SVGA_CMD_UPDATE:
1855                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdUpdate);
1856                 break;
1857         case SVGA_CMD_DEFINE_GMRFB:
1858                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdDefineGMRFB);
1859                 break;
1860         case SVGA_CMD_BLIT_GMRFB_TO_SCREEN:
1861                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
1862                 break;
1863         case SVGA_CMD_BLIT_SCREEN_TO_GMRFB:
1864                 *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
1865                 break;
1866         default:
1867                 DRM_ERROR("Unsupported SVGA command: %u.\n", cmd_id);
1868                 return -EINVAL;
1869         }
1870
1871         if (*size > size_remaining) {
1872                 DRM_ERROR("Invalid SVGA command (size mismatch):"
1873                           " %u.\n", cmd_id);
1874                 return -EINVAL;
1875         }
1876
1877         if (unlikely(!sw_context->kernel)) {
1878                 DRM_ERROR("Kernel only SVGA command: %u.\n", cmd_id);
1879                 return -EPERM;
1880         }
1881
1882         if (cmd_id == SVGA_CMD_DEFINE_GMRFB)
1883                 return vmw_cmd_check_define_gmrfb(dev_priv, sw_context, buf);
1884
1885         return 0;
1886 }
1887
1888 static const struct vmw_cmd_entry vmw_cmd_entries[SVGA_3D_CMD_MAX] = {
1889         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE, &vmw_cmd_invalid,
1890                     false, false, false),
1891         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DESTROY, &vmw_cmd_invalid,
1892                     false, false, false),
1893         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_COPY, &vmw_cmd_surface_copy_check,
1894                     true, false, false),
1895         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_STRETCHBLT, &vmw_cmd_stretch_blt_check,
1896                     true, false, false),
1897         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DMA, &vmw_cmd_dma,
1898                     true, false, false),
1899         VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DEFINE, &vmw_cmd_invalid,
1900                     false, false, false),
1901         VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DESTROY, &vmw_cmd_invalid,
1902                     false, false, false),
1903         VMW_CMD_DEF(SVGA_3D_CMD_SETTRANSFORM, &vmw_cmd_cid_check,
1904                     true, false, false),
1905         VMW_CMD_DEF(SVGA_3D_CMD_SETZRANGE, &vmw_cmd_cid_check,
1906                     true, false, false),
1907         VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERSTATE, &vmw_cmd_cid_check,
1908                     true, false, false),
1909         VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERTARGET,
1910                     &vmw_cmd_set_render_target_check, true, false, false),
1911         VMW_CMD_DEF(SVGA_3D_CMD_SETTEXTURESTATE, &vmw_cmd_tex_state,
1912                     true, false, false),
1913         VMW_CMD_DEF(SVGA_3D_CMD_SETMATERIAL, &vmw_cmd_cid_check,
1914                     true, false, false),
1915         VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTDATA, &vmw_cmd_cid_check,
1916                     true, false, false),
1917         VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTENABLED, &vmw_cmd_cid_check,
1918                     true, false, false),
1919         VMW_CMD_DEF(SVGA_3D_CMD_SETVIEWPORT, &vmw_cmd_cid_check,
1920                     true, false, false),
1921         VMW_CMD_DEF(SVGA_3D_CMD_SETCLIPPLANE, &vmw_cmd_cid_check,
1922                     true, false, false),
1923         VMW_CMD_DEF(SVGA_3D_CMD_CLEAR, &vmw_cmd_cid_check,
1924                     true, false, false),
1925         VMW_CMD_DEF(SVGA_3D_CMD_PRESENT, &vmw_cmd_present_check,
1926                     false, false, false),
1927         VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DEFINE, &vmw_cmd_shader_define,
1928                     true, false, false),
1929         VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DESTROY, &vmw_cmd_shader_destroy,
1930                     true, false, false),
1931         VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER, &vmw_cmd_set_shader,
1932                     true, false, false),
1933         VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER_CONST, &vmw_cmd_set_shader_const,
1934                     true, false, false),
1935         VMW_CMD_DEF(SVGA_3D_CMD_DRAW_PRIMITIVES, &vmw_cmd_draw,
1936                     true, false, false),
1937         VMW_CMD_DEF(SVGA_3D_CMD_SETSCISSORRECT, &vmw_cmd_cid_check,
1938                     true, false, false),
1939         VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_QUERY, &vmw_cmd_begin_query,
1940                     true, false, false),
1941         VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_end_query,
1942                     true, false, false),
1943         VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_wait_query,
1944                     true, false, false),
1945         VMW_CMD_DEF(SVGA_3D_CMD_PRESENT_READBACK, &vmw_cmd_ok,
1946                     true, false, false),
1947         VMW_CMD_DEF(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN,
1948                     &vmw_cmd_blt_surf_screen_check, false, false, false),
1949         VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE_V2, &vmw_cmd_invalid,
1950                     false, false, false),
1951         VMW_CMD_DEF(SVGA_3D_CMD_GENERATE_MIPMAPS, &vmw_cmd_invalid,
1952                     false, false, false),
1953         VMW_CMD_DEF(SVGA_3D_CMD_ACTIVATE_SURFACE, &vmw_cmd_invalid,
1954                     false, false, false),
1955         VMW_CMD_DEF(SVGA_3D_CMD_DEACTIVATE_SURFACE, &vmw_cmd_invalid,
1956                     false, false, false),
1957         VMW_CMD_DEF(SVGA_3D_CMD_SCREEN_DMA, &vmw_cmd_invalid,
1958                     false, false, false),
1959         VMW_CMD_DEF(SVGA_3D_CMD_SET_UNITY_SURFACE_COOKIE, &vmw_cmd_invalid,
1960                     false, false, false),
1961         VMW_CMD_DEF(SVGA_3D_CMD_OPEN_CONTEXT_SURFACE, &vmw_cmd_invalid,
1962                     false, false, false),
1963         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_BITBLT, &vmw_cmd_invalid,
1964                     false, false, false),
1965         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_TRANSBLT, &vmw_cmd_invalid,
1966                     false, false, false),
1967         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_STRETCHBLT, &vmw_cmd_invalid,
1968                     false, false, false),
1969         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_COLORFILL, &vmw_cmd_invalid,
1970                     false, false, false),
1971         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_ALPHABLEND, &vmw_cmd_invalid,
1972                     false, false, false),
1973         VMW_CMD_DEF(SVGA_3D_CMD_LOGICOPS_CLEARTYPEBLEND, &vmw_cmd_invalid,
1974                     false, false, false),
1975         VMW_CMD_DEF(SVGA_3D_CMD_SET_OTABLE_BASE, &vmw_cmd_invalid,
1976                     false, false, true),
1977         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_OTABLE, &vmw_cmd_invalid,
1978                     false, false, true),
1979         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_MOB, &vmw_cmd_invalid,
1980                     false, false, true),
1981         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_MOB, &vmw_cmd_invalid,
1982                     false, false, true),
1983         VMW_CMD_DEF(SVGA_3D_CMD_REDEFINE_GB_MOB, &vmw_cmd_invalid,
1984                     false, false, true),
1985         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_MOB_MAPPING, &vmw_cmd_invalid,
1986                     false, false, true),
1987         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SURFACE, &vmw_cmd_invalid,
1988                     false, false, true),
1989         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SURFACE, &vmw_cmd_invalid,
1990                     false, false, true),
1991         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SURFACE, &vmw_cmd_bind_gb_surface,
1992                     true, false, true),
1993         VMW_CMD_DEF(SVGA_3D_CMD_COND_BIND_GB_SURFACE, &vmw_cmd_invalid,
1994                     false, false, true),
1995         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_IMAGE, &vmw_cmd_update_gb_image,
1996                     true, false, true),
1997         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_SURFACE,
1998                     &vmw_cmd_update_gb_surface, true, false, true),
1999         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_IMAGE,
2000                     &vmw_cmd_readback_gb_image, true, false, true),
2001         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_SURFACE,
2002                     &vmw_cmd_readback_gb_surface, true, false, true),
2003         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_IMAGE,
2004                     &vmw_cmd_invalidate_gb_image, true, false, true),
2005         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_SURFACE,
2006                     &vmw_cmd_invalidate_gb_surface, true, false, true),
2007         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_CONTEXT, &vmw_cmd_invalid,
2008                     false, false, true),
2009         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_CONTEXT, &vmw_cmd_invalid,
2010                     false, false, true),
2011         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_CONTEXT, &vmw_cmd_invalid,
2012                     false, false, true),
2013         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_CONTEXT, &vmw_cmd_invalid,
2014                     false, false, true),
2015         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_CONTEXT, &vmw_cmd_invalid,
2016                     false, false, true),
2017         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SHADER, &vmw_cmd_invalid,
2018                     false, false, true),
2019         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SHADER, &vmw_cmd_bind_gb_shader,
2020                     true, false, true),
2021         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SHADER, &vmw_cmd_invalid,
2022                     false, false, true),
2023         VMW_CMD_DEF(SVGA_3D_CMD_SET_OTABLE_BASE64, &vmw_cmd_invalid,
2024                     false, false, false),
2025         VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_GB_QUERY, &vmw_cmd_begin_gb_query,
2026                     true, false, true),
2027         VMW_CMD_DEF(SVGA_3D_CMD_END_GB_QUERY, &vmw_cmd_end_gb_query,
2028                     true, false, true),
2029         VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_GB_QUERY, &vmw_cmd_wait_gb_query,
2030                     true, false, true),
2031         VMW_CMD_DEF(SVGA_3D_CMD_NOP, &vmw_cmd_ok,
2032                     true, false, true),
2033         VMW_CMD_DEF(SVGA_3D_CMD_ENABLE_GART, &vmw_cmd_invalid,
2034                     false, false, true),
2035         VMW_CMD_DEF(SVGA_3D_CMD_DISABLE_GART, &vmw_cmd_invalid,
2036                     false, false, true),
2037         VMW_CMD_DEF(SVGA_3D_CMD_MAP_MOB_INTO_GART, &vmw_cmd_invalid,
2038                     false, false, true),
2039         VMW_CMD_DEF(SVGA_3D_CMD_UNMAP_GART_RANGE, &vmw_cmd_invalid,
2040                     false, false, true),
2041         VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SCREENTARGET, &vmw_cmd_invalid,
2042                     false, false, true),
2043         VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_SCREENTARGET, &vmw_cmd_invalid,
2044                     false, false, true),
2045         VMW_CMD_DEF(SVGA_3D_CMD_BIND_GB_SCREENTARGET, &vmw_cmd_invalid,
2046                     false, false, true),
2047         VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_SCREENTARGET, &vmw_cmd_invalid,
2048                     false, false, true),
2049         VMW_CMD_DEF(SVGA_3D_CMD_READBACK_GB_IMAGE_PARTIAL, &vmw_cmd_invalid,
2050                     false, false, true),
2051         VMW_CMD_DEF(SVGA_3D_CMD_INVALIDATE_GB_IMAGE_PARTIAL, &vmw_cmd_invalid,
2052                     false, false, true),
2053         VMW_CMD_DEF(SVGA_3D_CMD_SET_GB_SHADERCONSTS_INLINE, &vmw_cmd_cid_check,
2054                     true, false, true)
2055 };
2056
2057 static int vmw_cmd_check(struct vmw_private *dev_priv,
2058                          struct vmw_sw_context *sw_context,
2059                          void *buf, uint32_t *size)
2060 {
2061         uint32_t cmd_id;
2062         uint32_t size_remaining = *size;
2063         SVGA3dCmdHeader *header = (SVGA3dCmdHeader *) buf;
2064         int ret;
2065         const struct vmw_cmd_entry *entry;
2066         bool gb = dev_priv->capabilities & SVGA_CAP_GBOBJECTS;
2067
2068         cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
2069         /* Handle any none 3D commands */
2070         if (unlikely(cmd_id < SVGA_CMD_MAX))
2071                 return vmw_cmd_check_not_3d(dev_priv, sw_context, buf, size);
2072
2073
2074         cmd_id = le32_to_cpu(header->id);
2075         *size = le32_to_cpu(header->size) + sizeof(SVGA3dCmdHeader);
2076
2077         cmd_id -= SVGA_3D_CMD_BASE;
2078         if (unlikely(*size > size_remaining))
2079                 goto out_invalid;
2080
2081         if (unlikely(cmd_id >= SVGA_3D_CMD_MAX - SVGA_3D_CMD_BASE))
2082                 goto out_invalid;
2083
2084         entry = &vmw_cmd_entries[cmd_id];
2085         if (unlikely(!entry->func))
2086                 goto out_invalid;
2087
2088         if (unlikely(!entry->user_allow && !sw_context->kernel))
2089                 goto out_privileged;
2090
2091         if (unlikely(entry->gb_disable && gb))
2092                 goto out_old;
2093
2094         if (unlikely(entry->gb_enable && !gb))
2095                 goto out_new;
2096
2097         ret = entry->func(dev_priv, sw_context, header);
2098         if (unlikely(ret != 0))
2099                 goto out_invalid;
2100
2101         return 0;
2102 out_invalid:
2103         DRM_ERROR("Invalid SVGA3D command: %d\n",
2104                   cmd_id + SVGA_3D_CMD_BASE);
2105         return -EINVAL;
2106 out_privileged:
2107         DRM_ERROR("Privileged SVGA3D command: %d\n",
2108                   cmd_id + SVGA_3D_CMD_BASE);
2109         return -EPERM;
2110 out_old:
2111         DRM_ERROR("Deprecated (disallowed) SVGA3D command: %d\n",
2112                   cmd_id + SVGA_3D_CMD_BASE);
2113         return -EINVAL;
2114 out_new:
2115         DRM_ERROR("SVGA3D command: %d not supported by virtual hardware.\n",
2116                   cmd_id + SVGA_3D_CMD_BASE);
2117         return -EINVAL;
2118 }
2119
2120 static int vmw_cmd_check_all(struct vmw_private *dev_priv,
2121                              struct vmw_sw_context *sw_context,
2122                              void *buf,
2123                              uint32_t size)
2124 {
2125         int32_t cur_size = size;
2126         int ret;
2127
2128         sw_context->buf_start = buf;
2129
2130         while (cur_size > 0) {
2131                 size = cur_size;
2132                 ret = vmw_cmd_check(dev_priv, sw_context, buf, &size);
2133                 if (unlikely(ret != 0))
2134                         return ret;
2135                 buf = (void *)((unsigned long) buf + size);
2136                 cur_size -= size;
2137         }
2138
2139         if (unlikely(cur_size != 0)) {
2140                 DRM_ERROR("Command verifier out of sync.\n");
2141                 return -EINVAL;
2142         }
2143
2144         return 0;
2145 }
2146
2147 static void vmw_free_relocations(struct vmw_sw_context *sw_context)
2148 {
2149         sw_context->cur_reloc = 0;
2150 }
2151
2152 static void vmw_apply_relocations(struct vmw_sw_context *sw_context)
2153 {
2154         uint32_t i;
2155         struct vmw_relocation *reloc;
2156         struct ttm_validate_buffer *validate;
2157         struct ttm_buffer_object *bo;
2158
2159         for (i = 0; i < sw_context->cur_reloc; ++i) {
2160                 reloc = &sw_context->relocs[i];
2161                 validate = &sw_context->val_bufs[reloc->index].base;
2162                 bo = validate->bo;
2163                 switch (bo->mem.mem_type) {
2164                 case TTM_PL_VRAM:
2165                         reloc->location->offset += bo->offset;
2166                         reloc->location->gmrId = SVGA_GMR_FRAMEBUFFER;
2167                         break;
2168                 case VMW_PL_GMR:
2169                         reloc->location->gmrId = bo->mem.start;
2170                         break;
2171                 case VMW_PL_MOB:
2172                         *reloc->mob_loc = bo->mem.start;
2173                         break;
2174                 default:
2175                         BUG();
2176                 }
2177         }
2178         vmw_free_relocations(sw_context);
2179 }
2180
2181 /**
2182  * vmw_resource_list_unrefererence - Free up a resource list and unreference
2183  * all resources referenced by it.
2184  *
2185  * @list: The resource list.
2186  */
2187 static void vmw_resource_list_unreference(struct list_head *list)
2188 {
2189         struct vmw_resource_val_node *val, *val_next;
2190
2191         /*
2192          * Drop references to resources held during command submission.
2193          */
2194
2195         list_for_each_entry_safe(val, val_next, list, head) {
2196                 list_del_init(&val->head);
2197                 vmw_resource_unreference(&val->res);
2198                 if (unlikely(val->staged_bindings))
2199                         kfree(val->staged_bindings);
2200                 kfree(val);
2201         }
2202 }
2203
2204 static void vmw_clear_validations(struct vmw_sw_context *sw_context)
2205 {
2206         struct vmw_validate_buffer *entry, *next;
2207         struct vmw_resource_val_node *val;
2208
2209         /*
2210          * Drop references to DMA buffers held during command submission.
2211          */
2212         list_for_each_entry_safe(entry, next, &sw_context->validate_nodes,
2213                                  base.head) {
2214                 list_del(&entry->base.head);
2215                 ttm_bo_unref(&entry->base.bo);
2216                 (void) drm_ht_remove_item(&sw_context->res_ht, &entry->hash);
2217                 sw_context->cur_val_buf--;
2218         }
2219         BUG_ON(sw_context->cur_val_buf != 0);
2220
2221         list_for_each_entry(val, &sw_context->resource_list, head)
2222                 (void) drm_ht_remove_item(&sw_context->res_ht, &val->hash);
2223 }
2224
2225 static int vmw_validate_single_buffer(struct vmw_private *dev_priv,
2226                                       struct ttm_buffer_object *bo,
2227                                       bool validate_as_mob)
2228 {
2229         int ret;
2230
2231
2232         /*
2233          * Don't validate pinned buffers.
2234          */
2235
2236         if (bo == dev_priv->pinned_bo ||
2237             (bo == dev_priv->dummy_query_bo &&
2238              dev_priv->dummy_query_bo_pinned))
2239                 return 0;
2240
2241         if (validate_as_mob)
2242                 return ttm_bo_validate(bo, &vmw_mob_placement, true, false);
2243
2244         /**
2245          * Put BO in VRAM if there is space, otherwise as a GMR.
2246          * If there is no space in VRAM and GMR ids are all used up,
2247          * start evicting GMRs to make room. If the DMA buffer can't be
2248          * used as a GMR, this will return -ENOMEM.
2249          */
2250
2251         ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, true, false);
2252         if (likely(ret == 0 || ret == -ERESTARTSYS))
2253                 return ret;
2254
2255         /**
2256          * If that failed, try VRAM again, this time evicting
2257          * previous contents.
2258          */
2259
2260         DRM_INFO("Falling through to VRAM.\n");
2261         ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false);
2262         return ret;
2263 }
2264
2265 static int vmw_validate_buffers(struct vmw_private *dev_priv,
2266                                 struct vmw_sw_context *sw_context)
2267 {
2268         struct vmw_validate_buffer *entry;
2269         int ret;
2270
2271         list_for_each_entry(entry, &sw_context->validate_nodes, base.head) {
2272                 ret = vmw_validate_single_buffer(dev_priv, entry->base.bo,
2273                                                  entry->validate_as_mob);
2274                 if (unlikely(ret != 0))
2275                         return ret;
2276         }
2277         return 0;
2278 }
2279
2280 static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context,
2281                                  uint32_t size)
2282 {
2283         if (likely(sw_context->cmd_bounce_size >= size))
2284                 return 0;
2285
2286         if (sw_context->cmd_bounce_size == 0)
2287                 sw_context->cmd_bounce_size = VMWGFX_CMD_BOUNCE_INIT_SIZE;
2288
2289         while (sw_context->cmd_bounce_size < size) {
2290                 sw_context->cmd_bounce_size =
2291                         PAGE_ALIGN(sw_context->cmd_bounce_size +
2292                                    (sw_context->cmd_bounce_size >> 1));
2293         }
2294
2295         if (sw_context->cmd_bounce != NULL)
2296                 vfree(sw_context->cmd_bounce);
2297
2298         sw_context->cmd_bounce = vmalloc(sw_context->cmd_bounce_size);
2299
2300         if (sw_context->cmd_bounce == NULL) {
2301                 DRM_ERROR("Failed to allocate command bounce buffer.\n");
2302                 sw_context->cmd_bounce_size = 0;
2303                 return -ENOMEM;
2304         }
2305
2306         return 0;
2307 }
2308
2309 /**
2310  * vmw_execbuf_fence_commands - create and submit a command stream fence
2311  *
2312  * Creates a fence object and submits a command stream marker.
2313  * If this fails for some reason, We sync the fifo and return NULL.
2314  * It is then safe to fence buffers with a NULL pointer.
2315  *
2316  * If @p_handle is not NULL @file_priv must also not be NULL. Creates
2317  * a userspace handle if @p_handle is not NULL, otherwise not.
2318  */
2319
2320 int vmw_execbuf_fence_commands(struct drm_file *file_priv,
2321                                struct vmw_private *dev_priv,
2322                                struct vmw_fence_obj **p_fence,
2323                                uint32_t *p_handle)
2324 {
2325         uint32_t sequence;
2326         int ret;
2327         bool synced = false;
2328
2329         /* p_handle implies file_priv. */
2330         BUG_ON(p_handle != NULL && file_priv == NULL);
2331
2332         ret = vmw_fifo_send_fence(dev_priv, &sequence);
2333         if (unlikely(ret != 0)) {
2334                 DRM_ERROR("Fence submission error. Syncing.\n");
2335                 synced = true;
2336         }
2337
2338         if (p_handle != NULL)
2339                 ret = vmw_user_fence_create(file_priv, dev_priv->fman,
2340                                             sequence, p_fence, p_handle);
2341         else
2342                 ret = vmw_fence_create(dev_priv->fman, sequence, p_fence);
2343
2344         if (unlikely(ret != 0 && !synced)) {
2345                 (void) vmw_fallback_wait(dev_priv, false, false,
2346                                          sequence, false,
2347                                          VMW_FENCE_WAIT_TIMEOUT);
2348                 *p_fence = NULL;
2349         }
2350
2351         return 0;
2352 }
2353
2354 /**
2355  * vmw_execbuf_copy_fence_user - copy fence object information to
2356  * user-space.
2357  *
2358  * @dev_priv: Pointer to a vmw_private struct.
2359  * @vmw_fp: Pointer to the struct vmw_fpriv representing the calling file.
2360  * @ret: Return value from fence object creation.
2361  * @user_fence_rep: User space address of a struct drm_vmw_fence_rep to
2362  * which the information should be copied.
2363  * @fence: Pointer to the fenc object.
2364  * @fence_handle: User-space fence handle.
2365  *
2366  * This function copies fence information to user-space. If copying fails,
2367  * The user-space struct drm_vmw_fence_rep::error member is hopefully
2368  * left untouched, and if it's preloaded with an -EFAULT by user-space,
2369  * the error will hopefully be detected.
2370  * Also if copying fails, user-space will be unable to signal the fence
2371  * object so we wait for it immediately, and then unreference the
2372  * user-space reference.
2373  */
2374 void
2375 vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
2376                             struct vmw_fpriv *vmw_fp,
2377                             int ret,
2378                             struct drm_vmw_fence_rep __user *user_fence_rep,
2379                             struct vmw_fence_obj *fence,
2380                             uint32_t fence_handle)
2381 {
2382         struct drm_vmw_fence_rep fence_rep;
2383
2384         if (user_fence_rep == NULL)
2385                 return;
2386
2387         memset(&fence_rep, 0, sizeof(fence_rep));
2388
2389         fence_rep.error = ret;
2390         if (ret == 0) {
2391                 BUG_ON(fence == NULL);
2392
2393                 fence_rep.handle = fence_handle;
2394                 fence_rep.seqno = fence->base.seqno;
2395                 vmw_update_seqno(dev_priv, &dev_priv->fifo);
2396                 fence_rep.passed_seqno = dev_priv->last_read_seqno;
2397         }
2398
2399         /*
2400          * copy_to_user errors will be detected by user space not
2401          * seeing fence_rep::error filled in. Typically
2402          * user-space would have pre-set that member to -EFAULT.
2403          */
2404         ret = copy_to_user(user_fence_rep, &fence_rep,
2405                            sizeof(fence_rep));
2406
2407         /*
2408          * User-space lost the fence object. We need to sync
2409          * and unreference the handle.
2410          */
2411         if (unlikely(ret != 0) && (fence_rep.error == 0)) {
2412                 ttm_ref_object_base_unref(vmw_fp->tfile,
2413                                           fence_handle, TTM_REF_USAGE);
2414                 DRM_ERROR("Fence copy error. Syncing.\n");
2415                 (void) vmw_fence_obj_wait(fence, false, false,
2416                                           VMW_FENCE_WAIT_TIMEOUT);
2417         }
2418 }
2419
2420
2421
2422 int vmw_execbuf_process(struct drm_file *file_priv,
2423                         struct vmw_private *dev_priv,
2424                         void __user *user_commands,
2425                         void *kernel_commands,
2426                         uint32_t command_size,
2427                         uint64_t throttle_us,
2428                         struct drm_vmw_fence_rep __user *user_fence_rep,
2429                         struct vmw_fence_obj **out_fence)
2430 {
2431         struct vmw_sw_context *sw_context = &dev_priv->ctx;
2432         struct vmw_fence_obj *fence = NULL;
2433         struct vmw_resource *error_resource;
2434         struct list_head resource_list;
2435         struct ww_acquire_ctx ticket;
2436         uint32_t handle;
2437         void *cmd;
2438         int ret;
2439
2440         ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
2441         if (unlikely(ret != 0))
2442                 return -ERESTARTSYS;
2443
2444         if (kernel_commands == NULL) {
2445                 sw_context->kernel = false;
2446
2447                 ret = vmw_resize_cmd_bounce(sw_context, command_size);
2448                 if (unlikely(ret != 0))
2449                         goto out_unlock;
2450
2451
2452                 ret = copy_from_user(sw_context->cmd_bounce,
2453                                      user_commands, command_size);
2454
2455                 if (unlikely(ret != 0)) {
2456                         ret = -EFAULT;
2457                         DRM_ERROR("Failed copying commands.\n");
2458                         goto out_unlock;
2459                 }
2460                 kernel_commands = sw_context->cmd_bounce;
2461         } else
2462                 sw_context->kernel = true;
2463
2464         sw_context->fp = vmw_fpriv(file_priv);
2465         sw_context->cur_reloc = 0;
2466         sw_context->cur_val_buf = 0;
2467         INIT_LIST_HEAD(&sw_context->resource_list);
2468         sw_context->cur_query_bo = dev_priv->pinned_bo;
2469         sw_context->last_query_ctx = NULL;
2470         sw_context->needs_post_query_barrier = false;
2471         memset(sw_context->res_cache, 0, sizeof(sw_context->res_cache));
2472         INIT_LIST_HEAD(&sw_context->validate_nodes);
2473         INIT_LIST_HEAD(&sw_context->res_relocations);
2474         if (!sw_context->res_ht_initialized) {
2475                 ret = drm_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER);
2476                 if (unlikely(ret != 0))
2477                         goto out_unlock;
2478                 sw_context->res_ht_initialized = true;
2479         }
2480         INIT_LIST_HEAD(&sw_context->staged_cmd_res);
2481
2482         INIT_LIST_HEAD(&resource_list);
2483         ret = vmw_cmd_check_all(dev_priv, sw_context, kernel_commands,
2484                                 command_size);
2485         if (unlikely(ret != 0))
2486                 goto out_err_nores;
2487
2488         ret = vmw_resources_reserve(sw_context);
2489         if (unlikely(ret != 0))
2490                 goto out_err_nores;
2491
2492         ret = ttm_eu_reserve_buffers(&ticket, &sw_context->validate_nodes,
2493                                      true, NULL);
2494         if (unlikely(ret != 0))
2495                 goto out_err_nores;
2496
2497         ret = vmw_validate_buffers(dev_priv, sw_context);
2498         if (unlikely(ret != 0))
2499                 goto out_err;
2500
2501         ret = vmw_resources_validate(sw_context);
2502         if (unlikely(ret != 0))
2503                 goto out_err;
2504
2505         if (throttle_us) {
2506                 ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.marker_queue,
2507                                    throttle_us);
2508
2509                 if (unlikely(ret != 0))
2510                         goto out_err;
2511         }
2512
2513         ret = mutex_lock_interruptible(&dev_priv->binding_mutex);
2514         if (unlikely(ret != 0)) {
2515                 ret = -ERESTARTSYS;
2516                 goto out_err;
2517         }
2518
2519         if (dev_priv->has_mob) {
2520                 ret = vmw_rebind_contexts(sw_context);
2521                 if (unlikely(ret != 0))
2522                         goto out_unlock_binding;
2523         }
2524
2525         cmd = vmw_fifo_reserve(dev_priv, command_size);
2526         if (unlikely(cmd == NULL)) {
2527                 DRM_ERROR("Failed reserving fifo space for commands.\n");
2528                 ret = -ENOMEM;
2529                 goto out_unlock_binding;
2530         }
2531
2532         vmw_apply_relocations(sw_context);
2533         memcpy(cmd, kernel_commands, command_size);
2534
2535         vmw_resource_relocations_apply(cmd, &sw_context->res_relocations);
2536         vmw_resource_relocations_free(&sw_context->res_relocations);
2537
2538         vmw_fifo_commit(dev_priv, command_size);
2539         mutex_unlock(&dev_priv->binding_mutex);
2540
2541         vmw_query_bo_switch_commit(dev_priv, sw_context);
2542         ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
2543                                          &fence,
2544                                          (user_fence_rep) ? &handle : NULL);
2545         /*
2546          * This error is harmless, because if fence submission fails,
2547          * vmw_fifo_send_fence will sync. The error will be propagated to
2548          * user-space in @fence_rep
2549          */
2550
2551         if (ret != 0)
2552                 DRM_ERROR("Fence submission error. Syncing.\n");
2553
2554         vmw_resource_list_unreserve(&sw_context->resource_list, false);
2555
2556         ttm_eu_fence_buffer_objects(&ticket, &sw_context->validate_nodes,
2557                                     (void *) fence);
2558
2559         if (unlikely(dev_priv->pinned_bo != NULL &&
2560                      !dev_priv->query_cid_valid))
2561                 __vmw_execbuf_release_pinned_bo(dev_priv, fence);
2562
2563         vmw_clear_validations(sw_context);
2564         vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret,
2565                                     user_fence_rep, fence, handle);
2566
2567         /* Don't unreference when handing fence out */
2568         if (unlikely(out_fence != NULL)) {
2569                 *out_fence = fence;
2570                 fence = NULL;
2571         } else if (likely(fence != NULL)) {
2572                 vmw_fence_obj_unreference(&fence);
2573         }
2574
2575         list_splice_init(&sw_context->resource_list, &resource_list);
2576         vmw_cmdbuf_res_commit(&sw_context->staged_cmd_res);
2577         mutex_unlock(&dev_priv->cmdbuf_mutex);
2578
2579         /*
2580          * Unreference resources outside of the cmdbuf_mutex to
2581          * avoid deadlocks in resource destruction paths.
2582          */
2583         vmw_resource_list_unreference(&resource_list);
2584
2585         return 0;
2586
2587 out_unlock_binding:
2588         mutex_unlock(&dev_priv->binding_mutex);
2589 out_err:
2590         ttm_eu_backoff_reservation(&ticket, &sw_context->validate_nodes);
2591 out_err_nores:
2592         vmw_resource_list_unreserve(&sw_context->resource_list, true);
2593         vmw_resource_relocations_free(&sw_context->res_relocations);
2594         vmw_free_relocations(sw_context);
2595         vmw_clear_validations(sw_context);
2596         if (unlikely(dev_priv->pinned_bo != NULL &&
2597                      !dev_priv->query_cid_valid))
2598                 __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
2599 out_unlock:
2600         list_splice_init(&sw_context->resource_list, &resource_list);
2601         error_resource = sw_context->error_resource;
2602         sw_context->error_resource = NULL;
2603         vmw_cmdbuf_res_revert(&sw_context->staged_cmd_res);
2604         mutex_unlock(&dev_priv->cmdbuf_mutex);
2605
2606         /*
2607          * Unreference resources outside of the cmdbuf_mutex to
2608          * avoid deadlocks in resource destruction paths.
2609          */
2610         vmw_resource_list_unreference(&resource_list);
2611         if (unlikely(error_resource != NULL))
2612                 vmw_resource_unreference(&error_resource);
2613
2614         return ret;
2615 }
2616
2617 /**
2618  * vmw_execbuf_unpin_panic - Idle the fifo and unpin the query buffer.
2619  *
2620  * @dev_priv: The device private structure.
2621  *
2622  * This function is called to idle the fifo and unpin the query buffer
2623  * if the normal way to do this hits an error, which should typically be
2624  * extremely rare.
2625  */
2626 static void vmw_execbuf_unpin_panic(struct vmw_private *dev_priv)
2627 {
2628         DRM_ERROR("Can't unpin query buffer. Trying to recover.\n");
2629
2630         (void) vmw_fallback_wait(dev_priv, false, true, 0, false, 10*HZ);
2631         vmw_bo_pin(dev_priv->pinned_bo, false);
2632         vmw_bo_pin(dev_priv->dummy_query_bo, false);
2633         dev_priv->dummy_query_bo_pinned = false;
2634 }
2635
2636
2637 /**
2638  * __vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
2639  * query bo.
2640  *
2641  * @dev_priv: The device private structure.
2642  * @fence: If non-NULL should point to a struct vmw_fence_obj issued
2643  * _after_ a query barrier that flushes all queries touching the current
2644  * buffer pointed to by @dev_priv->pinned_bo
2645  *
2646  * This function should be used to unpin the pinned query bo, or
2647  * as a query barrier when we need to make sure that all queries have
2648  * finished before the next fifo command. (For example on hardware
2649  * context destructions where the hardware may otherwise leak unfinished
2650  * queries).
2651  *
2652  * This function does not return any failure codes, but make attempts
2653  * to do safe unpinning in case of errors.
2654  *
2655  * The function will synchronize on the previous query barrier, and will
2656  * thus not finish until that barrier has executed.
2657  *
2658  * the @dev_priv->cmdbuf_mutex needs to be held by the current thread
2659  * before calling this function.
2660  */
2661 void __vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv,
2662                                      struct vmw_fence_obj *fence)
2663 {
2664         int ret = 0;
2665         struct list_head validate_list;
2666         struct ttm_validate_buffer pinned_val, query_val;
2667         struct vmw_fence_obj *lfence = NULL;
2668         struct ww_acquire_ctx ticket;
2669
2670         if (dev_priv->pinned_bo == NULL)
2671                 goto out_unlock;
2672
2673         INIT_LIST_HEAD(&validate_list);
2674
2675         pinned_val.bo = ttm_bo_reference(dev_priv->pinned_bo);
2676         pinned_val.shared = false;
2677         list_add_tail(&pinned_val.head, &validate_list);
2678
2679         query_val.bo = ttm_bo_reference(dev_priv->dummy_query_bo);
2680         query_val.shared = false;
2681         list_add_tail(&query_val.head, &validate_list);
2682
2683         ret = ttm_eu_reserve_buffers(&ticket, &validate_list,
2684                                      false, NULL);
2685         if (unlikely(ret != 0)) {
2686                 vmw_execbuf_unpin_panic(dev_priv);
2687                 goto out_no_reserve;
2688         }
2689
2690         if (dev_priv->query_cid_valid) {
2691                 BUG_ON(fence != NULL);
2692                 ret = vmw_fifo_emit_dummy_query(dev_priv, dev_priv->query_cid);
2693                 if (unlikely(ret != 0)) {
2694                         vmw_execbuf_unpin_panic(dev_priv);
2695                         goto out_no_emit;
2696                 }
2697                 dev_priv->query_cid_valid = false;
2698         }
2699
2700         vmw_bo_pin(dev_priv->pinned_bo, false);
2701         vmw_bo_pin(dev_priv->dummy_query_bo, false);
2702         dev_priv->dummy_query_bo_pinned = false;
2703
2704         if (fence == NULL) {
2705                 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &lfence,
2706                                                   NULL);
2707                 fence = lfence;
2708         }
2709         ttm_eu_fence_buffer_objects(&ticket, &validate_list, (void *) fence);
2710         if (lfence != NULL)
2711                 vmw_fence_obj_unreference(&lfence);
2712
2713         ttm_bo_unref(&query_val.bo);
2714         ttm_bo_unref(&pinned_val.bo);
2715         ttm_bo_unref(&dev_priv->pinned_bo);
2716
2717 out_unlock:
2718         return;
2719
2720 out_no_emit:
2721         ttm_eu_backoff_reservation(&ticket, &validate_list);
2722 out_no_reserve:
2723         ttm_bo_unref(&query_val.bo);
2724         ttm_bo_unref(&pinned_val.bo);
2725         ttm_bo_unref(&dev_priv->pinned_bo);
2726 }
2727
2728 /**
2729  * vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
2730  * query bo.
2731  *
2732  * @dev_priv: The device private structure.
2733  *
2734  * This function should be used to unpin the pinned query bo, or
2735  * as a query barrier when we need to make sure that all queries have
2736  * finished before the next fifo command. (For example on hardware
2737  * context destructions where the hardware may otherwise leak unfinished
2738  * queries).
2739  *
2740  * This function does not return any failure codes, but make attempts
2741  * to do safe unpinning in case of errors.
2742  *
2743  * The function will synchronize on the previous query barrier, and will
2744  * thus not finish until that barrier has executed.
2745  */
2746 void vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv)
2747 {
2748         mutex_lock(&dev_priv->cmdbuf_mutex);
2749         if (dev_priv->query_cid_valid)
2750                 __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
2751         mutex_unlock(&dev_priv->cmdbuf_mutex);
2752 }
2753
2754
2755 int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
2756                       struct drm_file *file_priv)
2757 {
2758         struct vmw_private *dev_priv = vmw_priv(dev);
2759         struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data;
2760         int ret;
2761
2762         /*
2763          * This will allow us to extend the ioctl argument while
2764          * maintaining backwards compatibility:
2765          * We take different code paths depending on the value of
2766          * arg->version.
2767          */
2768
2769         if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) {
2770                 DRM_ERROR("Incorrect execbuf version.\n");
2771                 DRM_ERROR("You're running outdated experimental "
2772                           "vmwgfx user-space drivers.");
2773                 return -EINVAL;
2774         }
2775
2776         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
2777         if (unlikely(ret != 0))
2778                 return ret;
2779
2780         ret = vmw_execbuf_process(file_priv, dev_priv,
2781                                   (void __user *)(unsigned long)arg->commands,
2782                                   NULL, arg->command_size, arg->throttle_us,
2783                                   (void __user *)(unsigned long)arg->fence_rep,
2784                                   NULL);
2785         ttm_read_unlock(&dev_priv->reservation_sem);
2786         if (unlikely(ret != 0))
2787                 return ret;
2788
2789         vmw_kms_cursor_post_execbuf(dev_priv);
2790
2791         return 0;
2792 }