drivers/gpu/drm/vmwgfx/vmwgfx_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2012 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include "vmwgfx_resource_priv.h"
  30 #include "ttm/ttm_placement.h"
  31
  32 struct vmw_user_context {
  33         struct ttm_base_object base;
  34         struct vmw_resource res;
  35         struct vmw_ctx_binding_state cbs;
  36 };
  37
  38
  39
  40 typedef int (*vmw_scrub_func)(struct vmw_ctx_bindinfo *, bool);
  41
  42 static void vmw_user_context_free(struct vmw_resource *res);
  43 static struct vmw_resource *
  44 vmw_user_context_base_to_res(struct ttm_base_object *base);
  45
  46 static int vmw_gb_context_create(struct vmw_resource *res);
  47 static int vmw_gb_context_bind(struct vmw_resource *res,
  48                                struct ttm_validate_buffer *val_buf);
  49 static int vmw_gb_context_unbind(struct vmw_resource *res,
  50                                  bool readback,
  51                                  struct ttm_validate_buffer *val_buf);
  52 static int vmw_gb_context_destroy(struct vmw_resource *res);
  53 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind);
  54 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi,
  55                                            bool rebind);
  56 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi, bool rebind);
  57 static void vmw_context_binding_state_scrub(struct vmw_ctx_binding_state *cbs);
  58 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs);
  59 static uint64_t vmw_user_context_size;
  60
  61 static const struct vmw_user_resource_conv user_context_conv = {
  62         .object_type = VMW_RES_CONTEXT,
  63         .base_obj_to_res = vmw_user_context_base_to_res,
  64         .res_free = vmw_user_context_free
  65 };
  66
  67 const struct vmw_user_resource_conv *user_context_converter =
  68         &user_context_conv;
  69
  70
  71 static const struct vmw_res_func vmw_legacy_context_func = {
  72         .res_type = vmw_res_context,
  73         .needs_backup = false,
  74         .may_evict = false,
  75         .type_name = "legacy contexts",
  76         .backup_placement = NULL,
  77         .create = NULL,
  78         .destroy = NULL,
  79         .bind = NULL,
  80         .unbind = NULL
  81 };
  82
  83 static const struct vmw_res_func vmw_gb_context_func = {
  84         .res_type = vmw_res_context,
  85         .needs_backup = true,
  86         .may_evict = true,
  87         .type_name = "guest backed contexts",
  88         .backup_placement = &vmw_mob_placement,
  89         .create = vmw_gb_context_create,
  90         .destroy = vmw_gb_context_destroy,
  91         .bind = vmw_gb_context_bind,
  92         .unbind = vmw_gb_context_unbind
  93 };
  94
  95 static const vmw_scrub_func vmw_scrub_funcs[vmw_ctx_binding_max] = {
  96         [vmw_ctx_binding_shader] = vmw_context_scrub_shader,
  97         [vmw_ctx_binding_rt] = vmw_context_scrub_render_target,
  98         [vmw_ctx_binding_tex] = vmw_context_scrub_texture };
  99
 100 /**
 101  * Context management:
 102  */
 103
 104 static void vmw_hw_context_destroy(struct vmw_resource *res)
 105 {
 106
 107         struct vmw_private *dev_priv = res->dev_priv;
 108         struct {
 109                 SVGA3dCmdHeader header;
 110                 SVGA3dCmdDestroyContext body;
 111         } *cmd;
 112
 113
 114         if (res->func->destroy == vmw_gb_context_destroy) {
 115                 mutex_lock(&dev_priv->cmdbuf_mutex);
 116                 mutex_lock(&dev_priv->binding_mutex);
 117                 (void) vmw_context_binding_state_kill
 118                         (&container_of(res, struct vmw_user_context, res)->cbs);
 119                 (void) vmw_gb_context_destroy(res);
 120                 if (dev_priv->pinned_bo != NULL &&
 121                     !dev_priv->query_cid_valid)
 122                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 123                 mutex_unlock(&dev_priv->binding_mutex);
 124                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 125                 return;
 126         }
 127
 128         vmw_execbuf_release_pinned_bo(dev_priv);
 129         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 130         if (unlikely(cmd == NULL)) {
 131                 DRM_ERROR("Failed reserving FIFO space for surface "
 132                           "destruction.\n");
 133                 return;
 134         }
 135
 136         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
 137         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 138         cmd->body.cid = cpu_to_le32(res->id);
 139
 140         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 141         vmw_3d_resource_dec(dev_priv, false);
 142 }
 143
 144 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 145                                struct vmw_resource *res,
 146                                void (*res_free) (struct vmw_resource *res))
 147 {
 148         int ret;
 149         struct vmw_user_context *uctx =
 150                 container_of(res, struct vmw_user_context, res);
 151
 152         ret = vmw_resource_init(dev_priv, res, true,
 153                                 res_free, &vmw_gb_context_func);
 154         res->backup_size = SVGA3D_CONTEXT_DATA_SIZE;
 155
 156         if (unlikely(ret != 0)) {
 157                 if (res_free)
 158                         res_free(res);
 159                 else
 160                         kfree(res);
 161                 return ret;
 162         }
 163
 164         memset(&uctx->cbs, 0, sizeof(uctx->cbs));
 165         INIT_LIST_HEAD(&uctx->cbs.list);
 166
 167         vmw_resource_activate(res, vmw_hw_context_destroy);
 168         return 0;
 169 }
 170
 171 static int vmw_context_init(struct vmw_private *dev_priv,
 172                             struct vmw_resource *res,
 173                             void (*res_free) (struct vmw_resource *res))
 174 {
 175         int ret;
 176
 177         struct {
 178                 SVGA3dCmdHeader header;
 179                 SVGA3dCmdDefineContext body;
 180         } *cmd;
 181
 182         if (dev_priv->has_mob)
 183                 return vmw_gb_context_init(dev_priv, res, res_free);
 184
 185         ret = vmw_resource_init(dev_priv, res, false,
 186                                 res_free, &vmw_legacy_context_func);
 187
 188         if (unlikely(ret != 0)) {
 189                 DRM_ERROR("Failed to allocate a resource id.\n");
 190                 goto out_early;
 191         }
 192
 193         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 194                 DRM_ERROR("Out of hw context ids.\n");
 195                 vmw_resource_unreference(&res);
 196                 return -ENOMEM;
 197         }
 198
 199         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 200         if (unlikely(cmd == NULL)) {
 201                 DRM_ERROR("Fifo reserve failed.\n");
 202                 vmw_resource_unreference(&res);
 203                 return -ENOMEM;
 204         }
 205
 206         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 207         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 208         cmd->body.cid = cpu_to_le32(res->id);
 209
 210         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 211         (void) vmw_3d_resource_inc(dev_priv, false);
 212         vmw_resource_activate(res, vmw_hw_context_destroy);
 213         return 0;
 214
 215 out_early:
 216         if (res_free == NULL)
 217                 kfree(res);
 218         else
 219                 res_free(res);
 220         return ret;
 221 }
 222
 223 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 224 {
 225         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 226         int ret;
 227
 228         if (unlikely(res == NULL))
 229                 return NULL;
 230
 231         ret = vmw_context_init(dev_priv, res, NULL);
 232
 233         return (ret == 0) ? res : NULL;
 234 }
 235
 236
 237 static int vmw_gb_context_create(struct vmw_resource *res)
 238 {
 239         struct vmw_private *dev_priv = res->dev_priv;
 240         int ret;
 241         struct {
 242                 SVGA3dCmdHeader header;
 243                 SVGA3dCmdDefineGBContext body;
 244         } *cmd;
 245
 246         if (likely(res->id != -1))
 247                 return 0;
 248
 249         ret = vmw_resource_alloc_id(res);
 250         if (unlikely(ret != 0)) {
 251                 DRM_ERROR("Failed to allocate a context id.\n");
 252                 goto out_no_id;
 253         }
 254
 255         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 256                 ret = -EBUSY;
 257                 goto out_no_fifo;
 258         }
 259
 260         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 261         if (unlikely(cmd == NULL)) {
 262                 DRM_ERROR("Failed reserving FIFO space for context "
 263                           "creation.\n");
 264                 ret = -ENOMEM;
 265                 goto out_no_fifo;
 266         }
 267
 268         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 269         cmd->header.size = sizeof(cmd->body);
 270         cmd->body.cid = res->id;
 271         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 272         (void) vmw_3d_resource_inc(dev_priv, false);
 273
 274         return 0;
 275
 276 out_no_fifo:
 277         vmw_resource_release_id(res);
 278 out_no_id:
 279         return ret;
 280 }
 281
 282 static int vmw_gb_context_bind(struct vmw_resource *res,
 283                                struct ttm_validate_buffer *val_buf)
 284 {
 285         struct vmw_private *dev_priv = res->dev_priv;
 286         struct {
 287                 SVGA3dCmdHeader header;
 288                 SVGA3dCmdBindGBContext body;
 289         } *cmd;
 290         struct ttm_buffer_object *bo = val_buf->bo;
 291
 292         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 293
 294         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 295         if (unlikely(cmd == NULL)) {
 296                 DRM_ERROR("Failed reserving FIFO space for context "
 297                           "binding.\n");
 298                 return -ENOMEM;
 299         }
 300
 301         cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 302         cmd->header.size = sizeof(cmd->body);
 303         cmd->body.cid = res->id;
 304         cmd->body.mobid = bo->mem.start;
 305         cmd->body.validContents = res->backup_dirty;
 306         res->backup_dirty = false;
 307         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 308
 309         return 0;
 310 }
 311
 312 static int vmw_gb_context_unbind(struct vmw_resource *res,
 313                                  bool readback,
 314                                  struct ttm_validate_buffer *val_buf)
 315 {
 316         struct vmw_private *dev_priv = res->dev_priv;
 317         struct ttm_buffer_object *bo = val_buf->bo;
 318         struct vmw_fence_obj *fence;
 319         struct vmw_user_context *uctx =
 320                 container_of(res, struct vmw_user_context, res);
 321
 322         struct {
 323                 SVGA3dCmdHeader header;
 324                 SVGA3dCmdReadbackGBContext body;
 325         } *cmd1;
 326         struct {
 327                 SVGA3dCmdHeader header;
 328                 SVGA3dCmdBindGBContext body;
 329         } *cmd2;
 330         uint32_t submit_size;
 331         uint8_t *cmd;
 332
 333
 334         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 335
 336         mutex_lock(&dev_priv->binding_mutex);
 337         vmw_context_binding_state_scrub(&uctx->cbs);
 338
 339         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 340
 341         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 342         if (unlikely(cmd == NULL)) {
 343                 DRM_ERROR("Failed reserving FIFO space for context "
 344                           "unbinding.\n");
 345                 mutex_unlock(&dev_priv->binding_mutex);
 346                 return -ENOMEM;
 347         }
 348
 349         cmd2 = (void *) cmd;
 350         if (readback) {
 351                 cmd1 = (void *) cmd;
 352                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 353                 cmd1->header.size = sizeof(cmd1->body);
 354                 cmd1->body.cid = res->id;
 355                 cmd2 = (void *) (&cmd1[1]);
 356         }
 357         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 358         cmd2->header.size = sizeof(cmd2->body);
 359         cmd2->body.cid = res->id;
 360         cmd2->body.mobid = SVGA3D_INVALID_ID;
 361
 362         vmw_fifo_commit(dev_priv, submit_size);
 363         mutex_unlock(&dev_priv->binding_mutex);
 364
 365         /*
 366          * Create a fence object and fence the backup buffer.
 367          */
 368
 369         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 370                                           &fence, NULL);
 371
 372         vmw_fence_single_bo(bo, fence);
 373
 374         if (likely(fence != NULL))
 375                 vmw_fence_obj_unreference(&fence);
 376
 377         return 0;
 378 }
 379
 380 static int vmw_gb_context_destroy(struct vmw_resource *res)
 381 {
 382         struct vmw_private *dev_priv = res->dev_priv;
 383         struct {
 384                 SVGA3dCmdHeader header;
 385                 SVGA3dCmdDestroyGBContext body;
 386         } *cmd;
 387
 388         if (likely(res->id == -1))
 389                 return 0;
 390
 391         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 392         if (unlikely(cmd == NULL)) {
 393                 DRM_ERROR("Failed reserving FIFO space for context "
 394                           "destruction.\n");
 395                 return -ENOMEM;
 396         }
 397
 398         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 399         cmd->header.size = sizeof(cmd->body);
 400         cmd->body.cid = res->id;
 401         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 402         if (dev_priv->query_cid == res->id)
 403                 dev_priv->query_cid_valid = false;
 404         vmw_resource_release_id(res);
 405         vmw_3d_resource_dec(dev_priv, false);
 406
 407         return 0;
 408 }
 409
 410 /**
 411  * User-space context management:
 412  */
 413
 414 static struct vmw_resource *
 415 vmw_user_context_base_to_res(struct ttm_base_object *base)
 416 {
 417         return &(container_of(base, struct vmw_user_context, base)->res);
 418 }
 419
 420 static void vmw_user_context_free(struct vmw_resource *res)
 421 {
 422         struct vmw_user_context *ctx =
 423             container_of(res, struct vmw_user_context, res);
 424         struct vmw_private *dev_priv = res->dev_priv;
 425
 426         ttm_base_object_kfree(ctx, base);
 427         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 428                             vmw_user_context_size);
 429 }
 430
 431 /**
 432  * This function is called when user space has no more references on the
 433  * base object. It releases the base-object's reference on the resource object.
 434  */
 435
 436 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 437 {
 438         struct ttm_base_object *base = *p_base;
 439         struct vmw_user_context *ctx =
 440             container_of(base, struct vmw_user_context, base);
 441         struct vmw_resource *res = &ctx->res;
 442
 443         *p_base = NULL;
 444         vmw_resource_unreference(&res);
 445 }
 446
 447 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 448                               struct drm_file *file_priv)
 449 {
 450         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 451         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 452
 453         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 454 }
 455
 456 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 457                              struct drm_file *file_priv)
 458 {
 459         struct vmw_private *dev_priv = vmw_priv(dev);
 460         struct vmw_user_context *ctx;
 461         struct vmw_resource *res;
 462         struct vmw_resource *tmp;
 463         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 464         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 465         struct vmw_master *vmaster = vmw_master(file_priv->master);
 466         int ret;
 467
 468
 469         /*
 470          * Approximate idr memory usage with 128 bytes. It will be limited
 471          * by maximum number_of contexts anyway.
 472          */
 473
 474         if (unlikely(vmw_user_context_size == 0))
 475                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128;
 476
 477         ret = ttm_read_lock(&vmaster->lock, true);
 478         if (unlikely(ret != 0))
 479                 return ret;
 480
 481         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 482                                    vmw_user_context_size,
 483                                    false, true);
 484         if (unlikely(ret != 0)) {
 485                 if (ret != -ERESTARTSYS)
 486                         DRM_ERROR("Out of graphics memory for context"
 487                                   " creation.\n");
 488                 goto out_unlock;
 489         }
 490
 491         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 492         if (unlikely(ctx == NULL)) {
 493                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 494                                     vmw_user_context_size);
 495                 ret = -ENOMEM;
 496                 goto out_unlock;
 497         }
 498
 499         res = &ctx->res;
 500         ctx->base.shareable = false;
 501         ctx->base.tfile = NULL;
 502
 503         /*
 504          * From here on, the destructor takes over resource freeing.
 505          */
 506
 507         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 508         if (unlikely(ret != 0))
 509                 goto out_unlock;
 510
 511         tmp = vmw_resource_reference(&ctx->res);
 512         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 513                                    &vmw_user_context_base_release, NULL);
 514
 515         if (unlikely(ret != 0)) {
 516                 vmw_resource_unreference(&tmp);
 517                 goto out_err;
 518         }
 519
 520         arg->cid = ctx->base.hash.key;
 521 out_err:
 522         vmw_resource_unreference(&res);
 523 out_unlock:
 524         ttm_read_unlock(&vmaster->lock);
 525         return ret;
 526
 527 }
 528
 529 /**
 530  * vmw_context_scrub_shader - scrub a shader binding from a context.
 531  *
 532  * @bi: single binding information.
 533  * @rebind: Whether to issue a bind instead of scrub command.
 534  */
 535 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind)
 536 {
 537         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 538         struct {
 539                 SVGA3dCmdHeader header;
 540                 SVGA3dCmdSetShader body;
 541         } *cmd;
 542
 543         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 544         if (unlikely(cmd == NULL)) {
 545                 DRM_ERROR("Failed reserving FIFO space for shader "
 546                           "unbinding.\n");
 547                 return -ENOMEM;
 548         }
 549
 550         cmd->header.id = SVGA_3D_CMD_SET_SHADER;
 551         cmd->header.size = sizeof(cmd->body);
 552         cmd->body.cid = bi->ctx->id;
 553         cmd->body.type = bi->i1.shader_type;
 554         cmd->body.shid =
 555                 cpu_to_le32((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 556         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 557
 558         return 0;
 559 }
 560
 561 /**
 562  * vmw_context_scrub_render_target - scrub a render target binding
 563  * from a context.
 564  *
 565  * @bi: single binding information.
 566  * @rebind: Whether to issue a bind instead of scrub command.
 567  */
 568 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi,
 569                                            bool rebind)
 570 {
 571         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 572         struct {
 573                 SVGA3dCmdHeader header;
 574                 SVGA3dCmdSetRenderTarget body;
 575         } *cmd;
 576
 577         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 578         if (unlikely(cmd == NULL)) {
 579                 DRM_ERROR("Failed reserving FIFO space for render target "
 580                           "unbinding.\n");
 581                 return -ENOMEM;
 582         }
 583
 584         cmd->header.id = SVGA_3D_CMD_SETRENDERTARGET;
 585         cmd->header.size = sizeof(cmd->body);
 586         cmd->body.cid = bi->ctx->id;
 587         cmd->body.type = bi->i1.rt_type;
 588         cmd->body.target.sid =
 589                 cpu_to_le32((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 590         cmd->body.target.face = 0;
 591         cmd->body.target.mipmap = 0;
 592         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 593
 594         return 0;
 595 }
 596
 597 /**
 598  * vmw_context_scrub_texture - scrub a texture binding from a context.
 599  *
 600  * @bi: single binding information.
 601  * @rebind: Whether to issue a bind instead of scrub command.
 602  *
 603  * TODO: Possibly complement this function with a function that takes
 604  * a list of texture bindings and combines them to a single command.
 605  */
 606 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi,
 607                                      bool rebind)
 608 {
 609         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 610         struct {
 611                 SVGA3dCmdHeader header;
 612                 struct {
 613                         SVGA3dCmdSetTextureState c;
 614                         SVGA3dTextureState s1;
 615                 } body;
 616         } *cmd;
 617
 618         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 619         if (unlikely(cmd == NULL)) {
 620                 DRM_ERROR("Failed reserving FIFO space for texture "
 621                           "unbinding.\n");
 622                 return -ENOMEM;
 623         }
 624
 625
 626         cmd->header.id = SVGA_3D_CMD_SETTEXTURESTATE;
 627         cmd->header.size = sizeof(cmd->body);
 628         cmd->body.c.cid = bi->ctx->id;
 629         cmd->body.s1.stage = bi->i1.texture_stage;
 630         cmd->body.s1.name = SVGA3D_TS_BIND_TEXTURE;
 631         cmd->body.s1.value =
 632                 cpu_to_le32((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 633         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 634
 635         return 0;
 636 }
 637
 638 /**
 639  * vmw_context_binding_drop: Stop tracking a context binding
 640  *
 641  * @cb: Pointer to binding tracker storage.
 642  *
 643  * Stops tracking a context binding, and re-initializes its storage.
 644  * Typically used when the context binding is replaced with a binding to
 645  * another (or the same, for that matter) resource.
 646  */
 647 static void vmw_context_binding_drop(struct vmw_ctx_binding *cb)
 648 {
 649         list_del(&cb->ctx_list);
 650         if (!list_empty(&cb->res_list))
 651                 list_del(&cb->res_list);
 652         cb->bi.ctx = NULL;
 653 }
 654
 655 /**
 656  * vmw_context_binding_add: Start tracking a context binding
 657  *
 658  * @cbs: Pointer to the context binding state tracker.
 659  * @bi: Information about the binding to track.
 660  *
 661  * Performs basic checks on the binding to make sure arguments are within
 662  * bounds and then starts tracking the binding in the context binding
 663  * state structure @cbs.
 664  */
 665 int vmw_context_binding_add(struct vmw_ctx_binding_state *cbs,
 666                             const struct vmw_ctx_bindinfo *bi)
 667 {
 668         struct vmw_ctx_binding *loc;
 669
 670         switch (bi->bt) {
 671         case vmw_ctx_binding_rt:
 672                 if (unlikely((unsigned)bi->i1.rt_type >= SVGA3D_RT_MAX)) {
 673                         DRM_ERROR("Illegal render target type %u.\n",
 674                                   (unsigned) bi->i1.rt_type);
 675                         return -EINVAL;
 676                 }
 677                 loc = &cbs->render_targets[bi->i1.rt_type];
 678                 break;
 679         case vmw_ctx_binding_tex:
 680                 if (unlikely((unsigned)bi->i1.texture_stage >=
 681                              SVGA3D_NUM_TEXTURE_UNITS)) {
 682                         DRM_ERROR("Illegal texture/sampler unit %u.\n",
 683                                   (unsigned) bi->i1.texture_stage);
 684                         return -EINVAL;
 685                 }
 686                 loc = &cbs->texture_units[bi->i1.texture_stage];
 687                 break;
 688         case vmw_ctx_binding_shader:
 689                 if (unlikely((unsigned)bi->i1.shader_type >=
 690                              SVGA3D_SHADERTYPE_MAX)) {
 691                         DRM_ERROR("Illegal shader type %u.\n",
 692                                   (unsigned) bi->i1.shader_type);
 693                         return -EINVAL;
 694                 }
 695                 loc = &cbs->shaders[bi->i1.shader_type];
 696                 break;
 697         default:
 698                 BUG();
 699         }
 700
 701         if (loc->bi.ctx != NULL)
 702                 vmw_context_binding_drop(loc);
 703
 704         loc->bi = *bi;
 705         loc->bi.scrubbed = false;
 706         list_add_tail(&loc->ctx_list, &cbs->list);
 707         INIT_LIST_HEAD(&loc->res_list);
 708
 709         return 0;
 710 }
 711
 712 /**
 713  * vmw_context_binding_transfer: Transfer a context binding tracking entry.
 714  *
 715  * @cbs: Pointer to the persistent context binding state tracker.
 716  * @bi: Information about the binding to track.
 717  *
 718  */
 719 static void vmw_context_binding_transfer(struct vmw_ctx_binding_state *cbs,
 720                                          const struct vmw_ctx_bindinfo *bi)
 721 {
 722         struct vmw_ctx_binding *loc;
 723
 724         switch (bi->bt) {
 725         case vmw_ctx_binding_rt:
 726                 loc = &cbs->render_targets[bi->i1.rt_type];
 727                 break;
 728         case vmw_ctx_binding_tex:
 729                 loc = &cbs->texture_units[bi->i1.texture_stage];
 730                 break;
 731         case vmw_ctx_binding_shader:
 732                 loc = &cbs->shaders[bi->i1.shader_type];
 733                 break;
 734         default:
 735                 BUG();
 736         }
 737
 738         if (loc->bi.ctx != NULL)
 739                 vmw_context_binding_drop(loc);
 740
 741         if (bi->res != NULL) {
 742                 loc->bi = *bi;
 743                 list_add_tail(&loc->ctx_list, &cbs->list);
 744                 list_add_tail(&loc->res_list, &bi->res->binding_head);
 745         }
 746 }
 747
 748 /**
 749  * vmw_context_binding_kill - Kill a binding on the device
 750  * and stop tracking it.
 751  *
 752  * @cb: Pointer to binding tracker storage.
 753  *
 754  * Emits FIFO commands to scrub a binding represented by @cb.
 755  * Then stops tracking the binding and re-initializes its storage.
 756  */
 757 static void vmw_context_binding_kill(struct vmw_ctx_binding *cb)
 758 {
 759         if (!cb->bi.scrubbed) {
 760                 (void) vmw_scrub_funcs[cb->bi.bt](&cb->bi, false);
 761                 cb->bi.scrubbed = true;
 762         }
 763         vmw_context_binding_drop(cb);
 764 }
 765
 766 /**
 767  * vmw_context_binding_state_kill - Kill all bindings associated with a
 768  * struct vmw_ctx_binding state structure, and re-initialize the structure.
 769  *
 770  * @cbs: Pointer to the context binding state tracker.
 771  *
 772  * Emits commands to scrub all bindings associated with the
 773  * context binding state tracker. Then re-initializes the whole structure.
 774  */
 775 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs)
 776 {
 777         struct vmw_ctx_binding *entry, *next;
 778
 779         list_for_each_entry_safe(entry, next, &cbs->list, ctx_list)
 780                 vmw_context_binding_kill(entry);
 781 }
 782
 783 /**
 784  * vmw_context_binding_state_scrub - Scrub all bindings associated with a
 785  * struct vmw_ctx_binding state structure.
 786  *
 787  * @cbs: Pointer to the context binding state tracker.
 788  *
 789  * Emits commands to scrub all bindings associated with the
 790  * context binding state tracker.
 791  */
 792 static void vmw_context_binding_state_scrub(struct vmw_ctx_binding_state *cbs)
 793 {
 794         struct vmw_ctx_binding *entry;
 795
 796         list_for_each_entry(entry, &cbs->list, ctx_list) {
 797                 if (!entry->bi.scrubbed) {
 798                         (void) vmw_scrub_funcs[entry->bi.bt](&entry->bi, false);
 799                         entry->bi.scrubbed = true;
 800                 }
 801         }
 802 }
 803
 804 /**
 805  * vmw_context_binding_res_list_kill - Kill all bindings on a
 806  * resource binding list
 807  *
 808  * @head: list head of resource binding list
 809  *
 810  * Kills all bindings associated with a specific resource. Typically
 811  * called before the resource is destroyed.
 812  */
 813 void vmw_context_binding_res_list_kill(struct list_head *head)
 814 {
 815         struct vmw_ctx_binding *entry, *next;
 816
 817         list_for_each_entry_safe(entry, next, head, res_list)
 818                 vmw_context_binding_kill(entry);
 819 }
 820
 821 /**
 822  * vmw_context_binding_res_list_scrub - Scrub all bindings on a
 823  * resource binding list
 824  *
 825  * @head: list head of resource binding list
 826  *
 827  * Scrub all bindings associated with a specific resource. Typically
 828  * called before the resource is evicted.
 829  */
 830 void vmw_context_binding_res_list_scrub(struct list_head *head)
 831 {
 832         struct vmw_ctx_binding *entry;
 833
 834         list_for_each_entry(entry, head, res_list) {
 835                 if (!entry->bi.scrubbed) {
 836                         (void) vmw_scrub_funcs[entry->bi.bt](&entry->bi, false);
 837                         entry->bi.scrubbed = true;
 838                 }
 839         }
 840 }
 841
 842 /**
 843  * vmw_context_binding_state_transfer - Commit staged binding info
 844  *
 845  * @ctx: Pointer to context to commit the staged binding info to.
 846  * @from: Staged binding info built during execbuf.
 847  *
 848  * Transfers binding info from a temporary structure to the persistent
 849  * structure in the context. This can be done once commands
 850  */
 851 void vmw_context_binding_state_transfer(struct vmw_resource *ctx,
 852                                         struct vmw_ctx_binding_state *from)
 853 {
 854         struct vmw_user_context *uctx =
 855                 container_of(ctx, struct vmw_user_context, res);
 856         struct vmw_ctx_binding *entry, *next;
 857
 858         list_for_each_entry_safe(entry, next, &from->list, ctx_list)
 859                 vmw_context_binding_transfer(&uctx->cbs, &entry->bi);
 860 }
 861
 862 /**
 863  * vmw_context_rebind_all - Rebind all scrubbed bindings of a context
 864  *
 865  * @ctx: The context resource
 866  *
 867  * Walks through the context binding list and rebinds all scrubbed
 868  * resources.
 869  */
 870 int vmw_context_rebind_all(struct vmw_resource *ctx)
 871 {
 872         struct vmw_ctx_binding *entry;
 873         struct vmw_user_context *uctx =
 874                 container_of(ctx, struct vmw_user_context, res);
 875         struct vmw_ctx_binding_state *cbs = &uctx->cbs;
 876         int ret;
 877
 878         list_for_each_entry(entry, &cbs->list, ctx_list) {
 879                 if (likely(!entry->bi.scrubbed))
 880                         continue;
 881
 882                 if (WARN_ON(entry->bi.res == NULL || entry->bi.res->id ==
 883                             SVGA3D_INVALID_ID))
 884                         continue;
 885
 886                 ret = vmw_scrub_funcs[entry->bi.bt](&entry->bi, true);
 887                 if (unlikely(ret != 0))
 888                         return ret;
 889
 890                 entry->bi.scrubbed = false;
 891         }
 892
 893         return 0;
 894 }
 895
 896 /**
 897  * vmw_context_binding_list - Return a list of context bindings
 898  *
 899  * @ctx: The context resource
 900  *
 901  * Returns the current list of bindings of the given context. Note that
 902  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 903  */
 904 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
 905 {
 906         return &(container_of(ctx, struct vmw_user_context, res)->cbs.list);
 907 }